A high-performance non-stick pan coating and its preparation process

Abstract

The present invention provides a high-performance non-stick pan coating and a preparation process thereof. The high-performance non-stick pan coating comprises the following raw materials in parts by weight: 10-24 parts of bisphenol A epoxy resin, 12-36 parts of propanol, 6-12 parts of surfactant, 20-40 parts of zirconium phosphate layered nanoparticles, 4-8 parts of nano silicon nitride, 6-8 parts of nano silicon dioxide, 4-16 parts of modified graphene, 1-3 parts of leveling agent, and 1-3 parts of silane coupling agent. The non-stick coating prepared by applying the non-stick pan coating of the present invention to a non-stick pan has high hardness, strong adhesion, good acid resistance, alkali resistance and long service life.

Description

Technical Field

[0001] The present invention relates to the technical field of coatings, and particularly relates to a high-performance non-stick pan coating and a preparation process thereof. Background Art

[0002] Cookware is commonly used in daily life. It can be classified by function into pressure cookers, frying pans, woks, soup pots, steamers, milk pans, rice cookers, etc.; by material into stainless steel pans, iron pans, aluminum pans, casserole pans, copper pans, enamel pans, composite material pans, etc.; by the number of handles into single-ear pans and double-ear pans; by the shape of the bottom into flat pans and round-bottom pans, etc. When people are cooking or making meals, if the heat is too high and the pan body is heated strongly, the food often sticks to the bottom of the pan and gets burnt frequently. Moreover, the adhesion of the food adhering to the cookware is relatively large, making it laborious to clean. With the development of productivity, the advent of non-stick pans has brought great convenience to people's lives. However, the traditional non-stick pan coating material is relatively soft. When users sometimes use metal spatulas during cooking, due to the relatively large hardness of this product, after long-term use, the coating inside the pan is often scratched and damaged, thus affecting its non-stick effect. Summary of the Invention

[0003] In view of this, the present invention provides a high-performance non-stick pan coating and a preparation process thereof to solve the above problems.

[0004] The technical solution of the present invention is realized as follows: A high-performance non-stick pan coating comprises the following raw materials in parts by weight: 10 - 24 parts of bisphenol A epoxy resin, 12 - 36 parts of propanol, 6 - 12 parts of surfactant, 20 - 40 parts of zirconium phosphate layered nanoparticles, 4 - 8 parts of nano silicon nitride, 6 - 8 parts of nano silicon dioxide, 4 - 16 parts of modified graphene, 1 - 3 parts of leveling agent, and 1 - 3 parts of silane coupling agent.

[0005] Further, a high-performance non-stick pan coating comprises the following raw materials in parts by weight: 16 parts of bisphenol A epoxy resin, 24 parts of propanol, 9 parts of surfactant, 30 parts of zirconium phosphate layered nanoparticles, 6 parts of nano silicon nitride, 7 parts of nano silicon dioxide, 10 parts of modified graphene, 2 parts of leveling agent, and 2 parts of silane coupling agent.

[0006] Further, the modified graphene is prepared by the following method: Under the condition of 20 - 30 °C, graphene powder is added to absolute ethanol, and stirred at 300 - 500 rpm for 10 - 20 min to obtain a graphene ethanol dispersion. The mass - volume ratio of the graphene powder to absolute ethanol (g / mL) is (0.03 - 0.05):(3.0 - 4.0); Hydroxyl - terminated polyamide and zinc oxide are stirred at 300 - 500 rpm for 5 - 10 min, and then dropped into the graphene ethanol dispersion. The volume ratio of the hydroxyl - terminated polyamide, zinc oxide, and graphene ethanol dispersion (g / mL) is (0.04 - 0.10):(0.04 - 0.10):(1.0 - 3.0). The above - mentioned mixed solution is placed into an ultrasonic device and ultrasonically treated for 25 - 35 min under the conditions of an ultrasonic frequency of 20 - 40 kHz and an ultrasonic power of 100 - 300 W. After the ultrasonic treatment, the mixed solution is continuously stirred at 300 - 500 rpm until a sol state is formed. The sol is placed in an oven and dried at 60 - 80 °C for 6 - 10 h to obtain a gel - like composite; The gel - like composite is placed in a sintering furnace and sintered at 200 - 400 °C for 40 - 60 min in an inert atmosphere; After sintering, the composite is taken out and cooled to 20 - 30 °C, and ground to 30 - 50 nm to obtain the modified graphene.

[0007] Further, the surfactant is one or a combination of several of polyvinyl alcohol, polyoxyethylene dodecyl ether, sodium lauroamphoacetate, dodecyl dimethyl betaine, and potassium dodecyl phosphate.

[0008] Further, the leveling agent is one of polydimethylsiloxane, octylphenol polyoxyethylene ether, and butyl acetate.

[0009] Further, the silane coupling agent is one or a combination of several of γ - aminopropyltriethoxysilane, γ - glycidoxypropyltrimethoxysilane, γ - methacryloxypropyltrimethoxysilane, β - (3,4 - epoxycyclohexyl)ethyltrimethoxysilane, γ - mercaptopropyltrimethoxysilane, and vinyltrimethoxysilane.

[0010] Further, a preparation process of a high - performance non - stick pan coating includes the following steps:

[0011] (1) Bisphenol A epoxy resin, a surfactant, and layered zirconium phosphate nanoparticles are added to propanol, mixed and stirred under heating conditions at 40 - 50 °C to obtain a matrix solution;

[0012] (2) Nano - silicon nitride and nano - silicon dioxide are added to the above - mentioned matrix solution, and ultrasonically stirred evenly to obtain a mixed solution;

[0013] (3) Add graphene composite to the above mixed solution, mix evenly, then add a leveling agent and a silane coupling agent, and mix evenly to obtain a high-performance non-stick pan coating.

[0014] Further, in step (1), the stirring speed is 500 - 800 rpm and the stirring time is 30 - 40 min. In step (2), the ultrasonic stirring power is 200 - 400 W, the ultrasonic frequency is 20 - 40 kHz, and the ultrasonic stirring time is 20 - 30 min. In step (3), when adding the graphene composite, stir at 300 - 500 rpm for 15 - 20 min, and when adding the leveling agent and the silane coupling agent, stir at 300 - 500 rpm for 10 - 15 min.

[0015] Further, the high-performance non-stick pan coating is applied to the inner surface layer of the pan.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: When the zirconium phosphate layered nanoparticles are evenly dispersed in the coating in the present invention, it can effectively improve the heat resistance temperature of the coating and the ability to resist the erosion of various chemical substances, and can also significantly increase the hardness, wear resistance and scratch resistance of the coating. At the same time, the active sites of the zirconium phosphate layered nanoparticles can form chemical bonds with the functional groups in the bisphenol A epoxy resin molecules, firmly fixing the epoxy resin molecules on the surface of the zirconium phosphate layered nanoparticles. Due to the large specific surface area and layered structure of the zirconium phosphate layered nanoparticles, a wide network structure can be formed in the coating. This network structure tightly connects the epoxy resin molecules with nano silicon nitride, nano silicon dioxide, leveling agent and silane coupling agent to form a denser network structure, which helps to improve the adhesion, cohesion and overall mechanical properties of the coating, making the coating more firmly attached to the metal substrate and not easy to fall off. In addition, during the curing process of the coating, the zirconium phosphate layered nanoparticles can be peeled off and arranged in a highly ordered manner to form a regular lamellar structure. This ordered arrangement not only enhances the physical strength of the coating, but also forms an effective barrier, which can greatly slow down or prevent the penetration of corrosive media such as water, oxygen, acidic or alkaline substances into the metal substrate, thus significantly improving the corrosion resistance of the coating and prolonging the service life of the pan.

[0017] In the present invention, graphene is modified using hydroxyl-terminated amide and zinc dioxide. The addition of hydroxyl-terminated polyamide enables its amino functional groups to interact with the surface of graphene, introducing amino functional groups onto the graphene surface through chemical bonding, and significantly enhancing the compatibility between the modified graphene and epoxy resin. The amino functional groups of the modified graphene react with the epoxy groups and carboxyl groups in the epoxy resin, promoting the crosslinking reaction among the components of the coating, thereby forming a denser and stronger coating structure. During the modification sol-gel transition and sintering process, zinc dioxide particles adhere to the graphene surface, forming a composite reinforcement structure, which helps to improve the hardness and anti-wear performance of the modified graphene, making it exhibit more excellent mechanical properties in non-stick coatings.

[0018] The surfactant in the present invention can adsorb on the surface of zirconium phosphate layered nanoparticles. Through its lipophilic groups, it is compatible with the epoxy resin matrix, while the hydrophilic groups face the outside of the particles, forming a coating film. This coating film effectively reduces the surface tension between the nanoparticles, prevents the agglomeration of the particles, thereby improving the dispersion degree and orientation degree of the zirconium phosphate layered nanoparticles in the epoxy resin, and enabling the layered nanoparticles to efficiently exert their barrier effect, further improving the anti-corrosion performance of the coating. Detailed implementation manners

[0019] To better understand the technical content of the present invention, specific examples are provided below to further illustrate the present invention.

[0020] Unless otherwise specified, the experimental methods used in the embodiments of the present invention are all conventional methods.

[0021] Unless otherwise specified, the materials, reagents, etc. used in the embodiments of the present invention can all be obtained from commercial channels.

[0022] Example 1

[0023] A high-performance non-stick pan coating, comprising the following raw materials in parts by weight: 10 parts of bisphenol A epoxy resin, 12 parts of propanol, 6 parts of surfactant, 20 parts of zirconium phosphate layered nanoparticles, 4 parts of nano silicon nitride, 6 parts of nano silicon dioxide, 4 parts of modified graphene, 1 part of leveling agent, and 1 part of silane coupling agent. Among them, the surfactant is polyvinyl alcohol, the leveling agent is polydimethylsiloxane, and the silane coupling agent is γ-glycidoxypropyltrimethoxysilane. The modified graphene is prepared by the following method: At 20 °C, graphene powder is added to absolute ethanol and stirred at 300 rpm for 20 min to obtain a graphene ethanol dispersion, and the mass-volume ratio of the graphene powder to absolute ethanol is 0.03:3.0 g / mL; The terminal hydroxyl polyamide and zinc oxide are stirred at 300 rpm for 10 min and added dropwise to the graphene ethanol dispersion. The volume ratio of the terminal hydroxyl polyamide, zinc oxide, and graphene ethanol dispersion is 0.04:0.04:1.0 g / mL. The above mixture is placed in an ultrasonic device and ultrasonically treated at an ultrasonic frequency of 20 kHz and an ultrasonic power of 100 W for 35 min. After the ultrasonic treatment, the mixture is continuously stirred at 300 rpm until a sol state is formed. The sol is placed in a drying oven and dried at 60 °C for 10 h to obtain a gel-like composite; The gel-like composite is placed in a sintering furnace and sintered at 200 °C for 60 min under an inert atmosphere; After sintering, the composite is taken out and cooled to 20 °C and ground to 30 nm to obtain modified graphene.

[0024] Example 2

[0025] A high-performance non-stick pan coating, comprising the following raw materials in parts by weight: 24 parts of bisphenol A epoxy resin, 36 parts of propanol, 12 parts of surfactant, 40 parts of zirconium phosphate layered nanoparticles, 8 parts of nano silicon nitride, 8 parts of nano silicon dioxide, 16 parts of modified graphene, 3 parts of leveling agent, and 3 parts of silane coupling agent. Among them, the surfactant is a 1:1 combination of polyoxyethylene dodecyl ether and sodium lauroamphoacetate, the leveling agent is octylphenol polyoxyethylene ether, and the silane coupling agent is a 1:1 combination of γ-aminopropyltriethoxysilane and γ-methacryloxypropyltrimethoxysilane. The modified graphene is prepared by the following method: At 30 °C, graphene powder is added to absolute ethanol and stirred at 500 rpm for 20 min to obtain a graphene ethanol dispersion, and the mass-volume ratio of the graphene powder to absolute ethanol is 0.05:4.0 g / mL; The hydroxyl-terminated polyamide and zinc oxide are stirred at 500 rpm for 10 min and then dropped into the graphene ethanol dispersion. The volume ratio of the hydroxyl-terminated polyamide, zinc oxide, and graphene ethanol dispersion is 0.10:0.10:3.0 g / mL. The above mixture is placed in an ultrasonic device and ultrasonically treated for 25 min under the conditions of an ultrasonic frequency of 40 kHz and an ultrasonic power of 300 W. After the ultrasonic treatment, the mixture is continuously stirred at 500 pm until a sol state is formed. The sol is placed in a drying oven and dried at 80 °C for 6 h to obtain a gel-like composite; The gel-like composite is placed in a sintering furnace and sintered at 400 °C for 40 min in an inert atmosphere; After sintering, the composite is taken out and cooled to 30 °C, and ground to 50 nm to obtain modified graphene.

[0026] Example 3

[0027] A high-performance non-stick pan coating, comprising the following raw materials in parts by weight: 16 parts of bisphenol A epoxy resin, 24 parts of propanol, 9 parts of surfactant, 30 parts of zirconium phosphate layered nanoparticles, 6 parts of nano silicon nitride, 7 parts of nano silicon dioxide, 10 parts of modified graphene, 2 parts of leveling agent, and 2 parts of silane coupling agent. Among them, the surfactant is composed of polyoxyethylene dodecyl ether, dodecyl dimethyl betaine, and potassium dodecyl phosphate in a ratio of 1:1:1, the leveling agent is butyl acetate, and the silane coupling agent is a combination of γ-glycidoxypropyltrimethoxysilane, β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, and vinyltrimethoxysilane in a ratio of 1:1:1. The modified graphene therein is prepared by the following method: At 25°C, graphene powder is added to absolute ethanol and stirred at 400 rpm for 15 min to obtain a graphene ethanol dispersion, and the mass-volume ratio of the graphene powder to absolute ethanol is 0.04:3.50 g / mL; hydroxyl-terminated polyamide and zinc dioxide are stirred at 400 rpm for 7.5 min and then dropped into the graphene ethanol dispersion, and the volume ratio of the hydroxyl-terminated polyamide, zinc dioxide, and graphene ethanol dispersion is 0.07:0.07:2.00 g / mL. The above mixture is placed in an ultrasonic device and ultrasonically treated for 30 min under the conditions of an ultrasonic frequency of 30 kHz and an ultrasonic power of 200 W. After the ultrasonic treatment, the mixture is continuously stirred at 400 pm until a sol state is formed. The sol is placed in an oven and dried at 70°C for 8 h to obtain a gel-like composite; the gel-like composite is placed in a sintering furnace and sintered at 300°C for 50 min in an inert atmosphere; after the sintering is completed, the composite is taken out and cooled to 25°C and ground to 40 nm to obtain modified graphene.

[0028] A high-performance non-stick pan coating described in the above Examples 1-3 is prepared according to the following process, including the following steps:

[0029] (1) Add bisphenol A epoxy resin, surfactant, and zirconium phosphate layered nanoparticles to propanol, mix and stir at 650 rpm for 35 min under heating conditions at 45°C to obtain a matrix solution;

[0030] (2) Add nano silicon nitride and nano silicon dioxide to the above matrix solution and ultrasonically stir at a stirring power of 300 W and an ultrasonic frequency of 30 kHz for 25 min to obtain a mixed solution;

[0031] (3) Add graphene composite to the above mixed solution, stir at 400 rpm for 17.5 min, then add leveling agent and silane coupling agent, and stir at 400 rpm for 12.5 min to obtain a high-performance non-stick pan coating.

[0032] Example 4

[0033] This example is compared with Example 3. The difference lies in that a high-performance non-stick pan coating is prepared according to the following process, including the following steps:

[0034] (1) Add bisphenol A epoxy resin, surfactant and zirconium phosphate layered nanoparticles to propanol, mix and stir at 500 rpm for 40 min under heating conditions at 40 °C to obtain a matrix solution;

[0035] (2) Add nano silicon nitride and nano silicon dioxide to the above matrix solution, and ultrasonically stir for 30 min under the conditions of a stirring power of 200 W and an ultrasonic frequency of 20 kHz to obtain a mixed solution;

[0036] (3) Add graphene composite to the above mixed solution, stir at 300 rpm for 20 min, then add a leveling agent and a silane coupling agent, and stir at 300 rpm for 15 min to obtain a high-performance non-stick pan coating.

[0037] Example 5

[0038] This example is compared with Example 3. The difference lies in that a high-performance non-stick pan coating is prepared according to the following process, including the following steps:

[0039] (1) Add bisphenol A epoxy resin, surfactant and zirconium phosphate layered nanoparticles to propanol, mix and stir at 800 rpm for 30 min under heating conditions at 50 °C to obtain a matrix solution;

[0040] (2) Add nano silicon nitride and nano silicon dioxide to the above matrix solution, and ultrasonically stir for 20 min under the conditions of a stirring power of 400 W and an ultrasonic frequency of 40 kHz to obtain a mixed solution;

[0041] (3) Add graphene composite to the above mixed solution, stir at 500 rpm for 15 min, then add a leveling agent and a silane coupling agent, and stir at 500 rpm for 10 min to obtain a high-performance non-stick pan coating.

[0042] Apply the high-performance non-stick pan coatings described in Examples 1-5 above to the inner surface layer of cookware to obtain non-stick coatings.

[0043] Comparative Example 1

[0044] This comparative example is compared with Example 3. The difference lies in that zirconium phosphate layered nanoparticles are not contained in the raw materials.

[0045] Comparative Example 2

[0046] This comparative example is compared with Example 3. The difference lies in that modified graphene is not contained in the raw materials.

[0047] Comparative Example 3

[0048] This comparative example is compared with Example 3. The difference is that graphene with equal weight parts is used instead of modified graphene.

[0049] Comparative Example 4

[0050] This comparative example is compared with Example 3. The difference is that no surfactant is added to the raw materials.

[0051] Performance test

[0052] The non-stick coatings prepared in Examples 1-5 and Comparative Examples 1-4 were subjected to performance tests.

[0053] 1. Alkali resistance test: Referring to the test method and requirements of GB / T 32095.3-2015, pour a sodium carbonate solution with a concentration of 2 wt% into the non-stick pan to a height of about 2 / 3, cover and boil, and continue boiling for 10 min. After standing in an environment of 23 °C for 2 h, pour out the acetic acid, rinse with clean water, wipe dry with a soft cloth, and check the non-stick surface with a 4-fold magnifying glass. If there are no blisters or peeling phenomena on the coating, continue the test until there are no blisters or peeling on the coating, then stop the test. Adding acetic acid once is recorded as one cycle, and the previous cycle when there are no blisters or peeling on the coating is used as the standard. Repeat the test 3 times, and the test results are shown in Table 1.

[0054] 2. Acid resistance test: Referring to the test method and requirements of GB / T 32095.3-2015, pour acetic acid with a concentration of 2 wt% into the non-stick pan to a height of about 2 / 3, cover and boil, and continue boiling for 10 min. After standing in an environment of 23 °C for 2 h, pour out the acetic acid, rinse with clean water, wipe dry with a soft cloth, and check the non-stick surface with a 4-fold magnifying glass. If there are no blisters or peeling phenomena on the coating, continue the test until there are no blisters or peeling on the coating, then stop the test. Adding acetic acid once is recorded as one cycle, and the previous cycle when there are no blisters or peeling on the coating is used as the standard. Repeat the test 3 times, and the test results are shown in Table 1.

[0055] 3. Hardness test: Referring to the test method and requirements of GB / T 6739-2022, use a pencil to slide parallel on the coating surface with a force of 10 N for 20 mm, and gradually increase the hardness of the pencil until visible defects appear on the coating surface. The hardness of the hardest pencil without coating defects is recorded as the coating hardness. Repeat the test 5 times, and take the average value and record it in Table 1.

[0056] 4. Adhesion test: Referring to the test method and requirements of GB / T 9286-2021, use a cross cutter to make 100 grids with an area of 1 mm on the coating surface 2For the small square grids, the tip of the scribing tool must penetrate the coating. Attach 3M 600 tape to the scribing area, hold one end of the tape, and quickly pull it up at a 90° right angle. Repeat this 5 times, using a new tape each time. Observe the peeling of the coating and record the corresponding grade in Table 1. The grade classification standard refers to the requirements of GB / T 9286.

[0057] 5. Service life test: Simulate the normal use of users. Cook rice with Northeast rice. Take cooking, keeping warm, then cooling the cookware and cleaning it as one cycle. Conduct continuous testing for 24 hours until dot-like peeling of the coating occurs. Take the previous cycle before the dot-like peeling of the coating as the standard. Repeat the test 3 times, and the test results are shown in Table 1.

[0058] Table 1

[0059]

[0060]

[0061] As can be seen from Table 1, the non-stick coatings prepared in Examples 1-5 have high hardness, strong adhesion, good acid resistance, alkali resistance and long service life. In particular, the effect of Example 3 is better.

[0062] By comparing Example 3 with Comparative Example 1, Example 3 is superior to Comparative Example 1 in terms of acid resistance, alkali resistance, hardness, adhesion and service life. This is because when zirconium phosphate layered nanoparticles are dispersed in the coating in Example 3, it can effectively increase the heat resistance temperature of the coating and the ability to resist the erosion of acidic and alkaline chemical substances. It can also significantly increase the hardness, wear resistance and scratch resistance of the coating. At the same time, the active sites of zirconium phosphate layered nanoparticles can form chemical bonds with the functional groups in bisphenol A epoxy resin molecules, firmly fixing the epoxy resin molecules on the surface of zirconium phosphate layered nanoparticles. Due to the large specific surface area and layered structure of zirconium phosphate layered nanoparticles, a wide network structure can be formed in the coating. This network structure tightly connects epoxy resin molecules with nano silicon nitride, nano silicon dioxide, leveling agent and silane coupling agent to form a more dense network structure, which helps to improve the adhesion and cohesion of the coating, further enhance the acid resistance, alkali resistance and hardness of the coating, and make the coating more firmly adhere to the metal substrate and not easily fall off, thereby extending the service life of the coating. In addition, during the curing process of the coating, zirconium phosphate layered nanoparticles can peel off and arrange in a highly ordered manner to form a regular lamellar structure. This ordered arrangement not only enhances the physical strength of the coating, but also forms an effective barrier, which can greatly slow down or prevent the penetration of corrosive media such as water, oxygen, acidic or alkaline substances into the metal substrate, thus significantly improving the corrosion resistance of the coating and extending the service life of the cookware.

[0063] By comparing Example 3 with Comparative Example 2 and Comparative Example 3, Example 3 is superior to Comparative Example 2 and Comparative Example 3 in terms of acid resistance, alkali resistance, hardness, adhesion, and service life. This is because in Example 3, graphene is modified with terminal hydroxyl amide and zinc dioxide. The addition of terminal hydroxyl polyamide enables its amino functional groups to interact with the surface of graphene, grafting terminal hydroxyl polyamide molecules onto graphene, thereby introducing amino functional groups, significantly enhancing the compatibility between the modified graphene and epoxy resin, and improving the adhesion between the coating and the substrate. The amino functional groups of the modified graphene react with the epoxy groups and carboxyl groups in the epoxy resin, promoting the cross-linking reaction among the components of the coating, thus forming a denser and more solid coating structure, reducing the pores and defects in the coating, and further improving the acid resistance, alkali resistance, and adhesion of the coating. During the modification of the sol-gel transition and sintering process, zinc dioxide particles adhere to the surface of graphene, forming a composite reinforcement structure, which helps to improve the hardness, anti-wear performance, and service life of the modified graphene.

[0064] By comparing Example 3 with Comparative Example 4, the surfactant in Example 3 can adsorb on the surfaces of zirconium phosphate layered nanoparticles, nano silicon nitride, and nano silicon dioxide. Through its lipophilic groups, it is compatible with the epoxy resin matrix, while the hydrophilic groups face the outside of the particles, forming a coating film. This coating film effectively reduces the surface tension between the nanoparticles, prevents the agglomeration of the particles, thereby improving the dispersion degree of zirconium phosphate layered nanoparticles, nano silicon nitride, and nano silicon dioxide in the epoxy resin and the orientation degree of zirconium phosphate layered nanoparticles, enabling the zirconium phosphate layered nanoparticles to effectively exert their barrier effect and further improving the corrosion resistance of the coating. At the same time, it makes nano silicon nitride and nano silicon dioxide evenly dispersed, improves the overall hardness of the coating, enhances the wear resistance and scratch resistance of the coating, reduces the pores and defects in the coating, forms a denser barrier, and effectively blocks the penetration of acidic and alkaline substances, thus significantly improving the acid resistance and alkali resistance of the coating. In addition, the surfactant improves the compatibility between the nanoparticles and the epoxy resin matrix, enabling the nanoparticles to bind more firmly to the epoxy resin, helping to improve the adhesion between the coating and the substrate, preventing the coating from peeling off or cracking during use, and further extending the service life.

[0065] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-performance non-stick pan coating, characterized in that: The invention comprises the following raw materials in parts by weight: 10-24 parts of bisphenol A epoxy resin, 12-36 parts of propanol, 6-12 parts of surfactant, 20-40 parts of zirconium phosphate layered nanoparticles, 4-8 parts of nano silicon nitride, 6-8 parts of nano silicon dioxide, 4-16 parts of modified graphene, 1-3 parts of leveling agent and 1-3 parts of silane coupling agent; The modified graphene is prepared by the following method: adding graphene powder to anhydrous ethanol at 20-30° C., stirring at 300-500 rpm for 10-20 min, to prepare a graphene ethanol dispersion, wherein the mass volume ratio of the graphene powder to the anhydrous ethanol is (0.03-0.05):(3.0-4.0) g / mL; stirring hydroxyl-terminated polyamide and zinc dioxide at 300-500 rpm for 5-10 min, and adding them dropwise to the graphene ethanol dispersion, wherein the mass volume ratio of the hydroxyl-terminated polyamide, zinc dioxide, and graphene ethanol dispersion is (0.04-0.10):(0.04-0.10) g / mL. ):(1.0-3.0), placing the above mixed solution in an ultrasonic device, and ultrasonically treating it for 25-35 minutes under the conditions of ultrasonic frequency of 20-40kHz and ultrasonic power of 100-300W. After the ultrasonic treatment, continue to stir the mixed solution at 300-500rpm until a sol state is formed, and place the sol in a drying oven and dry it at 60-80℃ for 6-10h to obtain a gel-like composite; place the gel-like composite in a sintering furnace, and sinter it at 200-400℃ for 40-60min under an inert atmosphere; after the sintering, take out the composite and cool it to 20-30℃, grind it to 30-50nm, and obtain modified graphene.

2. A high performance non-stick pan coating as claimed in claim 1, characterized in that: The invention comprises the following raw materials in parts by weight: 16 parts of bisphenol A epoxy resin, 24 parts of propanol, 9 parts of surfactant, 30 parts of zirconium phosphate layered nanoparticles, 6 parts of nano silicon nitride, 7 parts of nano silicon dioxide, 10 parts of modified graphene, 2 parts of leveling agent and 2 parts of silane coupling agent.

3. A high performance non-stick pan coating as claimed in claim 1, characterized in that: The surfactant is one or a combination of polyvinyl alcohol, polyoxyethylene lauryl ether, sodium lauroamphoacetate, dodecyl dimethyl betaine, and potassium dodecyl phosphate.

4. A high performance non-stick pan coating as claimed in claim 1, characterized in that: The leveling agent is one of polydimethylsiloxane, octylphenol polyoxyethylene ether and butyl acetate.

5. A high performance non-stick pan coating as claimed in claim 1, characterized in that: The silane coupling agent is one or a combination of γ-aminopropyl triethoxysilane, γ-glycidoxypropyl trimethoxysilane, γ-methacryloxypropyl trimethoxysilane, β-(3,4-epoxycyclohexyl)ethyl trimethoxysilane, γ-mercaptopropyl trimethoxysilane and vinyl trimethoxysilane.

6. A process for preparing a high-performance non-stick pan coating as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: (1) adding bisphenol A epoxy resin, surfactant and zirconium phosphate layered nanoparticles into propanol, mixing and stirring under heating conditions of 40-50° C. to prepare a matrix solution; (2) adding nano silicon nitride and nano silicon dioxide to the matrix solution, and stirring uniformly with ultrasonic waves to obtain a mixed solution; (3) Adding modified graphene to the mixed solution and mixing evenly, then adding a leveling agent and a silane coupling agent and mixing evenly to obtain a high-performance non-stick pan coating.

7. The process for preparing a high-performance non-stick pan coating according to claim 6, characterized in that: In the step (1), the stirring speed is 500-800 rpm, and the stirring time is 30-40 min; in the step (2), the ultrasonic stirring power is 200-400 W, the ultrasonic frequency is 20-40 kHz, and the ultrasonic stirring time is 20-30 min; in the step (3), when adding the modified graphene, stirring is performed at 300-500 rpm for 15-20 min, and when adding the leveling agent and the silane coupling agent, stirring is performed at 300-500 rpm for 10-15 min.

8. The use of a high-performance non-stick pan coating as claimed in any one of claims 1 to 5, characterized in that: The high-performance non-stick pan coating is applied to the inner surface of the pan.

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