Base oil modified layer, manufacturing method thereof and appliance

Abstract

The invention provides a base oil modified layer, a manufacturing method thereof and an appliance. Wherein the base oil modified layer comprises a first cross-linking product layer and liquid silicone oil compounded on the first cross-linking product layer, the first cross-linking product layer comprises a mixed layer of a first cross-linking product and a second cross-linking product, the first cross-linking product is a cross-linking product of polyamide-imide resin and polyethersulfone resin, and the second cross-linking product is a cross-linking product of polyamide-imide resin and polyethersulfone resin. The second cross-linking product is a cross-linking product among particles of modified polyaryletherketone, and the modified polyaryletherketone is polyaryletherketone resin grafted with a polycondensable group. According to the base oil modified layer provided by the embodiment of the invention, the base oil modified layer can show certain lasting non-stickiness and high-temperature non-stickiness under the condition that the transition connection function of the base oil modified layer is ensured.

Description

Technical Field

[0001] This application relates to the field of appliance technology, and in particular to a base oil modified layer, its manufacturing method, and an appliance. Background Technology

[0002] In the cookware industry, base oil is usually used as a coating to form a bonding layer between the top oil layer and the substrate. Therefore, when the cookware wears down to this bonding layer, there is usually a significant sticking phenomenon. Existing base oil layers are difficult to have both good transition bonding performance and non-stick properties at the same time. Summary of the Invention

[0003] The purpose of this application is to provide a primer modified layer, a method for manufacturing the same, and an apparatus, to solve the technical problem that existing apparatuses formed from primer coatings cannot simultaneously possess transition bonding performance and non-stick properties.

[0004] According to a first aspect of this application, this application provides a base oil modified layer, wherein the base oil modified layer includes a first crosslinking product layer and a liquid silicone oil composited on the first crosslinking product layer, wherein the first crosslinking product layer includes a mixed layer of a first crosslinking product and a second crosslinking product, wherein the first crosslinking product is a crosslinking product of polyamide-imide resin and polyethersulfone resin, and the second crosslinking product is a crosslinking product between particles of modified polyaryletherketone, wherein the modified polyaryletherketone is a polyaryletherketone resin grafted with polycondensable groups.

[0005] According to the base oil modified layer provided in the embodiments of this application, the modified polyaryletherketone particles in the base oil are cross-linked by polycondensable groups to form a uniform and dense first cross-linked product layer, which provides a good connection framework for the base oil modified layer. In addition, the first cross-linked product layer itself has certain long-lasting non-stick and high-temperature non-stick properties, and can facilitate the composite liquid silicone oil, promoting the continuous and stable release of liquid silicone oil. Thus, while ensuring the transition connection function of the base oil modified layer, it can make it exhibit certain long-lasting non-stick and high-temperature non-stick properties.

[0006] In some embodiments, the liquid silicone oil is bonded to the first crosslinked product layer; and / or, the liquid silicone oil is adsorbed on the surface of the first crosslinked product layer; and / or, the first crosslinked product layer has a multidimensional network structure, and the liquid silicone oil fills into the multidimensional network structure of the first crosslinked product layer.

[0007] In these embodiments, the composite forms of liquid silicone oil and the first crosslinking product layer are diverse, which can ensure the amount and strength of the composite of liquid silicone oil, so that the liquid silicone oil can be continuously and stably released from the base oil modified layer to form an oil film effect, thereby further improving the durable non-stick and high-temperature non-stick properties of the device with the base oil modified layer.

[0008] In some embodiments, the polyaryletherketone resin includes at least one of polyetherketone, polyetheretherketone, polyetherketoneketone, polyetheretherketoneketone, and polyetherketoneetherketoneketone. Correspondingly, the modified polyaryletherketone is at least one of polyetherketone, polyetheretherketone, polyetherketoneketone, polyetheretherketoneketone, and polyetherketoneetherketoneketone grafted with polycondensation-capable groups. Compared with fluorocarbon resins, these modified polyaryletherketones exhibit superior resistance to mechanical impact, hardness, and self-lubricating properties. Therefore, they possess superior wear resistance and non-stick properties during actual cooking. Furthermore, these modified polyaryletherketones possess good thermal stability, making them less prone to thermal decomposition, and eliminating the risk of fluorocarbon coatings releasing harmful fluorinated substances due to thermal decomposition. Compared with siloxane sol, modified polyaryletherketone has higher crystallinity, which makes the obtained base oil modified layer significantly superior to the film layer formed by siloxane sol in terms of density, mechanical strength and thermal stability. In this way, the defects of high temperature non-stick substances volatilization (mainly silicone oil) can be significantly reduced (temperature resistance >300℃), thus effectively extending the service life of the appliance.

[0009] In some embodiments, the polycondensable groups include at least two of sulfonic acid groups, nitro groups, hydroxyl groups, carboxyl groups, and amino groups, or hydroxyl or amino groups. Correspondingly, the modified polyaryletherketones (PAEs) can include at least two of sulfonic acid-modified PAEs, nitro-modified PAEs, hydroxyl-modified PAEs, carboxyl-modified PAEs, and amino-modified PAEs, or hydroxyl or amino-modified PAEs. The network structure formed by these specific modified PAEs can be used to improve the strength of the primer modification layer without excessively affecting the basic properties of the PAE resin. Using it as the skeleton of the primer modification layer can further improve the wear resistance and non-stick properties required for appliance coatings.

[0010] In some embodiments, the liquid silicone oil includes methyl silicone oil or hydroxyl silicone oil, which have lower surface energy and can further optimize the durable non-stick and high-temperature non-stick properties of the appliance having the base oil modified layer by forming an oil film.

[0011] In some embodiments, the thickness of the base oil modified layer is 15-30 micrometers. Such a thickness can help balance the stress and cost of the appliance's layer structure while ensuring the basic properties—transitional bonding performance.

[0012] In some embodiments, the first crosslinked product layer has a porosity of 20%-65% and a pore size of 10 nanometers-1 micrometer. The first crosslinked product layer with such a pore structure can better lock in silicone oil, thus improving the overall non-stickiness of the base oil modified layer due to the continuous and stable release of silicone oil.

[0013] In some embodiments, the weight ratio of the first crosslinked product layer to the liquid silicone oil is (26-40):(4-8). The two work synergistically to form a stable base oil modified layer, so as to ensure the transition connection function of the base oil modified layer while making it exhibit certain long-lasting non-stick and high-temperature non-stick properties.

[0014] In some embodiments, the weight ratio of the first crosslinking product (the crosslinking product of polyamide-imide resin and polyethersulfone resin) to the second crosslinking product (the interparticle crosslinking product of modified polyaryletherketone) in the first crosslinking product layer is (6-10):(20-30).

[0015] In these embodiments, the first crosslinking product layer is mainly composed of crosslinking products between modified polyaryletherketone particles, supplemented by crosslinking products of polyamide-imide resin and polyethersulfone resin. This fully utilizes the properties of modified polyaryletherketone similar to those of polyaryletherketone resin, resulting in a first crosslinking product layer with excellent resistance to mechanical impact, hardness, and self-lubricating properties. Consequently, the first crosslinking product layer possesses certain long-lasting non-stick properties, high-temperature non-stick properties, and durability.

[0016] In some embodiments, the base oil modified layer further includes a filler, the filler and the liquid silicone oil being dispersed in the first crosslinking product layer, the weight ratio of the first crosslinking product layer, the liquid silicone oil and the filler being (26-40):(4-8):(3-10), the filler enabling the formed base oil modified layer to have significant roughness, thereby improving the bonding performance with its directly bonded layer or appliance substrate (layer, for example, a top oil modified layer, appliance substrate, for example, a cookware substrate) due to the roughness, and improving the hardness and wear resistance of the base oil modified layer, as well as reducing costs.

[0017] In some embodiments, the filler includes at least one selected from carbon black, silicon carbide, titanium dioxide, and alumina. These fillers can increase physical barrier properties and heat transfer between the resin particles in the primer modification layer, and extend the penetration path of corrosive liquids, thereby giving the primer modification layer enhanced hardness, wear resistance, and thermal stability. In a preferred embodiment, the filler has a nanoscale size; nanoscale fillers have numerous bonding sites, thus ensuring the adhesion between the primer modification layer and the appliance substrate.

[0018] In some embodiments, the base oil modified layer is formed by curing the base oil, wherein the base oil includes a dispersion solution, a composite material, a polyamide-imide resin, and a polyethersulfone resin, wherein the composite material, the polyamide-imide resin, and the polyethersulfone resin are respectively dispersed in the dispersion solution, wherein the composite material is a material comprising modified polyaryletherketone and a first liquid silicone oil, wherein the modified polyaryletherketone is a polyaryletherketone resin grafted with polycondensable groups.

[0019] In these embodiments, the composite material serves as the non-stick molecule in the base oil. The modified polyaryletherketone in the composite material is a polyaryletherketone resin grafted with polycondensable groups, possessing similar excellent properties to polyaryletherketone resins, such as non-stickiness and abrasion resistance. This enables the first crosslinked product layer to possess certain long-lasting non-stickiness and high-temperature non-stickiness. Furthermore, the modified polyaryletherketone, due to its polycondensable groups, possesses chemical activity and can form a uniform and dense network structure through crosslinking under the high-temperature environment of sintering and curing to form the base oil modified layer. This network structure facilitates the composite liquid silicone oil, promoting the continuous and stable release of the liquid silicone oil. Thus, while ensuring the transitional connection function of the base oil modified layer, it exhibits certain long-lasting non-stickiness and high-temperature non-stickiness.

[0020] In some embodiments, the first liquid silicone oil is bonded to the modified polyaryletherketone; and / or, the first liquid silicone oil is adsorbed on the surface of the modified polyaryletherketone; and / or, the modified polyaryletherketone has a porous structure, and the first liquid silicone oil fills the porous structure of the modified polyaryletherketone.

[0021] In these embodiments, the composite material obtained by combining modified polyaryletherketone (PAE) and the first liquid silicone oil has good bonding properties and can load more liquid silicone oil through the modified PAE, thereby increasing the amount of silicone oil retained in the base oil of the composite material. During the subsequent sintering process of forming the base oil modified layer through the base oil, the particles of modified PAE in the composite material can cross-link with each other to form a multi-dimensional network structure as the skeleton of the base oil modified layer, ensuring the basic non-stick and wear resistance of the base oil modified layer. The silicone oil in the composite material will continue to be retained in the pores of the corresponding positions of the network structure as the softened modified PAE softens, and has a bonding strength that can be released at a stable rate. Thus, the liquid silicone oil can be continuously and stably released from the base oil modified layer to form an oil film effect, thereby further improving the long-lasting non-stick and high-temperature non-stick properties of the container with the base oil modified layer.

[0022] In some embodiments, the modified polyaryletherketone in the primer has a particle size of 30 nm to 205 nm. This is because the modified polyaryletherketone is slightly larger than the solid modified polyaryletherketone due to slight swelling in the liquid primer coating, but not to the point of agglomeration of multiple particles due to swelling. As the main film-forming substance in the primer, this size is conducive to uniform dispersion in the primer, forming a primer with uniform dispersion of the film-forming substance for non-sticking, thereby facilitating the manufacture of a primer modified layer with good non-stick uniformity.

[0023] In some embodiments, the polyamide-imide resin in the base oil has a particle size of 15-20 nanometers, and the polyethersulfone resin in the base oil has a particle size of 15-20 nanometers. These resins, acting as reinforcing materials in the base oil, are of such a size that facilitates uniform dispersion in the base oil, forming a base oil for uniform dispersion of the reinforcing materials, thereby facilitating the manufacture of a base oil modified layer with stable strength. Furthermore, the resin particles of these sizes form a base oil modified layer with a nanoscale uneven bonding surface, providing a lotus leaf-like papillary structure for the topcoat layer, thereby enabling the topcoat modified layer to possess improved non-stickiness.

[0024] In some embodiments, the modified polyaryletherketone with the porous structure has a porosity of 30%-70% and a pore size of 10nm-120nm. The modified polyaryletherketone with such a porous structure can easily store more silicone oil. Thus, the high silicone oil content can improve the non-stickiness of the composite material, thereby improving the overall non-stickiness of the base oil.

[0025] In some embodiments, the weight ratio of modified polyaryletherketone to first liquid silicone oil in the composite material is (20-30):(3-6). Thus, the composite material has a high silicone oil content, which can help improve the overall non-stick properties of the base oil, thereby enabling the base oil modification layer to continuously release silicone oil to further improve the durable non-stick and high-temperature non-stick performance of the appliance.

[0026] In some embodiments, the weight ratio of the dispersion solution, modified polyaryletherketone, first liquid silicone oil, polyamide-imide resin, and polyethersulfone resin in the base oil is (55-75):(20-30):(3-6):(3-5):(3-5). With such a weight ratio, the non-stick film-forming material-composite material, the reinforcing polyamide-imide resin, and the polyethersulfone resin can all be uniformly dispersed in the dispersion solution to form a well-dispersed base oil. This lays the foundation for the non-stick uniformity and strength uniformity of the subsequently formed base oil modified layer, thereby ensuring the non-stick uniformity and quality stability of the device with the base oil modified layer.

[0027] In some embodiments, the dispersion solution includes at least one of water and an organic solvent that cannot dissolve the modified polyaryletherketone. These dispersion solutions ensure the dispersibility of the composite material without dissolving the modified polyaryletherketone in the composite material, thereby ensuring the structural stability of the modified polyaryletherketone. This allows for reliable loading of liquid silicone oil until a base oil modification layer is formed. Furthermore, the modified polyaryletherketone is not easily dissolved, which facilitates reliable dispersion in the base oil and controls the overall viscosity and flowability of the base oil. This results in a base oil that is uniformly dispersed and easy to apply for non-stick film formation. This facilitates the cross-linking of the modified polyaryletherketone particles during the sintering process to encapsulate the liquid silicone oil, thus laying the foundation for the non-stick uniformity of the base oil modification layer. This ensures the non-stick uniformity and quality stability of the appliance equipped with the base oil modification layer.

[0028] In some embodiments, the dispersion solution contains a cationic surfactant, which is used to disperse at least the composite material, the polyamide-imide resin, and the polyethersulfone resin.

[0029] In these embodiments, by adding a cationic surfactant to the dispersion solution, the cationic surfactant can promote the uniform dispersion of the composite material, polyamide-imide resin and polyethersulfone resin, laying the foundation for the uniformity of the subsequently formed base oil modified layer, thereby benefiting the non-stick uniformity and quality stability of the entire base oil modified layer.

[0030] In some embodiments, the base oil further includes a second liquid silicone oil dispersed in the dispersion solution. Thus, the second liquid silicone oil dispersed in the base oil can be trapped between the composite materials during the cross-linking process of the modified polyaryletherketones of adjacent composite materials, further increasing the silicone oil content of the formed base oil modified layer, thereby further improving the durable non-stick effect of the appliance having the base oil modified layer.

[0031] In some embodiments, the weight ratio of the dispersion solution, modified polyaryletherketone, first liquid silicone oil, polyamide-imide resin, polyethersulfone resin and second liquid silicone oil is (55-75):(20-30):(3-6):(3-5):(3-5):(1-2), thereby further improving the non-stickiness of the base oil modified layer prepared from the base oil due to the increased silicone oil content.

[0032] In some embodiments, the base oil further includes a dispersing agent and a filler, wherein the composite material, filler and dispersing agent are uniformly dispersed in the dispersion solution, wherein the composite material, polyamide-imide resin, polyethersulfone resin, filler and dispersing agent are uniformly dispersed in the dispersion solution, and the weight ratio of the dispersion solution, modified polyaryletherketone, first liquid silicone oil, polyamide-imide resin, polyethersulfone resin, filler and dispersing agent is (55-75):(20-30):(3-6):(3-5):(3-5):(3-10):(5-10).

[0033] In these embodiments, fillers can increase the roughness, hardness, and abrasion resistance of the base oil-modified layer while reducing costs. Dispersants are used to uniformly disperse solid particles (such as resins, fillers, etc.) in the dispersion solution, preventing particle agglomeration, thereby improving the fluidity and workability of the base oil and ensuring the basic properties of the resulting base oil-modified layer. After application, the dispersion solution and dispersants evaporate, leaving the remaining solid components to form the base oil-modified layer.

[0034] In some embodiments, the filler is at least one selected from carbon black, silicon carbide, titanium dioxide, and alumina. These fillers can increase physical barrier and heat transfer between the resin particles of the primer modified layer, and extend the penetration path of corrosive liquids, thereby giving the primer modified layer enhanced hardness, wear resistance, and thermal stability. In a preferred embodiment, the filler has a nanoscale size, and the filler with a nanoscale size has more bonding sites, thereby ensuring the adhesion between the primer modified layer and the appliance substrate. It should be noted that when multiple fillers are used, this application does not limit the mixing ratio of the various substances.

[0035] In some embodiments, the dispersant in the primer is at least one selected from isopropanol, pyrrolidone, and associative polyurethane. This improves the dispersibility of the dispersion and ensures its dispersibility after long-term storage. Isopropanol has good solubility and volatility; as a dispersant, it helps to uniformly disperse fillers in various resins, improving the stability and workability of the primer. Pyrrolidone is a polar solvent with good solubility for many organic substances and also has a certain dispersing ability. When used in combination with isopropanol, it can further improve the uniformity of solid particle dispersion in the primer.

[0036] In some embodiments, the filler has a particle size of 15-20 nanometers. The small particle size can improve the wear resistance of the formed base oil modified layer and ensure the fluidity and smoothness of the base oil when sprayed onto the appliance substrate, thereby reducing defects in the formed base oil modified layer.

[0037] In some embodiments, the first crosslinked product layer comprises a crosslinked product having at least one chemical bond selected from ester bonds, aliphatic ethers, aromatic ethers, amide bonds, aromatic amines, sulfonates, and sulfonamides, and having a benzene ring, a carbonyl group, and a carbon-carbon bond.

[0038] In these embodiments, performance can be specifically optimized by using different types of chemical bonds (e.g., increasing the proportion of ester bonds to improve hardness, or introducing more ether bonds to enhance toughness) to meet the needs of different application scenarios. For example, the product layer has ester / amide bonds, which can provide hydrogen bonding, enhance intermolecular bonding, and improve the hardness and heat resistance of the product layer; it also has aromatic amine / sulfonamides, which, due to the introduction of a rigid structure, can improve the mechanical strength and creep resistance of the product layer. Sulfonate esters can improve the polarity and solubility of the material, facilitating compounding with other components. In addition, the benzene ring, carbonyl group, and carbon-carbon bond are inherent bonds of polyaryletherketone, which is the basis for endowing the product layer with comparable superior properties compared to polyaryletherketone resins.

[0039] According to a second aspect of this application, a method for manufacturing a base oil modified layer is provided, wherein the method comprises: providing polyaryletherketone particles having a porous structure; activating the polyaryletherketone particles to graft polycondensable groups onto the polyaryletherketone particles having a porous structure, thereby forming a modified polyaryletherketone; forming a second mixed slurry comprising liquid silicone oil, the modified polyaryletherketone, a polyamide-imide resin, a polyethersulfone resin, and a dispersion solution, wherein at least a portion of the liquid silicone oil is composited onto the modified polyaryletherketone in the second mixed slurry to form a composite material, thereby obtaining a base oil in which the composite material, the polyamide-imide resin, and the polyethersulfone resin are respectively dispersed in the dispersion solution; coating the base oil and sintering and curing, thereby obtaining the base oil modified layer.

[0040] According to the manufacturing method of the base oil modified layer provided in the embodiments of this application, the base oil modified layer becomes dense due to mutual cross-linking during the curing process and forms a three-dimensional network structure to coat the silicone oil. This network structure is formed through a cross-linking reaction and has uniform pores, which can promote the continuous and stable release of silicone oil, thereby improving the long-lasting non-stick and high-temperature non-stick properties of the base oil modified layer as a transitional link.

[0041] Furthermore, the dispersion solution allows for thorough mixing of liquid silicone oil and modified polyaryletherketone (PAEK), forming a homogeneous mixture that is less prone to stratification or particle agglomeration. This avoids the uneven dispersion caused by the polarity difference between the liquid silicone oil and modified PAEK, and the stratification of heterogeneous mixtures formed by silicone oil coating PAEK particles. Additionally, the dispersion solution can reduce the viscosity of the mixture and, through solvation, coat the particle surface, reducing interparticle interactions and promoting uniform dispersion.

[0042] In some embodiments, the step of providing polyaryletherketone particles with a porous structure includes: providing a mixed slurry comprising a polyaryletherketone resin and a solvent; and performing spray drying on the mixed slurry to obtain the polyaryletherketone particles with a porous structure.

[0043] In these embodiments, spray drying of a mixed slurry formed from polyaryletherketone resin and solvent can create polyaryletherketone particles with a porous structure, thus paving the way for subsequent activation treatment and silicone oil filling. For example, the porous structure of the polyaryletherketone particles allows for more thorough activation treatment. Specifically, the porous structure of the polyaryletherketone particles enables the subsequent activation treatment to be applied to both the surface of the polyaryletherketone particles and the inner wall of the porous structure. This results in polycondensable groups being grafted onto both the surface of the polyaryletherketone particles and the inner wall of the porous structure. The polycondensable groups on the surface of the polyaryletherketone particles promote interparticle bonding of the modified polyaryletherketone, while the polycondensable groups on the inner wall of the porous structure facilitate bonding with hydroxyl silicone oil via hydrogen bonding. This ensures the strong bonding of the filled silicone oil and guarantees the continuous and stable release of silicone oil in the base oil modification layer under thermal influence, further improving the durable non-stick properties and high-temperature non-stick properties of the appliance. For example, polyaryletherketone particles with porous structures can incorporate more silicone oil into subsequent modified polyaryletherketones, extending the release cycle of silicone oil in the primer modified layer, thereby improving the long-lasting non-stickiness and high-temperature non-stickiness of the primer modified layer.

[0044] In some embodiments, the mixed slurry further includes a foaming agent, which facilitates the opening of pores inside the swollen polyaryletherketone resin, resulting in a more uniform and numerous pore structure in the final polyaryletherketone particles, thereby paving the way for subsequent activation treatment and silicone oil filling.

[0045] In some embodiments, the weight ratio of the polyaryletherketone resin, solvent and foaming agent is (5-25):(70-94):(1-5).

[0046] In these embodiments, the polyaryletherketone resin, solvent, and foaming agent are in a suitable weight ratio to fully swell the polyaryletherketone resin and fully foam to form polyaryletherketone particles with the desired porous structure.

[0047] In some embodiments, the foaming agent includes at least one of ammonium bicarbonate, sodium bicarbonate, azodicarbonamide, and supercritical CO2, which have the advantages of both good foaming ability and low cost.

[0048] In some embodiments, the solvent includes water and / or an organic solvent to ensure uniform dispersion of the polyaryletherketone resin in the mixed slurry, thereby facilitating subsequent processes.

[0049] In some embodiments, the activation treatment includes at least one of sulfonation, nitration, plasma treatment, corona treatment, and laser etching. Through the above activation treatment, corresponding polycondensable groups can be grafted onto the polyaryletherketone particles to increase the activity of the modified polyaryletherketone. This facilitates the cross-linking of adjacent modified polyaryletherketones in the subsequent modified coating during the high-temperature sintering stage, thereby promoting the formation of a network structure in the modified layer and continuously locking in the liquid silicone oil to achieve durable non-stick properties and high-temperature non-stick performance.

[0050] According to a third aspect of this application, an apparatus is provided, wherein the apparatus includes an apparatus substrate and a base oil modified layer formed on the apparatus substrate according to the above embodiments.

[0051] In some embodiments, the utensil includes frying pans, rice cooker inner pots, cups, kettles, or knives. A wide variety of utensils are applicable, and multiple types of utensils can be formed.

[0052] In some embodiments, the appliance further includes a top oil modified layer disposed on the surface of the base oil modified layer opposite to the appliance substrate. The top oil modified layer includes a second crosslinking product layer and liquid silicone oil composited on the second crosslinking product layer. The second crosslinking product layer includes a product layer of crosslinked modified polyaryletherketones. The modified polyaryletherketone is a polyaryletherketone resin grafted with polycondensable groups.

[0053] In these embodiments, the second crosslinked product layer composed of crosslinked products is uniform, dense, and has certain long-lasting non-stick and high-temperature non-stick properties. It can also facilitate the composite liquid silicone oil, promote the continuous and stable release of liquid silicone oil, thereby improving the long-lasting non-stick and high-temperature non-stick properties of the topcoat modified layer.

[0054] In some embodiments, the liquid silicone oil is bonded to the second crosslinked product layer; and / or, the liquid silicone oil is adsorbed on the surface of the second crosslinked product layer; and / or, the second crosslinked product layer is porous, and the liquid silicone oil fills the pores of the second crosslinked product layer.

[0055] In these embodiments, the composite forms of liquid silicone oil and the second crosslinked product layer are diverse, which can ensure the amount and strength of the composite of liquid silicone oil, so that the liquid silicone oil can be continuously and stably released from the top oil modified layer to form an oil film effect, thereby further improving the durable non-stick and high-temperature non-stick properties of the device with the top oil modified layer.

[0056] In some embodiments, the polyaryletherketone resin includes at least one of polyetherketone, polyetheretherketone, polyetherketoneketone, polyetheretherketoneketone, and polyetherketoneetherketoneketone. These polyaryletherketone resins exhibit superior resistance to mechanical impact, hardness, and self-lubricating properties compared to fluorocarbon resins. Therefore, they possess superior wear resistance and non-stick properties during actual cooking. Furthermore, these polyaryletherketone resins exhibit good thermal stability and are not easily decomposed by heat, thus eliminating the risk of fluorocarbon coatings releasing harmful fluorine-containing substances due to thermal decomposition. Compared to siloxane sols, they have higher crystallinity, resulting in a surface oil-modified layer that is significantly superior in terms of density, mechanical strength, and thermal stability to the film layer formed by siloxane sols. This significantly reduces the defects of high-temperature non-stick material volatilization (mainly silicone oil) (temperature resistance >300℃), thereby effectively extending the service life of utensils.

[0057] In some embodiments, the polycondensable groups include at least two of sulfonic acid groups, nitro groups, hydroxyl groups, carboxyl groups, and amino groups, or hydroxyl or amino groups. Correspondingly, the modified polyaryletherketones can include at least two of sulfonic acid-modified polyaryletherketones, nitro-modified polyaryletherketones, hydroxyl-modified polyaryletherketones, carboxyl-modified polyaryletherketones, and amino-modified polyaryletherketones, or hydroxyl or amino-modified polyaryletherketones. The network structure formed by these specific modified polyaryletherketones can be used to improve the strength of the topcoat modified layer without excessively affecting the basic properties of the polyaryletherketone resin. Using it as the skeleton of the topcoat modified layer can further improve the wear resistance and non-stick properties required for appliance coatings.

[0058] In some embodiments, the liquid silicone oil includes methyl silicone oil or hydroxyl silicone oil, which have lower surface energy and can further optimize the durable non-stick and high-temperature non-stick properties of the appliance having the surface oil modified layer by forming an oil film.

[0059] In some embodiments, the thickness of the topcoat modified layer is 15-30 micrometers. This thickness allows for a balance between stress and cost in the appliance's layer structure while ensuring the essential non-stick properties. And / or, the second crosslinked product layer has a porosity of 20%-65% and a pore size of 10 nanometers-1 micrometer. This pore structure allows for better locking of the silicone oil, thus improving the overall non-stick properties of the topcoat modified layer due to the continuous and stable release of the silicone oil.

[0060] In some embodiments, the weight ratio of the second crosslinking product layer to the liquid silicone oil is (35-40):(6-10). The second crosslinking product layer and the liquid silicone oil work synergistically to form a stable surface oil modified layer, thereby further improving the long-lasting non-stickiness and high-temperature non-stickiness.

[0061] In some embodiments, the surface oil modified layer further includes filler, and the filler and the hydraulic silicone oil are both dispersed in the second crosslinking product layer. The weight ratio of the second crosslinking product layer, the liquid silicone oil and the filler is (35-40):(6-10):(3-10). In this way, the surface oil modified layer can have improved wear resistance due to sufficient hardness.

[0062] In some embodiments, the filler includes at least one of mica and silicon carbide. Mica has excellent lamellar structure, high thermal stability, and chemical stability. Adding mica to the topcoat can form a dense topcoat modified layer, improving the hardness and scratch resistance of the topcoat modified layer, while also enhancing its corrosion resistance. Silicon carbide has high hardness, high wear resistance, and high thermal conductivity. Adding silicon carbide to the topcoat can significantly improve the hardness and wear resistance of the topcoat modified layer. Furthermore, due to its high thermal conductivity, it facilitates rapid heat dissipation from the topcoat modified layer, improving its thermal stability. Attached Figure Description

[0063] The above and other aspects, features, and other advantages of this application will become clearer and more readily understood from the following detailed description of exemplary embodiments in conjunction with the accompanying drawings, in which: Figure 1 A schematic diagram of the structure of polyaryletherketone particles with a porous structure provided according to an exemplary embodiment of this application is shown. Figure 2 A schematic diagram illustrating the formation principle of the composite material in the oil-storing active body provided according to an exemplary embodiment of this application is shown. Figure 3 A schematic diagram of the molecular structure of a modified polyarylether ketone provided according to an exemplary embodiment of this application is shown. Figure 4 and Figure 5 The diagrams illustrate the formation principle of the crosslinked products in the base oil modified layer provided according to exemplary embodiments of this application. Detailed Implementation

[0064] The following will combine Figures 1 to 5 This application describes the base oil, base oil modified layer, and manufacturing method and apparatus provided in the embodiments of this application.

[0065] According to a first aspect of this application, a base oil is provided as a liquid, non-sticky transitional coating having fluidity, wherein the base oil includes a dispersion solution and a composite material, a polyamide-imide resin, and a polyethersulfone resin dispersed in the dispersion solution, the composite material being a material comprising a modified polyaryletherketone and a first liquid silicone oil, wherein the modified polyaryletherketone is a polyaryletherketone resin grafted with polycondensable groups.

[0066] According to the base oil provided in the embodiments of this application, the composite material serves as the non-stick molecule in the base oil. The modified polyaryletherketone in the composite material is a polyaryletherketone resin grafted with polycondensable groups, possessing excellent properties similar to polyaryletherketone resin. Furthermore, the modified polyaryletherketone in the base oil is chemically active due to the presence of polycondensable groups. Moreover, the particles of the modified polyaryletherketone can easily cross-link with each other under the high-temperature environment of sintering and curing in the subsequent formation of the base oil modified layer, forming a uniform and dense cross-linked product with a network structure, providing a good connection framework for the base oil modified layer. In addition, the cross-linked product with a network structure itself has certain long-lasting non-stick and high-temperature non-stick properties, and can facilitate the composite liquid silicone oil, promoting the continuous and stable release of liquid silicone oil. Thus, while ensuring the transition connection function of the base oil modified layer, it can exhibit certain long-lasting non-stick and high-temperature non-stick properties.

[0067] According to this application, the primer does not contain non-stick components such as fluorocarbon resins (e.g., PTFE) or siloxane sol-polymers. Instead, it uses only composite materials including modified polyaryletherketone and first liquid silicone oil, polyamide-imide resin, and polyethersulfone resin as the non-stick film-forming substances in the primer. This meets PFAS hygiene requirements, reduces environmental pollution and potential harm to human health, and achieves durable and high-temperature non-stick properties for appliances, making it more environmentally friendly and healthier, and providing a new approach for the coatings industry. Compared to fluorocarbon resin coatings, the primer of this application does not have the risk of thermal decomposition and volatilization of harmful substances associated with fluorocarbon coatings. Compared to siloxane sol-polymer coatings, the primer of this application does not have the defect of high-temperature volatilization of non-stick substances, thus effectively extending the non-stick service life of non-stick appliances.

[0068] According to this application, polyaryletherketone resin (PAEK) includes at least one of polyetherketone (PEK), polyetheretherketone (PEEK), polyetherketoneketone (PEKK), polyetheretherketoneketone (PEEKK), and polyetherketoneetherketoneketone (PEKEKK). Correspondingly, the modified polyaryletherketone is at least one of polyetherketone, polyetheretherketone, polyetherketoneketone, polyetheretherketoneketone, and polyetherketoneetherketoneketone grafted with polycondensation-capable groups. These modified polyaryletherketones have superior mechanical impact resistance, hardness, and self-lubricating properties compared to fluorocarbon resins.

[0069] In this application, the polyaryletherketone resin has a crystallinity of 30%-35%, with highly compact molecular chains. The crystalline molecular chains are tightly packed, while the amorphous molecular chains, though disordered, are constrained by the crystalline regions, resulting in a more compact structure for the base oil modified layer. The polyaryletherketone has a degree of polymerization of 100-300, which is moderately high. Choosing this degree of polymerization ensures that the molecular chains form a sufficient number of entanglement points (approximately 10-30 entanglement points per chain), significantly improving the melt viscosity and melt strength during the sintering process of forming the base oil modified layer. This prevents melt fracture or drooling during sintering and also provides good tensile strength, heat resistance, and corrosion resistance.

[0070] According to this application, the modified polyaryletherketone (PAEK) has a porous structure with a porosity of 30%-70% and a pore size of 10nm-120nm. This porous structure allows the modified PAEK to store more silicone oil, thus improving the non-stick properties of the composite material due to the high silicone oil content, thereby enhancing the overall non-stick properties of the base oil. It should be noted that in this application, porosity specifically refers to the cross-sectional porosity of the modified PAEK, obtained through imaging analysis after slicing and polishing, reflecting the proportion of pores within the modified PAEK.

[0071] According to this application, the primer comprises a composite material, a polyamide-imide resin (PAI), a polyethersulfone resin (PES), and a dispersion solution. In the primer, the composite material, as a non-stick molecule, possesses high mechanical strength, heat resistance, and chemical stability, and is the main film-forming substance in the primer, contributing to the formation of a tough, durable, and non-sticky primer-modified layer. Both the polyamide-imide resin and the polyethersulfone resin exhibit excellent heat resistance, corrosion resistance, and adhesion. When the polyamide-imide resin and the polyethersulfone resin are blended in the molten state, their molecular chains can interpenetrate and intertwine, forming physical cross-linking points, thereby significantly improving the heat resistance of the primer-modified layer and its adhesion to the substrate at high temperatures. The dispersion solution is a volatile component in the coating, used to dilute other components, making the coating easier to apply. During the spraying process to form the primer modified layer, the dispersion solution evaporates, and the polyamide-imide resin and polyethersulfone resin physically crosslink, forming a denser and tougher network structure. The composite material can be uniformly dispersed in the network structure of the crosslinked products and further crosslinked with them, thereby improving the overall performance (strength, adhesion, heat resistance, and corrosion resistance) of the primer modified layer.

[0072] In some embodiments, the weight ratio of modified polyaryletherketone to first liquid silicone oil in the composite material is (20-30):(3-6). Thus, the composite material has a high silicone oil content, which can help improve the overall non-stick properties of the base oil, thereby enabling the base oil modified layer to continuously release silicone oil to pave the way for further improvement of the appliance's durable non-stick and high-temperature non-stick performance.

[0073] In some embodiments, the weight ratio of the dispersion solution, modified polyaryletherketone, first liquid silicone oil, polyamide-imide resin, and polyethersulfone resin in the base oil is (55-75):(20-30):(3-6):(3-5):(3-5). With such a weight ratio, the non-stick film-forming material-composite material, the reinforcing polyamide-imide resin, and the polyethersulfone resin can all be uniformly dispersed in the dispersion solution to form a well-dispersed base oil. This lays the foundation for the non-stick uniformity and strength uniformity of the subsequently formed base oil modified layer, thereby ensuring the non-stick uniformity and quality stability of the device with the base oil modified layer.

[0074] In some embodiments, the dispersion solution includes at least one of water and an organic solvent that cannot dissolve the modified polyaryletherketone. These dispersion solutions ensure the dispersibility of the composite material and do not dissolve the modified polyaryletherketone in the composite material, thereby ensuring the structural stability of the modified polyaryletherketone and reliably loading liquid silicone oil until a base oil modification layer is formed.

[0075] In some embodiments, a cationic surfactant is dispersed in the dispersion solution. The cationic surfactant is used to disperse at least the composite material, the polyamide-imide resin, and the polyethersulfone resin, thereby improving the non-stickiness, uniformity, and quality stability of the entire base oil modified layer.

[0076] In some embodiments, the base oil further includes a second liquid silicone oil dispersed in a dispersion solution, thereby further enhancing the durable non-stick effect of the appliance having the base oil modified layer.

[0077] In some embodiments, the weight ratio of the dispersion solution, modified polyaryletherketone, first liquid silicone oil, polyamide-imide resin, polyethersulfone resin and second liquid silicone oil is (55-75):(20-30):(3-6):(3-5):(3-5):(1-2), thereby further improving the non-stickiness of the base oil modified layer prepared from the base oil due to the increased silicone oil content.

[0078] In some embodiments, the composite material, polyamide-imide resin, and polyethersulfone resin particles in the base oil are in the shape of round or elliptical particles. Such shapes can form a denser base oil modification layer through close packing, thereby improving corrosion resistance.

[0079] In some embodiments, the particle size of the modified polyaryletherketone in the primer is 30 nm to 205 nm. Because it expands slightly in liquid coatings and is slightly larger than the size of solid modified polyaryletherketone, but not to the point of agglomeration of multiple particles due to swelling, this size is conducive to uniform dispersion in the primer as a non-stick film-forming substance in the primer, forming a primer with uniformly dispersed non-stick film-forming substance, thereby facilitating the manufacture of a primer modified layer with good non-stick uniformity.

[0080] In some embodiments, the polyamide-imide resin in the base oil has a particle size of 15-20 nanometers, and the polyethersulfone resin in the base oil has a particle size of 15-20 nanometers. These resins, acting as reinforcing materials in the base oil, are of such a size that facilitates uniform dispersion in the base oil, forming a base oil for uniform dispersion of the reinforcing material, thereby facilitating the manufacture of a base oil modified layer with stable strength. Furthermore, these resin particles form a base oil modified layer with a nanoscale uneven bonding surface, providing a lotus leaf-like papillary structure for the topcoat layer, thereby enhancing the non-stickiness of the topcoat layer.

[0081] According to this application, the primer includes, in addition to the composite material, polyamide-imide resin, polyethersulfone resin, and dispersion solution, fillers and / or dispersing agents. Fillers can increase the roughness, hardness, and abrasion resistance of the primer-modified layer formed by the primer, while reducing costs. Dispersing agents are used to uniformly disperse solid particles (such as resin, fillers, etc.) in the dispersion solution, preventing particle agglomeration, thereby improving the primer's flowability and workability, and ensuring the basic properties of the formed primer-modified layer. After application, the dispersion solution and dispersing agents evaporate, leaving other solid components to form the primer-modified layer.

[0082] As specific examples, when the base oil is modified polyaryletherketone, a first liquid silicone oil, polyamide-imide resin, polyethersulfone resin, filler, dispersant, and dispersion solution, the polyamide-imide resin, polyethersulfone resin, filler, dispersant, and the composite material composed of modified polyaryletherketone and the first liquid silicone oil are uniformly dispersed in the dispersion solution. The weight ratio of the dispersion solution, modified polyaryletherketone, first liquid silicone oil, polyamide-imide resin, polyethersulfone resin, filler, and dispersant is (55-75):(20-30):(3-6):(3-5):(3-5):(3-10):(5-10). It should be noted that the base oil of this application may also include only one of the filler and dispersant, and the corresponding ratio can be as described above.

[0083] In these embodiments, each component has a suitable weight ratio, which helps to balance workability, mechanical properties, wear resistance and high temperature stability, resulting in a base oil with excellent properties.

[0084] In some embodiments, the filler includes at least one selected from carbon black, silicon carbide, titanium dioxide, and alumina, which enables the base oil modified layer to possess enhanced hardness, wear resistance, and thermal stability. In a preferred embodiment, the filler has a nanoscale size, which provides numerous bonding sites, thereby ensuring the adhesion between the base oil modified layer and the appliance substrate. As an example, the filler particle size is 15-20 nanometers.

[0085] In some embodiments, the dispersant in the primer is at least one selected from isopropanol (emulsifier), pyrrolidone (surfactant), and associative polyurethane (thickener). This improves the dispersibility of the primer and ensures its dispersibility after long-term storage. Isopropanol has good solubility and volatility; as a dispersant, it helps to uniformly disperse fillers in various resins, improving the stability and workability of the primer. Pyrrolidone is a polar solvent with good solubility for many organic substances and also has a certain dispersing ability. When used in combination with isopropanol, it can further improve the uniformity of solid particle dispersion in the primer.

[0086] In some embodiments, the dispersion solution is water, which is readily available and facilitates adjustment of the base oil viscosity. As a specific example, measured using a Yantian No. 2 cup, the base oil viscosity is 12-25 seconds. This viscosity provides good fluidity, allowing the base oil to better penetrate the micropores of the substrate. Through a tenon-and-mortise joint-like connection, it enhances the adhesion between the coating and the substrate. Simultaneously, the lower viscosity base oil allows for uniform and rapid application to the surface of the appliance substrate during construction, reducing the formation of bubbles and pinholes, thereby ensuring the quality of the base oil-modified layer.

[0087] According to a second aspect of the present application, a method for manufacturing a base oil is provided. The method includes: step S101, providing polyaryletherketone particles with a porous structure; step S102, activating the polyaryletherketone particles with a porous structure to graft polycondensable groups onto the polyaryletherketone particles with a porous structure, thereby forming a modified polyaryletherketone; and step S103, forming a second mixed slurry comprising liquid silicone oil, modified polyaryletherketone, polyamide-imide resin, polyethersulfone resin, and a dispersion solution, wherein at least a portion of the liquid silicone oil is composited on the modified polyaryletherketone to form a composite material, thereby obtaining a base oil in which the composite material, polyamide-imide resin, and polyethersulfone resin are respectively dispersed in a dispersion solution. According to the method for manufacturing a base oil modified layer provided in the embodiments of this application, the base oil obtained by this preparation method has a non-stick film-forming substance (main non-stick component)-composite material. The modified polyaryletherketone particles in the base oil are cross-linked by polycondensable groups to form a uniform and dense first cross-linked product layer, which provides a good connection framework for the base oil modified layer. In addition, the first cross-linked product layer itself has certain long-lasting non-stick and high-temperature non-stick properties, and can facilitate the composite liquid silicone oil, promoting the continuous and stable release of liquid silicone oil. Thus, while ensuring the transition connection function of the base oil modified layer, it can exhibit certain long-lasting non-stick and high-temperature non-stick properties.

[0088] Furthermore, the dispersion solution allows for thorough mixing of liquid silicone oil and modified polyaryletherketone (PAEK), forming a homogeneous mixture that is less prone to stratification or particle agglomeration. This avoids the uneven dispersion caused by the polarity difference between the liquid silicone oil and modified PAEK, and the stratification of heterogeneous mixtures formed by silicone oil coating PAEK particles. Additionally, the dispersion solution can reduce the viscosity of the mixture and, through solvation, coat the particle surface, reducing interparticle interactions and promoting uniform dispersion.

[0089] The method for manufacturing the base oil according to this application will be described in detail below.

[0090] According to this application, in step S101, polyaryletherketone particles with a porous structure are provided.

[0091] Provide polyaryletherketone resin According to this application, the polyaryletherketone resin is a solid resin particle, specifically including at least one of polyetherketone resin particles, polyetheretherketone resin particles, polyetherketone resin particles, polyetherketone resin particles, and polyetherketone etherketone resin particles. These resin particles can combine the advantages of wear resistance, food safety, and low cost.

[0092] In some embodiments, the polyaryletherketone resin is in particulate form with a particle size of 20 nanometers to 100 nanometers. Due to its small size, it is easy to dissolve and form a mixed slurry with high dispersion, thus laying the groundwork for the subsequent formation of polyaryletherketone particles with a porous structure.

[0093] Forming a mixed slurry According to the method for manufacturing the base oil of this application, a mixed slurry comprising polyaryletherketone resin and solvent is provided. The step includes forming the mixed slurry, which includes ball milling the polyaryletherketone resin and solvent together.

[0094] Specifically, in the mixed slurry, polyaryletherketone (PAEK, such as PEEK, PEKK, etc.) resin exists in the solvent in a partially dissolved and partially dispersed composite form, forming a suspension-like mixed slurry. In other words, in the mixed slurry, a portion of the PAEK resin is dissolved in the solvent, while the other portion is dispersed in the solvent in particulate form, thus obtaining a suspension-like mixed slurry.

[0095] In these embodiments, the polyaryletherketone resin exists in the solvent in a partially dissolved and partially dispersed composite form, which is beneficial for viscosity control of the mixed slurry.

[0096] In an exemplary embodiment, the weight ratio of polyaryletherketone resin to solvent is (5-25):(70-94). This allows the polyaryletherketone resin to be fully dissolved or swollen to form a mixed slurry. Furthermore, while ensuring dispersibility, the viscosity of the mixed slurry can be controlled within the viscosity range applicable to the composite spray drying equipment. This allows the droplets formed by subsequent spraying of the mixed slurry to form polyaryletherketone particles with the desired pore structure due to the evaporation of the solvent.

[0097] According to this application, the solvent includes soluble solvents and insoluble solvents. As an example, soluble solvents include at least one of hexafluoroisopropanol, N-methylpyrrolidone, and dimethyl sulfoxide, and insoluble solvents may be water.

[0098] In some embodiments, the mixed slurry may further include a foaming agent, with the weight ratio of polyaryletherketone resin, solvent, and foaming agent being (5-25):(70-94):(1-5). A specific method for preparing the mixed slurry includes mixing and fully dissolving the polyaryletherketone resin with a soluble solvent to form a mixed slurry with a solid content of 5-25%, placing it in a sealed container, then purging the sealed container with nitrogen for protection, and continuously stirring at a stirring speed of 100-200 rpm for 2-4 hours. Subsequently, 1%-5% of a foaming agent (such as ammonium bicarbonate) is added to promote sufficient foaming of the droplets formed by spraying the mixed slurry during the subsequent drying stage, thereby obtaining polyaryletherketone particles with a porous structure. It should be noted that although in this example the foaming agent is added after mixing the polyaryletherketone resin and the soluble solvent, this application does not limit the order of addition of the foaming agent. For example, in some embodiments, the polyaryletherketone resin, the soluble solvent, and the foaming agent may be added simultaneously.

[0099] In these embodiments, the mixed slurry contains a foaming agent, which facilitates the opening of pores inside the swollen polyaryletherketone resin, resulting in a more uniform and numerous pore structure in the final polyaryletherketone particles, thus paving the way for subsequent activation treatment and silicone oil filling.

[0100] In some embodiments, the blowing agent includes at least one of ammonium bicarbonate, sodium bicarbonate, azodicarbonamide, and supercritical CO2, which have the advantages of both good foaming ability and low cost.

[0101] Spray drying to form polyaryletherketone particles with a porous structure According to this application, the step of providing polyaryletherketone (PAEK) particles with a porous structure includes: providing a mixed slurry comprising PAEK resin and a solvent; and performing spray drying on the mixed slurry to obtain PAEK particles with a porous structure. That is, the solid PAEK resin is porousized, thereby paving the way for subsequent activation treatment and silicone oil filling.

[0102] In some embodiments, the mixed slurry forms micron-sized droplets during spray drying, which have an evaporation rate 1,000 to 1 million times greater than that of millimeter-sized droplets. This droplet size promotes the evaporation of droplets during the subsequent spray drying process and is more conducive to the formation of polyaryletherketone particles with a porous structure.

[0103] In some embodiments, the parameters of the spray drying equipment are adjusted, such as adjusting the rotation speed of the rotary atomizer or the pressure of the dual-fluid nozzle, to adjust the formation of droplets of 1 micrometer to 100 micrometers, thereby facilitating the formation of pores and constructing a porous structure.

[0104] As a specific example, a suitable atomizing and drying equipment is selected based on the viscosity of the mixed slurry and the required droplet size. Then, the feed rate of the mixed slurry (20 mL / min-30 mL / min) is controlled by the peristaltic pump of the equipment, conveying the slurry into the atomizing tower. The rotation speed of the rotary atomizer is adjusted to form droplets of 1 micrometer to 100 micrometers. The droplets are then rapidly dried at an inlet temperature of 150℃-250℃ (above the solvent boiling point, below the melting point of PAEK) and an outlet temperature of 100℃-150℃, with a flow rate of 1 m³ / min. 3 / min-2m 3 A protective gas (nitrogen) is supplied at a rate of / min to prevent oxidation of the polyaryletherketone resin, accelerate solvent evaporation (the solvent can be recycled), and prevent particle adhesion.

[0105] In these embodiments, an inlet temperature of 150°C-250°C promotes rapid evaporation of the solvent on the droplet surface (>90% by weight of solvent is removed at this stage), resulting in a sharp increase in surface concentration. This causes the polyaryletherketone resin to rapidly precipitate and solidify, forming a dense, hard shell. Simultaneously, the hard shell hinders the outward diffusion of the internal solvent, creating a pressure gradient between the inside and outside. The internal pressure pushes the shell layer outward. Once the internal solvent has completely evaporated, the shell layer contracts inward due to surface tension, forming a hollow structure (porosity 30%-70%). Furthermore, during this process, solvent evaporation also creates pores on the outer wall and inside of the particle. An outlet temperature of 100°C-150°C promotes the slow evaporation of residual solvent (<10%) and prevents the accumulation of internal stress that could lead to the collapse of the hollow structure.

[0106] In this application, the polyaryletherketone particles with a porous structure not only have multiple pores on their outer wall surface, but also have large pores in the center. As a specific example, the porosity of the polyaryletherketone particles with a porous structure according to this application is 35%-75%, and the pore size is 10 nanometers-120 nanometers.

[0107] Cleaning and drying are performed to obtain polyaryletherketone particles with a porous structure. According to this application, the obtained polyaryletherketone particles with a porous structure are washed to remove solvent, so as to prevent the polyaryletherketone resin from dissolving during subsequent use, and then dried for later use, thereby obtaining polyaryletherketone particles with a porous structure.

[0108] Figure 1 A schematic diagram of the structure of polyaryletherketone particles with a porous structure provided according to an exemplary embodiment of this application is shown. Figure 1 It can be roughly seen that the polyaryletherketone particles have a distinct porous structure, and the pores in the porous structure are generally evenly distributed.

[0109] According to this application, the pores in the polyaryletherketone particles with a porous structure formed by spray drying are mostly open pores or interconnected pores, i.e., through pores, while a small number are closed pores. As an example, the volume percentage of through pores is approximately 85%-95%, with the remainder being closed pores.

[0110] Activation treatment yields modified polyarylether ketone. According to this application, an activation treatment is performed to graft polycondensable groups onto polyaryletherketone (PAE) particles with a porous structure, thereby obtaining modified PAEs. On one hand, the modified groups on the PAEs can provide crosslinking anchor points for crosslinking between the individual PAE particles in the subsequent modified coating, thus forming a network structure as a non-stick skeleton for the layered structure, ensuring the basic non-stickiness, wear resistance, density, and oil retention capacity of the layered structure. On the other hand, the network structure formed by the modified PAEs can serve as an adsorption carrier for silicone oil, and can ensure that liquid silicone oil is continuously released at a stable rate in the final layered structure, further improving durable non-stickiness and high-temperature non-stickiness. Here, the polycondensable groups can interconnect through a polycondensation reaction (i.e., a polymerization reaction that forms high molecular chains by removing small molecule byproducts such as water, alcohol, and ammonia) in the high-temperature environment of the subsequently formed layered structure to form a crosslinked product layer with a network structure, and maintain a certain stability at low temperatures, serving as a carrier for liquid silicone oil in the modified coating. As an example, the polycondensable groups include at least two active functional groups selected from sulfonic acid (-SO3H), nitro (-NO2), hydroxyl (-OH), carboxyl (-COOH), and amino (-NH2), or active functional groups having hydroxyl or amino groups. Among these polycondensable groups, hydroxyl (-OH), carboxyl (-COOH), and amino (-NH2) are more lipophilic (especially with non-polar or weakly polar oils such as liquid silicone oils), while sulfonic acid (-SO3H) and nitro (-NO2) have weaker lipophilicity and may even repel oil molecules due to their strong polarity or negative charge. Therefore, when selecting silicone oils, hydroxyl silicone oils with small molecular weight, low degree of polymerization, and active groups on the surface are preferred. As an example, the molecular weight of hydroxyl silicone oil can be 5000-50000.

[0111] In some embodiments, the activation treatment includes at least one of sulfonation, nitration, plasma treatment, corona treatment, and laser etching. Sulfonation and nitration are chemical treatments. Through the above activation treatments, corresponding polycondensable groups can be grafted onto the polyaryletherketone particles to increase the activity of the modified polyaryletherketone. This facilitates the cross-linking of adjacent modified polyaryletherketones in the subsequent modified coating during the high-temperature sintering stage, thereby promoting the formation of a network structure in the modified layer and continuously locking in the liquid silicone oil to achieve durable non-stick and high-temperature non-stick properties.

[0112] In some embodiments, a single activation treatment or two different activation treatments may be performed to graft at least two polycondensable groups onto the same porous polyaryletherketone particle. In this application, the grafting sites of the polycondensable groups can be on any benzene ring of the porous polyaryletherketone particle molecule, and at any position on the respective benzene ring.

[0113] The following will describe in detail the four specific activation treatment methods.

[0114] In the first embodiment, the surface energy of the polyaryletherketone particles can be significantly improved by sulfonating the modified polyaryletherketone to introduce highly polar sulfonic acid groups.

[0115] A specific example of the sulfonation process is as follows: Porous polyaryletherketone (PAEK) particles are immersed in concentrated sulfuric acid with a concentration of 98% or higher, and the mixture is stirred at 80°C–120°C for 3–5 hours. During the reaction, sulfonic acid groups are gradually grafted onto the surface and pore walls of the PAEK particles. After sulfonation, a post-treatment step is also included. For example, the particles are washed with deionized water until neutral to remove residual sulfuric acid, and then vacuum dried at 60°C–70°C for 10–14 hours to obtain the sulfonated modified PAEK.

[0116] In the second embodiment, the surface of polyaryletherketone is bombarded with low-temperature plasma (such as oxygen or ammonia plasma) to generate free radicals and initiate an oxidation reaction, producing active functional groups such as hydroxyl (-OH), carboxyl (-COOH), and amino (-NH2) groups, which serve as modified polyaryletherketone. Oxygen can introduce hydroxyl (-OH) and carboxyl (-COOH) groups, while ammonia can introduce amino (-NH2) groups.

[0117] In the third embodiment, by nitration treatment, grafting nitro-NO2 can increase the surface polarity of the modified polyaryletherketone. At the same time, the nitro group can be reduced to amino (-NH2). The basicity of the amino group can enhance the electrostatic interaction with liquid silicone oil, increasing the oil-locking capacity by 20-40%. It can also participate in polycondensation reactions (such as amidation) as a polycondensable group to form a polyamide crosslinking network.

[0118] The specific steps of the nitration treatment are as follows: Porous polyaryletherketone (PAE) particles can be immersed in a mixed acid (HNO3:H2SO4 = 1:3 volume ratio) and stirred at 0°C for 2-3 hours. During this process, nitro groups preferentially graft onto electron-rich regions (such as the ortho-position of ether bonds) on the surface of the PAE particles. After washing the nitrated particles with deionized water, they are immersed in a 3%-6% SnCl2 / HCl solution and reduced at 70°C-80°C for 3-5 hours to convert the nitro groups to amino groups. After the reaction, the mixture is neutralized with ammonia water to pH=7. The resulting aminated PAE particles, after washing and drying, are used as modified PAEs.

[0119] In the fourth embodiment, corona treatment generates high-energy ions, free radicals, and ozone during corona discharge. These active ions bombard the porous polyaryletherketone particles, thereby allowing hydroxyl (-OH) or carboxyl (-COOH) groups to be grafted onto the benzene ring or carbonyl position of the porous polyaryletherketone particles. (Refer to...) Figure 3 .

[0120] The specific execution parameters are: voltage 20kV-30kV, frequency 20kHz-30kHz, electrode spacing 1mm-2mm, and processing time 5-10 seconds / cycle. Environmental control: air humidity <60%, temperature 20℃-30℃ (to avoid excessive ozone decomposition).

[0121] The modified polyaryletherketone according to this application can exist stably in the base oil in a chemically active form, and can form a corresponding crosslinked product layer through crosslinking during the high-temperature sintering process of the base oil forming layer, thereby constituting the main structure of the base oil modified layer and locking liquid silicone oil.

[0122] According to the method for manufacturing modified polyaryletherketone of this application, the obtained modified polyaryletherketone can also be screened to improve the uniformity of the modified polyaryletherketone used, thereby further improving the uniformity of the final non-stick layer.

[0123] According to this application, in step S103, liquid silicone oil, modified polyaryletherketone, polyamide-imide resin, polyethersulfone resin, and dispersion solution are mixed to form a base oil.

[0124] Mixed base oil According to this application, a first mixed slurry is formed by mixing liquid silicone oil, modified polyaryletherketone, polyamide-imide resin, polyethersulfone resin, and a dispersion solution. In the first mixed slurry, at least a portion of the liquid silicone oil (i.e., the first liquid silicone oil) is composited on the modified polyaryletherketone to form a composite material, thereby obtaining a base oil comprising a composite material dispersed in the dispersion solution.

[0125] In this application, the various components of the base oil are mixed in multiple ways. The following will describe the various components of the base oil according to this application with specific examples.

[0126] As a specific example, the components of the base oil can be mixed by stirring modified polyaryletherketone, liquid silicone oil, and a dispersion. At least a portion of the liquid silicone oil is composited (coated, adsorbed, etc.) onto the modified polyaryletherketone to form a composite material, thereby obtaining an oil-storing active body. The weight ratio of the modified polyaryletherketone, liquid silicone oil, and dispersion is (35-55):(15-20):(20-60), and the stirring time is 6-12 hours. It should be noted that the oil-storing active body can be stored at 5-10°C for later use. The dispersion here has the properties described in the above examples.

[0127] As an example, the dispersion uses at least one of a non-soluble solvent, such as water, and an organic solvent that does not dissolve the modified polyaryletherketone. Additionally, a cationic surfactant may be dispersed in the dispersion (e.g., at 4-4.5% of the total weight of the dispersion) to promote the dispersion of unadsorbed liquid silicone oil in the liquid base oil.

[0128] In these embodiments, the dispersion liquid ensures thorough mixing of the liquid silicone oil and modified polyaryletherketone (PAEK), forming a homogeneous mixture that is less prone to stratification or particle agglomeration. This avoids uneven dispersion caused by the polarity difference between the liquid silicone oil and the modified PAEK, and the tendency for heterogeneous mixtures to stratify due to silicone oil coating PAEK particles. Furthermore, the dispersion liquid can reduce the viscosity of the mixture and, through solvation, coat the particle surface, reducing interparticle interactions and promoting uniform dispersion.

[0129] Next, the polyamide-imide resin and polyethersulfone resin are dispersed in a second dispersing solvent to obtain a second mixture. Then, the oil-storing active body is mixed with the obtained second mixture to form a second mixed slurry, which serves as the base oil according to this application. It should be noted that in the process of manufacturing the base oil, the dispersion and the second dispersing solvent used can be the same or different, and both the dispersion and the second dispersing solvent serve as the dispersion solution in the resulting base oil. Furthermore, it should be noted that for base oils containing dispersing agents and / or fillers, the dispersing agents and / or fillers can be pre-mixed in the aforementioned dispersion and second dispersing solvent, and then the base oil can be formed in the same manner.

[0130] In this application, the aforementioned oil-retaining active body can be used directly, or it can be dried to a slightly viscous state for later use. Therefore, for ease of description, in the liquid oil-retaining active body, the liquid silicone oil bonded / adsorbed on the surface of the modified polyaryletherketone and adsorbed in the porous structure of the modified polyaryletherketone is referred to as the first liquid silicone oil, and the liquid silicone oil dispersed in the oil-retaining active body is referred to as the second liquid silicone oil. Alternatively, if the oil-retaining active body is dried to a slightly viscous state for later use, it can be directly dispersed in the aforementioned second mixture to obtain a base oil.

[0131] In the above embodiments, by preparing an oil-retaining active body from modified polyarylether ketone and liquid silicone oil, it can be applied to some non-stick coatings with poor non-stick properties in the prior art, so as to improve the overall non-stick properties of non-stick coatings for appliances.

[0132] Figure 2 A schematic diagram illustrating the formation principle of the composite material in an oil-storing active body provided according to an exemplary embodiment of this application is shown. Figure 2 As shown, the composite material is formed by combining modified polyaryletherketone and first liquid silicone oil.

[0133] In addition to the methods described above, the mixture of the various components of the base oil of this application can also be achieved through the following methods.

[0134] In some embodiments, liquid silicone oil, modified polyaryletherketone, polyamide-imide resin, polyethersulfone resin, and dispersion solution can be directly mixed, allowing at least a portion of the liquid silicone oil to composite (coat, adsorb, etc.) onto the modified polyaryletherketone to form a composite material, thereby obtaining a base oil in which the composite material, polyamide-imide resin, and polyethersulfone resin are dispersed in the dispersion solution. Here, the mixing method can be conventional mechanical stirring or other methods.

[0135] According to this application, the liquid silicone oil is methyl silicone oil or hydroxyl silicone oil. In a preferred embodiment, the liquid silicone oil is hydroxyl silicone oil, as the hydroxyl groups are highly compatible with the active functional groups of the modified polyaryletherketone, forming a more robust adsorption.

[0136] In some embodiments, the base oil can be deposited on the surface of a product (e.g., cookware substrate, cup substrate) by spray drying or impregnation. During the spraying process to form the base oil modified layer, the dispersion solution and dispersing aids evaporate, and the polyamide-imide resin and polyethersulfone resin physically crosslink, forming a denser and tougher network structure. The composite material can be uniformly dispersed in the network structure of the crosslinked product and further crosslinked with it. The filler is dispersed in the formed crosslinked product, thereby obtaining a base oil modified layer with good strength, certain non-stickiness, bonding force, heat resistance and corrosion resistance.

[0137] The following describes in detail a method for manufacturing a non-stick appliance according to an embodiment of this application.

[0138] According to a third aspect of this application, a method for manufacturing a non-stick appliance is provided, wherein the method includes: step S201, providing an appliance substrate; step S202, providing a first mixed slurry as a base oil; in step S202, the first mixed slurry includes a dispersion solution, a composite material, a polyamide-imide resin, and a polyethersulfone resin, wherein the composite material, the polyamide-imide resin, and the polyethersulfone resin are dispersed in the dispersion solution, and the composite material is a material comprising modified polyaryletherketone and a first liquid silicone oil; step S203, spraying the base oil onto the appliance substrate and curing it to form a base oil modified layer with an uneven bonding surface; step S204, providing a second mixed slurry as a top oil; in step S204, the second mixed slurry includes a dispersion medium and a composite material dispersed in the dispersion medium, wherein the composite material is a material comprising modified polyaryletherketone and a first liquid silicone oil. Step S205: After spraying a top coat onto the base oil modified layer, sintering is performed to form a top oil modified layer with an uneven surface on the base oil modified layer, thereby manufacturing a non-stick appliance.

[0139] According to the non-stick appliance manufacturing method provided in the embodiments of this application, a first mixed slurry formed by a dispersion solution, a composite material, a polyamide-imide resin, and a polyethersulfone resin is used as a base oil. The base oil is atomized and sprayed to form a base oil modified layer of the appliance with an uneven bonding surface. By using a dispersion medium and a composite material dispersed in the dispersion medium as non-stick film-forming substances in the top oil, the top oil modified layer formed by atomized spraying of the top oil can, in conjunction with the base oil modified layer with an uneven bonding surface, correspondingly exhibit a similar uneven morphology (for example, the base oil modified layer has a nanoscale uneven bonding surface, and correspondingly, the top oil modified layer has a nanoscale uneven surface). Therefore, the two work together to further improve the long-lasting non-stick and high-temperature non-stick performance.

[0140] In addition, the base oil modified layer and the top oil modified layer also include composite materials. The composite materials in the base oil can be linked with the composite materials in the top oil through cross-linking, thereby further improving the interlayer bonding force of the base oil modified layer and the top oil modified layer.

[0141] The following describes a method for manufacturing a non-stick appliance according to this application, with specific steps.

[0142] Provide appliance base According to the present invention, the appliance substrate has a substrate structure comprising a receiving cavity formed by stretching or spinning a metallic material. As examples, the metallic material includes magnesium, aluminum, iron, or titanium.

[0143] In some embodiments, the thickness of the appliance substrate is d1, wherein 1.0 mm ≤ d1 ≤ 2.0 mm, and such a thickness can reduce the weight of the final manufactured appliance.

[0144] According to some embodiments of this application, the bonding surface between the appliance substrate and the base oil modification layer is a micron-level rough surface. The base oil modification layer and the top oil modification layer are sequentially and conformally disposed on the appliance substrate. In this way, the rough surface of the appliance substrate can be used to further refine the nano-level uneven surface of the top oil modification layer, enrich the oil storage structure, and further improve the long-lasting non-stick and high-temperature non-stick properties.

[0145] In some embodiments, the bonding surface between the utensil substrate and the base oil modified layer has an uneven structure consisting of protrusions and grooves. The base oil modified layer and the top oil modified layer are sequentially filled in the grooves of the uneven structure to create a patterned non-stick pan, thereby meeting the usage needs of different users.

[0146] Formation of base oil modified layer In some embodiments, a base coat reinforced wet film with a thickness of 16-31 micrometers is formed by atomizing the base coat. Specifically, the nozzle diameter of the atomizing spray gun is 1.0-1.5 mm, the atomizing pressure is 2.5-3.0 Bar, the distance is 20-35 cm, and the time is 2-5 seconds.

[0147] In some embodiments, the primer-reinforced wet film obtained by atomized spraying is surface-dried to obtain a surface-dried primer-modified layer. As an example, the surface-drying temperature is 120°C-200°C, and the surface-drying time is 3 min-5 min.

[0148] According to this application, the formed base oil modified layer has a nanoscale uneven bonding surface, which is mainly formed by the accumulation of individual particles in the base oil during the formation of the base oil modified layer. In some embodiments, the surface of the appliance substrate connected to the base oil modified layer has a micron-level unevenness. The roughness Ra is 10-15 microns, which further refines the nanoscale uneven bonding surface of the base oil modified layer, resulting in a correspondingly finer nanoscale unevenness in the top oil modified layer. This allows the non-stick requirements of the appliance to be met even when only polyaryletherketone resin is used as the non-stick film-forming material for the top oil.

[0149] According to this application, the base oil modified layer has a network structure and is formed from the base oil in the above embodiments. The base oil includes a dispersion solution, a composite material, a polyamide-imide resin, and a polyethersulfone resin. The composite material, the polyamide-imide resin, and the polyethersulfone resin are dispersed in the dispersion solution. The composite material is a material comprising modified polyaryletherketone and a first liquid silicone oil, wherein the modified polyaryletherketone is a polyaryletherketone resin grafted with polycondensation-capable groups. Correspondingly, the base oil modified layer includes a first crosslinking product layer and liquid silicone oil composited on the first crosslinking product layer. The first crosslinking product layer includes a mixed layer of a first crosslinking product and a second crosslinking product. The first crosslinking product is a crosslinking product of the polyamide-imide resin and the polyethersulfone resin, and the second crosslinking product is a crosslinking product between the particles of the modified polyaryletherketone, wherein the modified polyaryletherketone is a polyaryletherketone resin grafted with polycondensation-capable groups. Here, the crosslinking product of the polyamide-imide resin and the polyethersulfone resin is obtained by crosslinking the polyamide-imide resin and the polyethersulfone resin in the base oil. When polyamide-imide resin and polyethersulfone resin crosslink, a denser and tougher network structure can be formed. Modified polyaryletherketone can be uniformly dispersed in the network structure of the crosslinked products of polyamide-imide resin and polyethersulfone resin and further crosslinked, thereby improving the overall density of the base oil modified layer and facilitating the locking and continuous stable release of liquid silicone oil.

[0150] In some embodiments, the first crosslinked product layer comprises a crosslinked product having at least one chemical bond selected from ester bonds, aliphatic ethers, aromatic ethers, amide bonds, aromatic amines, sulfonates, and sulfonamides, and having a benzene ring, a carbonyl group, and a carbon-carbon bond.

[0151] In these embodiments, different chemical bond types allow for targeted performance optimization (e.g., increasing the proportion of ester bonds to improve hardness, or introducing more ether bonds to enhance toughness) to meet the needs of different application scenarios. For example, the product layer contains ester / amide bonds, which provide hydrogen bonding, enhance intermolecular bonding, and improve the hardness and heat resistance of the product layer. The presence of aromatic amines / sulfonamides introduces a rigid structure, improving the mechanical strength and creep resistance of the product layer. Sulfonate esters improve the polarity and solubility of the material, facilitating compounding with other components. Furthermore, the benzene ring, carbonyl group, and carbon-carbon bonds are inherent to polyaryletherketones, forming the basis for the product layer's superior properties compared to polyaryletherketone resins.

[0152] As examples, crosslinked products with ester bonds are formed by esterification of hydroxyl-modified polyarylether ketones and carboxyl-modified polyarylether ketones; crosslinked products with aliphatic ethers are formed by polycondensation of multiple hydroxyl-modified polyarylether ketones; crosslinked products with aromatic ethers are formed by crosslinking of carboxyl-modified polyarylether ketones and amino-modified polyarylether ketones; crosslinked products with amide bonds are formed by crosslinking of hydroxyl-modified polyarylether ketones and nitro-modified polyarylether ketones; crosslinked products with aromatic amines are formed by crosslinking of amino-modified polyarylether ketones and nitro-modified polyarylether ketones; crosslinked products with sulfonates are formed by crosslinking of hydroxyl-modified polyarylether ketones and sulfonic acid-modified polyarylether ketones; and crosslinked products with sulfonamides are formed by crosslinking of amino-modified polyarylether ketones and sulfonic acid-modified polyarylether ketones.

[0153] As an example, Figure 4 and Figure 5 The crosslinked products shown in the examples are crosslinked products with ester bonds.

[0154] In some embodiments, the weight ratio of the first crosslinking product layer to the liquid silicone oil is (26-40):(4-8). The two work synergistically to form a stable base oil modified layer, so as to ensure the transition connection function of the base oil modified layer while making it exhibit certain long-lasting non-stick and high-temperature non-stick properties.

[0155] In some embodiments, the weight ratio of the first crosslinking product (the crosslinking product of polyamide-imide resin and polyethersulfone resin) to the second crosslinking product (the interparticle crosslinking product of modified polyaryletherketone) in the first crosslinking product layer is (6-10):(20-30).

[0156] In these embodiments, the first crosslinking product layer is mainly composed of crosslinking products between modified polyaryletherketone particles, supplemented by crosslinking products of polyamide-imide resin and polyethersulfone resin. This fully utilizes the properties of modified polyaryletherketone similar to those of polyaryletherketone resin, resulting in a first crosslinking product layer with excellent resistance to mechanical impact, hardness, and self-lubricating properties. Consequently, the first crosslinking product layer possesses certain long-lasting non-stick properties, high-temperature non-stick properties, and durability.

[0157] In some embodiments, the base oil modified layer further includes filler, and the filler and hydraulic silicone oil are dispersed in the base oil modified layer. The weight ratio of the first crosslinking product layer, liquid silicone oil and filler is (26-40):(4-8):(3-10). The filler enables the formed base oil modified layer to have obvious roughness, thereby improving the bonding performance with its directly bonded layer or appliance substrate (layer, for example, may be top oil modified layer, appliance substrate, for example, may be cookware substrate) due to the roughness, and can improve the hardness and wear resistance of the base oil modified layer, and can reduce costs.

[0158] In these embodiments, the base oil modification layer is a mixture of multiple materials, which can combine the advantages of each material to achieve excellent thermal stability, mechanical strength and chemical inertness.

[0159] In some embodiments, the filler in the base oil modified layer includes at least one of carbon black, silicon carbide, titanium dioxide, and alumina. These fillers enable the base oil modified layer to possess enhanced hardness, wear resistance, and thermal stability. It should be noted that when multiple fillers are included, this application does not limit the mixing ratio of the various substances.

[0160] In some embodiments, the thickness of the base oil modified layer is 15 micrometers to 30 micrometers. This thickness can balance multiple aspects such as bonding strength and enhancement effect, and it is easy to form a uniformly distributed base oil modified layer.

[0161] Forming a surface oil modified layer In some embodiments, a non-stick wet film with a thickness of 18-28 micrometers is formed by atomizing the topcoat. Specifically, the nozzle diameter of the atomizing spray gun is 1.0-1.5 mm, the atomizing pressure is 2.5-3.0 Bar, the distance is 20-35 cm, the time is 2-5 seconds, the curing temperature is 400-410℃, and the holding time is 10-15 minutes.

[0162] sintering According to this application, after obtaining a non-stick wet film of topcoat through atomized spraying, sintering is performed so that the surface-dried base coat modified layer and the non-stick wet film of topcoat are simultaneously sintered and cured, forming a hard and dense coating structure. As an example, the sintering temperature is 390℃-410℃, and the curing time is 5min-10min. Performing sintering at this temperature and time allows the topcoat and base coat to be completely cured into a non-stick layer, facilitating subsequent processing. After sintering, a base coat modified layer with a thickness of 15μm-30μm and a topcoat modified layer with a thickness of 15μm-30μm are obtained.

[0163] appliance According to this application, the appliance includes an appliance substrate and a base oil modified layer and a top oil layer sequentially formed on the surface of the appliance substrate, wherein the top oil layer is a base oil layer in the prior art, or it may be a top oil modified layer with modified polyaryletherketone.

[0164] In some embodiments, the appliance may be a household appliance, specifically a frying pan, a rice cooker inner pot, a cup, a kettle, or a knife.

[0165] The beneficial effects of the present invention will be described below with reference to specific examples.

[0166] Example 1 The cookware of Example 1 is formed by the following method.

[0167] S401 provides a 2mm cookware base.

[0168] S402 is a primer coating formed by dispersing a composite material of modified polyaryletherketone (POP) with a particle size D50 of 100-150 nm, liquid hydroxyl silicone oil, polyamide-imide resin, and polyethersulfone resin in isopropanol. This primer coating is then atomized and sprayed onto a cookware substrate (1.3 mm nozzle diameter, 3.0 Bar pressure, 30 cm distance, 3 seconds). The substrate is then sintered at 400°C for 8 minutes to cure, thus forming a thick primer on the cookware substrate. A base oil modification layer with a thickness of 25 micrometers is used to obtain the cookware provided according to Example 1 of this application, wherein the weight ratio of modified polyaryletherketone, hydroxyl silicone oil, polyamide-imide resin, polyethersulfone resin and isopropanol is 25:5:4:4:60, the selected modified polyaryletherketone is hydroxyl-modified with a cross-sectional porosity of 50% and a pore size of 50nm-80nm, and the liquid silicone oil is hydroxyl silicone oil with a molecular weight of 10000, thereby obtaining the cookware of Example 1.

[0169] Example 2 Except for step S402, in which different modified polyaryletherketones are used (in this embodiment, the modified polyaryletherketones are carboxyl-modified polyetheretherketones and amino-modified polyetheretherketones), the cookware of Example 2 according to this application is formed using the same method as in Example 1.

[0170] Example 3 Except for step S402, in which different modified polyaryletherketones are used (in this embodiment, the modified polyaryletherketones are nitro-modified polyetheretherketones and amino-modified polyetheretherketones), the cookware of Example 3 according to this application is formed using the same method as in Example 1.

[0171] Example 4 Except for step S402, in which different modified polyaryletherketones are used (in this embodiment, the modified polyaryletherketones are hydroxyl-modified polyetheretherketones and carboxyl-modified polyetheretherketones), the cookware of Example 4 according to this application is formed using the same method as in Example 1.

[0172] Example 5 Except for step S402, in which different modified polyaryletherketones are used (in this embodiment, the modified polyaryletherketones are sulfonic acid-modified polyetheretherketones and amino-modified polyetheretherketones), the cookware of Example 5 according to this application is formed using the same method as in Example 1.

[0173] Example 6 Except for step S402, in which different modified polyaryletherketones are used (in this embodiment, the modified polyaryletherketones are carboxyl-modified polyetheretherketones and amino-modified polyetheretherketones), the cookware of Example 6 according to this application is formed using the same method as in Example 1.

[0174] Example 7 Except for using a different modified polyaryletherketone in step S402 (the modified polyaryletherketone in this embodiment is an amino-modified polyetheretherketone), the cookware of Example 7 according to this application is formed using the same method as in Example 1.

[0175] Example 8 Except for step S402, in which a different modified polyaryletherketone is used (in this embodiment, the modified polyaryletherketone is a polyetheretherketone with a porosity of 50% and a pore size of 80nm-120nm), the cookware of Example 8 according to this application is formed using the same method as in Example 1.

[0176] Example 9 Except for step S402, in which a different modified polyaryletherketone is used (in this embodiment, the modified polyaryletherketone is a polyetheretherketone with a porosity of 50% and a pore size of 20nm-50nm), the cookware of Example 9 according to this application is formed using the same method as in Example 1.

[0177] Example 10 Except for using a different modified polyaryletherketone in step S402 (the modified polyaryletherketone in this embodiment is a polyetheretherketone with a porosity of 60% and a pore size of 50nm-80nm), the cookware of Example 10 according to this application is formed using the same method as in Example 1.

[0178] Example 11 Except for step S402, in which a different modified polyaryletherketone is used (in this embodiment, the modified polyaryletherketone is a polyetheretherketone with a porosity of 70% and a pore size of 50nm-80nm), the cookware of Example 11 according to this application is formed using the same method as in Example 1.

[0179] Example 12 Except for step S402, in which a different modified coating is used (the modified coating in this embodiment is composed of modified polyaryletherketone, hydroxyl silicone oil, polyamide-imide resin, polyethersulfone resin, isopropanol and cationic surfactant, and the weight ratio of modified polyaryletherketone, hydroxyl silicone oil, polyamide-imide resin, polyethersulfone resin, isopropanol and cationic surfactant is 25:5:4:4:60:2.4), the cookware of Example 12 according to this application is formed using the same method as in Example 1.

[0180] Example 13 Except for step S402, where a different modified coating is used (the modified coating in this embodiment is composed of modified polyaryletherketone, hydroxyl silicone oil, polyamide-imide resin, polyethersulfone resin, isopropanol, mica, and pyrrolidone, and the weight ratio of modified polyaryletherketone, hydroxyl silicone oil, polyamide-imide resin, polyethersulfone resin, isopropanol, mica, and pyrrolidone is 25:5:4:4:60:6:8), the cookware of Example 13 according to this application is formed using the same method as in Example 1.

[0181] Example 14 Except for step S402, in which a different modified coating is used (the modified coating in this embodiment is composed of modified polyaryletherketone, hydroxyl silicone oil, polyamide-imide resin, polyethersulfone resin, isopropanol and mica, and the weight ratio of modified polyaryletherketone, hydroxyl silicone oil, polyamide-imide resin, polyethersulfone resin, isopropanol and mica is 25:5:4:4:60:6), the cookware of Example 14 according to this application is formed using the same method as in Example 1.

[0182] Example 15 Except for step S402, in which a different modified coating is used (the modified coating in this embodiment is composed of modified polyaryletherketone, hydroxyl silicone oil, polyamide-imide resin, polyethersulfone resin, isopropanol and pyrrolidone, and the weight ratio of modified polyaryletherketone, hydroxyl silicone oil, polyamide-imide resin, polyethersulfone resin, isopropanol and pyrrolidone is 25:5:4:4:60:8), the cookware of Example 15 according to this application is formed using the same method as in Example 1.

[0183] Example 16 Except for using a different liquid silicone oil in step S402 (the liquid silicone oil in this embodiment is methyl silicone oil with a molecular weight of 15,000), the cookware of Embodiment 16 according to this application is formed using the same method as in Embodiment 1.

[0184] Comparative Example 1 Except in step S402, where solid polyaryletherketone resin particles are used instead of the modified polyaryletherketone in Example 1 (i.e., solid unmodified particles are used instead of the modified polyaryletherketone in Example 1 of this application), the cookware of Comparative Example 1 is formed using the same method as in Example 1.

[0185] Comparative Example 2 Except in step S402, where the modified polyetheretherketone in Example 1 is directly replaced with polyetheretherketone particles with a cross-sectional porosity of 50% and a pore size of 50nm-80nm (i.e., unmodified polyetheretherketone particles with a porous structure are directly used), the cookware according to Comparative Example 2 of this application is formed using the same method as in Example 1.

[0186] Comparative Example 3 Except in step S402, where the modified polyetheretherketone (PEEK) in Example 11 is directly replaced with PEEK particles with a cross-sectional porosity of 70% and a pore size of 50 nm-80 nm (i.e., unmodified PEEK particles with a porous structure are directly used), the cookware according to Comparative Example 3 of this application is formed using the same method as in Example 11.

[0187] The non-stick properties of the cookware in Examples 1-16 and Comparative Examples 1-3 were tested, and the test results are shown in Table 1 below.

[0188] The performance metrics testing methods are as follows: 1. Scratch resistance test: Using the enterprise standard, the product to be tested is placed on a special equipment, and then a 400μm diameter drill bit is placed on the test object. A force from 0 to 50N is applied with an increase of 12000mN / min, and the drill bit is advanced at a speed of 8mm / min. The force required to scratch the material surface to the substrate is observed. The greater the force required, the better the hardness.

[0189] 2. Durable non-stick test method: GB / T32388-2015 Durable non-stick test method, the unit is the number of times. The higher the number of times, the longer the life. 500 times is used to evaluate the non-stick result once. The number of times is recorded until the use reaches level III.

[0190] 3. High-Temperature Test Method: Place the product to be tested in a constant temperature oven at 300±5℃. After the product reaches the set temperature of the oven, put it into a heat preservation state and start timing. After the product has been kept in the oven for 1 hour, remove the product and allow it to cool naturally to room temperature. Test the non-stick properties of the product according to the non-stick test method of GB / T32388-2015 and record the non-stick grade. Repeat the above high-temperature baking and non-stick grade test until the product's non-stick grade reaches Grade III. Record the total cumulative heat preservation time of the product, which is the high-temperature non-stick resistance time. For the high-temperature non-stick resistance time, it is expected that the high-temperature non-stick resistance time of the tested product will reach more than 24 hours.

[0191] 4. Corrosion Resistance Test Method: Prepare a 5% sodium chloride solution. Add the solution to a pot, filling it to 1 / 3 of the pot's volume. Cover and maintain a gentle boil. Observe the pot surface for rust every half hour until obvious rust appears, then stop the experiment. For the corrosion resistance test, it is expected that the tested product will have a corrosion resistance of over 100 hours.

[0192] 5. Cross-cut test method: The test shall be conducted according to the method specified in GB / T 32388. The number of squares of the tested product that fall off shall be determined, and the retention rate shall be calculated. The higher the retention rate, the higher the adhesion. Here, the tested product refers to the coating of the examples and comparative examples.

[0193] II. The test results are shown in Table 1 below.

[0194]

[0195] As can be seen from Table 1: (1) Compared with other coatings without modified polyaryletherketone, the base oil layer of the cookware according to the embodiments of this application has better durability and high-temperature non-stick properties. (2) Comparing Example 1 and Comparative Example 1, the durability and high-temperature non-stick properties of the base oil modified layer obtained by the modified polyaryletherketone base oil of this application are significantly better than those of the layer obtained by solid unmodified particles in the comparative example, and the effect on the cross-cut test is not significant. (3) Comparing Example 1 / 11 and Comparative Example 2 / 3, the various test performances of the base oil modified layer obtained by the modified polyaryletherketone of this application are significantly better than those of the layer obtained by hollow unmodified particles in Comparative Example 2 / 3. The main reason is that the 2 / 3 hollow, unmodified particles do not cross-link during the formation of the layer, resulting in a looser layer. The stored oil will be released in a short period of time, and the loose pores will affect the corrosion resistance and scratch resistance of the cookware.

Claims

1. A base oil modified layer, characterized in that, The base oil modified layer includes a first crosslinking product layer and liquid silicone oil composited on the first crosslinking product layer. The first crosslinking product layer includes a mixed layer of a first crosslinking product and a second crosslinking product. The first crosslinking product is a crosslinking product of polyamide-imide resin and polyethersulfone resin. The second crosslinking product is a crosslinking product between particles of modified polyaryletherketone. The modified polyaryletherketone is a polyaryletherketone resin grafted with polycondensable groups.

2. The base oil modified layer according to claim 1, characterized in that, The liquid silicone oil is bonded to the first crosslinked product layer; and / or, the liquid silicone oil is adsorbed on the surface of the first crosslinked product layer; and / or, the first crosslinked product layer has a multidimensional network structure, and the liquid silicone oil fills into the multidimensional network structure of the first crosslinked product layer.

3. The base oil modified layer according to claim 1, characterized in that, The polyaryletherketone resin includes at least one of polyetherketone, polyetheretherketone, polyetherketoneketone, polyetheretherketoneketone, and polyetherketoneetherketoneketone; and / or, the liquid silicone oil includes methyl silicone oil or hydroxyl silicone oil; and / or, the polycondensable group includes at least two of sulfonic acid group, nitro group, hydroxyl group, carboxyl group, and amino group, or is hydroxyl or amino.

4. The base oil modified layer according to claim 1, characterized in that, The thickness of the base oil modified layer is 15 micrometers to 30 micrometers; and / or, the first crosslinked product layer has a porosity of 20% to 65% and a pore size of 10 nanometers to 1 micrometer.

5. The base oil modified layer according to claim 1, characterized in that, The weight ratio of the first crosslinked product layer to the liquid silicone oil is (26-40):(4-8); and / or, in the first crosslinked product layer, the weight ratio of the first crosslinked product to the second crosslinked product is (6-10):(20-30).

6. The base oil modified layer according to claim 1, characterized in that, The base oil modified layer also includes filler, which is uniformly dispersed in the first crosslinking product layer. The weight ratio of the first crosslinking product layer, liquid silicone oil and filler is (26-40):(4-8):(3-10).

7. The base oil modified layer according to claim 6, characterized in that, The filler includes at least one of carbon black, silicon carbide, titanium dioxide, and alumina.

8. The base oil modified layer according to claim 1, characterized in that, The base oil modified layer is formed by curing the base oil, wherein the base oil includes a dispersion solution, a composite material, a polyamide-imide resin, and a polyethersulfone resin, wherein the composite material, the polyamide-imide resin, and the polyethersulfone resin are all dispersed in the dispersion solution, and the composite material is a material comprising modified polyaryletherketone and a first liquid silicone oil.

9. The base oil modified layer according to claim 8, characterized in that, In the base oil, the first liquid silicone oil is bonded to the modified polyaryletherketone; and / or, the first liquid silicone oil is adsorbed on the surface of the modified polyaryletherketone; and / or, the modified polyaryletherketone has a porous structure, and the first liquid silicone oil fills the porous structure of the modified polyaryletherketone; and / or, in the composite material, the weight ratio of the modified polyaryletherketone to the first liquid silicone oil is (20-30):(3-6).

10. The base oil modified layer according to claim 8, characterized in that, The weight ratio of the dispersion solution, modified polyaryletherketone, first liquid silicone oil, polyamide-imide resin and polyethersulfone resin in the base oil is (55-75):(20-30):(3-6):(3-5):(3-5).

11. The base oil modified layer according to claim 8, characterized in that, The base oil further includes a second liquid silicone oil. The composite material, polyamide-imide resin, polyethersulfone resin and the second liquid silicone oil are all dispersed in the dispersion solution. The weight ratio of the dispersion solution, modified polyaryletherketone, first liquid silicone oil, polyamide-imide resin, polyethersulfone resin and second liquid silicone oil is (55-75):(20-30):(3-6):(3-5):(3-5):(1-2).

12. The base oil modified layer according to claim 8, characterized in that, The base oil also includes dispersing agents and fillers. The composite material, polyamide-imide resin, polyethersulfone resin, fillers and dispersing agents are uniformly dispersed in the dispersion solution. The weight ratio of the dispersion solution, modified polyaryletherketone, first liquid silicone oil, polyamide-imide resin, polyethersulfone resin, fillers and dispersing agents is (55-75):(20-30):(3-6):(3-5):(3-5):(3-10):(5-10).

13. The base oil modified layer according to any one of claims 8 to 12, characterized in that, The modified polyaryletherketone in the base oil has a particle size of 30 nm to 205 nm; and / or, the polyamide-imide resin in the base oil has a particle size of 15 nm to 20 nm; and / or, the polyethersulfone resin in the base oil has a particle size of 15 nm to 20 nm; the modified polyaryletherketone in the base oil has a porosity of 30% to 70% and a pore size of 10 nm to 120 nm; and / or, the degree of polymerization of the polyamide-imide resin is 50 to 200; and / or, the degree of polymerization of the polyethersulfone resin is 50 to 150; and / or, the first crosslinking product layer comprises a crosslinking product having at least one chemical bond selected from ester bonds, aliphatic ethers, aromatic ethers, amide bonds, aromatic amines, sulfonates, and sulfonamides, and having a benzene ring, a carbonyl group, and a carbon-carbon bond.

14. A method for manufacturing a base oil modified layer, characterized in that, The manufacturing method includes: Provide polyaryletherketone particles with a porous structure; The polyaryletherketone particles are activated to graft polycondensable groups onto the porous polyaryletherketone particles, thereby forming modified polyaryletherketone. A second mixed slurry comprising liquid silicone oil, the modified polyaryletherketone, polyamide-imide resin, polyethersulfone resin, and a dispersion solution is formed. In the second mixed slurry, at least a portion of the liquid silicone oil is compounded on the modified polyaryletherketone to form a composite material, thereby obtaining a base oil in which the composite material, polyamide-imide resin, and polyethersulfone resin are all dispersed in the dispersion solution. The base oil is coated and sintered to cure, thereby obtaining the base oil modified layer.

15. An appliance, characterized in that, The appliance includes an appliance substrate and a base oil modified layer formed on the appliance substrate, wherein the base oil modified layer is a base oil modified layer according to any one of claims 1 to 13, or a base oil modified layer manufactured by the method for manufacturing a base oil modified layer according to claim 14.

16. The appliance according to claim 15, characterized in that, The appliance also includes a top oil layer, which is disposed between the appliance substrate and the base oil modification layer.

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