Negative ion functionalized ceramic membrane slurry, preparation thereof and use in nebulizers

Abstract

The application provides a kind of negative ion functionalized ceramic membrane slurry, which comprises the following components by mass fraction: negative ion functional component 50-70%, pore-forming agent 10-15%, binder 5-10%, and organic carrier component 15-25%. The application forms a porous ceramic substrate with negative ion functionalized ceramic membrane by sintering the above-mentioned ceramic membrane slurry on the surface of the porous ceramic substrate, and then forms a conductive heating track on the substrate to make a negative ion functionalized porous ceramic atomizing core. The atomizing core is applied in an atomizing device, which can generate high concentration of negative oxygen ions in both working and non-working states, and the release rate of negative oxygen ions can reach 800 ions / cc, thereby purifying the air around the atomizing device and providing a healthy air environment for the user.

Description

Technical Field

[0001] This invention relates to the field of electronic atomizers, specifically to a negative ion functionalized ceramic membrane slurry, its preparation, and its application in atomizers. Background Technology

[0002] Current ceramic atomizing cores in the electronic atomization industry all attempt to improve physical properties such as mechanical strength, thermal conductivity, specific heat capacity, capillary siphon rate, and particle size uniformity of atomized aerosol through structural, formulation, or process optimization. To date, no porous ceramic atomizing core in the electronic atomization industry has incorporated health benefits into its product design. In recent years, with technological advancements, the atomization performance of porous ceramic atomizing cores has become increasingly sophisticated, while the limitations of electrothermal atomization technology have become more apparent.

[0003] Negative ions, short for negative oxygen ions, are formed when oxygen molecules in the air gain excess electrons. Like oxygen molecules, they are beneficial to human health. In daily life, such as after a thunderstorm, the increase in negative ions in the air makes people feel refreshed and breathe more easily; conversely, in air-conditioned rooms with low negative ion levels, people may feel dizzy and lack energy. Research has found that negative ions can actively attract and condense particulate matter such as dust and smoke in the air, causing them to form large clusters that settle to the ground. This reduces the harm of PM2.5 to human health, purifying the air. At the same time, negative ions can improve human immunity, alleviate sub-health conditions, and provide certain therapeutic and health benefits.

[0004] Therefore, developing a porous ceramic atomizing core that can generate negative ions would enable portable aerosol generators to release negative ions during operation, thereby improving the surrounding air quality and significantly enhancing the user's health experience. Summary of the Invention

[0005] Therefore, it is necessary to provide a porous ceramic atomizing core that can generate high concentrations of negative air ions in aerosols. This atomizing core is achieved by applying a negative ion functionalized ceramic film layer between the surface of a porous ceramic substrate and a conductive heating trajectory.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A negative ion functionalized ceramic membrane slurry is provided, comprising the following components in the indicated mass fractions:

[0008] Negative ion functional components: 50%~70%

[0009] 10-15% pore-forming agent

[0010] Adhesive 5~10%

[0011] Organic carrier component 15-25%;

[0012] Based on a 100% mass fraction of negative ion functional components, the negative ion functional components comprise the following raw materials by mass fraction:

[0013] Light rare earth powder 10~45%

[0014] Tourmaline balance;

[0015] The light rare earth element is selected from at least one of cerium, lanthanum, praseodymium, neodymium, cerium oxide, lanthanum oxide, praseodymium oxide, or neodymium oxide;

[0016] Based on an organic carrier component mass fraction of 100%, the organic carrier component comprises the following raw materials by mass fraction:

[0017] Ethyl cellulose 1~5%

[0018] Lecithin 0.5-5%

[0019] Hydrogenated castor oil 0.1-5%

[0020] Borneol 0.1~5%

[0021] Solvent balance;

[0022] The solvent is selected from at least one of diethylene glycol butyl ether acetate, dibutyl phthalate, terpineol, and turpentine.

[0023] The binder is lead-free glass powder or SiO2-containing ceramic powder;

[0024] The pore-forming agent is selected from at least one of polymer microspheres, starch, activated carbon powder, graphite powder, and dolomite powder.

[0025] In the above-mentioned ceramic membrane slurry, the polymer microspheres are selected from at least one of polymethyl methacrylate microspheres, polystyrene microspheres, or polytetrafluoroethylene microspheres.

[0026] This invention also provides a method for preparing the above-mentioned negative ion functionalized ceramic membrane slurry, comprising the following steps:

[0027] Preparation of organic carrier: Weigh the solvent, ethyl cellulose, lecithin, hydrogenated castor oil and borneol according to the predetermined weight ratio, place them in a reaction vessel, heat to 85-95℃ in a water bath, and stir at high speed until there are no suspended matter in the vessel;

[0028] Preparation of functional phase mixture: Weigh tourmaline powder with D50 < 10 micrometers and D97 < 30 micrometers, light rare earth powder with D50 < 5 micrometers and D97 < 10 micrometers, and pore-forming agent powder with 15 micrometers ≤ D50 ≤ 40 micrometers according to a predetermined weight ratio, and mix them in an all-round mixer for 3-6 hours.

[0029] Material preparation: Weigh the organic carrier, functional phase mixture and binder powder according to the predetermined weight ratio, and mix them evenly to obtain the negative ion functionalized ceramic membrane slurry.

[0030] In the above method for preparing ceramic membrane slurry, the solvent is at least one selected from diethylene glycol butyl ether acetate, dibutyl phthalate, terpineol, and turpentine.

[0031] In the above method for preparing ceramic membrane slurry, the light rare earth element is selected from at least one of cerium, lanthanum, praseodymium, neodymium, cerium oxide, lanthanum oxide, praseodymium oxide, or neodymium oxide.

[0032] In the above-mentioned method for preparing ceramic membrane slurry, the pore-forming agent is selected from at least one of polymer microspheres, starch, activated carbon powder, graphite powder, and dolomite powder; the polymer microspheres are selected from at least one of polymethyl methacrylate microspheres, polystyrene microspheres, or polytetrafluoroethylene microspheres.

[0033] In the above method for preparing ceramic film slurry, the binder is lead-free glass powder or SiO2-containing ceramic powder.

[0034] The present invention also provides a negative ion functionalized porous ceramic substrate, comprising a porous ceramic substrate and a negative ion functionalized film layer disposed on the surface of the substrate, wherein the negative ion functionalized film layer is formed by sintering the aforementioned negative ion functionalized ceramic film slurry onto the surface of the substrate.

[0035] This invention also provides a method for preparing the above-mentioned negative ion functionalized porous ceramic matrix, comprising the following steps:

[0036] Preparation of ceramic blanks:

[0037] Based on 100 parts by weight, take 50-70 parts of paraffin wax, 5-20 parts of polyethylene, 5-20 parts of polypropylene, and 1-10 parts of stearic acid. Heat and melt them at 130-150℃, then use a high-speed disperser to mix them evenly at a speed of 800-1200 rad / min to obtain an organic continuous phase.

[0038] Based on 100 parts by weight, take 20-60 parts of organic continuous phase, melt it at 120-140°C, add 20-40 parts of diatomaceous earth powder, 10-30 parts of pore-forming agent powder, and 5-20 parts of clay powder, mix and knead evenly at 120-140°C, and then mold it into a green body by injection molding, hot pressing, or extrusion.

[0039] Preparation of porous ceramic matrix: After the green body is debinded, it is sintered at 900~1100℃ for 1~3 hours, and then ground and ultrasonically cleaned to obtain a porous ceramic matrix.

[0040] Negative ion functionalization shaping: The prepared negative ion functionalized ceramic film slurry is printed onto a porous ceramic substrate using a thick film printing method, and sintered in an air environment at 800~1100℃ to obtain a negative ion functionalized porous ceramic substrate.

[0041] In the above method for preparing negative ion functionalized porous ceramic matrix, the pore-forming agent is selected from at least one of polymer microspheres, starch, activated carbon, graphite, and dolomite; the polymer microspheres are selected from at least one of polymethyl methacrylate microspheres, polystyrene microspheres, or polytetrafluoroethylene microspheres.

[0042] In the above method for preparing negative ion functionalized porous ceramic matrix, the material is clay, kaolin, and / or metakaolin.

[0043] The present invention further provides a negative ion functionalized porous ceramic atomizing core, comprising the above-mentioned negative ion functionalized porous ceramic substrate, and conductive heating traces disposed on the surface of the substrate.

[0044] The above-mentioned method for preparing a negative ion functionalized porous ceramic atomizing core involves taking a conductive heating material for atomizers and applying it to the surface of the aforementioned negative ion functionalized porous ceramic substrate using a thick film printing or coating process to form a conductive heating trajectory.

[0045] This invention achieves negative ion proliferation in the atomizing core by setting a negative ion functionalized ceramic film layer between a porous ceramic substrate and a conductive heating track. When this atomizing core is applied to an atomizing device, it generates a high concentration of negative oxygen ions both during and off-peak operation, with a release rate as high as 800 ions / cc. The presence of negative oxygen ions purifies the air surrounding the atomizing device, providing users with a healthy air environment. Attached Figure Description

[0046] Figure 1 A schematic diagram of the cross-sectional structure of the negative ion functionalized porous ceramic atomizing core provided by the present invention.

[0047] Figure 2 The process flow diagram for preparing the negative ion functionalized porous ceramic atomizing core provided by the present invention is shown.

[0048] Reference numerals: Atomizing core: 10, Negative ion functionalized ceramic film layer: 40, Conductive heating trajectory: 30, Ceramic substrate: 20. Detailed Implementation

[0049] This invention involves obtaining a negative ion functionalized ceramic membrane slurry, sintering the slurry onto the surface of a porous ceramic substrate 20 to form a negative ion functionalized ceramic membrane layer 40, and then applying a conductive heating trajectory 30 to the substrate surface using electroplating, magnetron sputtering, or thick film printing to obtain a porous ceramic atomizing core 10 with negative ion functionality, which is then applied in an atomizer device. The atomizing core structure is as follows: Figure 1 As shown.

[0050] This invention is based on a porous ceramic membrane layer capable of generating high concentrations of negative ions, positioned between a substrate and a heat-conducting path. This membrane layer is formed from a negative ion-functionalized ceramic membrane slurry. The raw materials for this ceramic membrane slurry include solvents (terpineol, diethylene glycol butyl ether acetate, dibutyl phthalate, etc.), ethyl cellulose, lecithin, hydrogenated castor oil, borneol, tourmaline powder, cerium dioxide, diatomaceous earth powder, pore-forming agents (polymer microspheres, starch, activated carbon, graphite, dolomite, etc.), and lead-free glass powder. In different embodiments, the components, raw materials, and their amounts (all by weight percentage) are shown in the following examples:

[0051] Example 1:

[0052]

[0053] Example 2:

[0054]

[0055] Example 3:

[0056]

[0057] In the above embodiments, the raw materials used, such as terpineol, diethylene glycol butyl ether acetate, and dibutyl phthalate as solvents, can be replaced by turpentine. Each component used as a solvent can be used alone or in combination of two or more components (three components are used in combination in the above embodiments). The light rare earth powder can be powder of light rare earth elements cerium, lanthanum, praseodymium, or neodymium, or their oxides cerium oxide, lanthanum oxide, praseodymium oxide, or neodymium oxide powder, at least one of all these powders. In addition to polymer microspheres, activated carbon, and graphite in the embodiments, the pore-forming agent can also be starch, dolomite, or a mixture of two or more of them. In addition to lead-free glass powder, the binder can also be replaced by SiO2-containing ceramic powder or a mixture of both.

[0058] refer to Figure 2 The specific implementation method for preparing negative ion functionalized ceramic membrane slurry according to the raw material components of the above embodiments, and then preparing negative ion functionalized porous ceramic substrate and corresponding atomizing core is as follows:

[0059] Based on 100 parts by weight, take 50-70 parts of paraffin wax, 5-20 parts of polyethylene, 5-20 parts of polypropylene, and 1-10 parts of stearic acid. Heat and melt the mixture at 130-150°C, then use a high-speed disperser to mix at a speed of 800-1200 rad / min for 2 hours to obtain an organic continuous phase for later use.

[0060] Based on 100 parts by weight, take 20-60 parts of the above-mentioned organic continuous phase, melt it at 120-140°C, add 20-40 parts of diatomaceous earth powder, 10-30 parts of pore-forming agent powder, and 5-20 parts of clay powder, mix and knead evenly at 120-140°C, and then mold it by injection molding / hot pressing / extrusion to obtain a green body.

[0061] After the green body is debonded, it is sintered at 900~1100℃ for 1~3 hours, then ground flat and ultrasonically cleaned to obtain a porous ceramic matrix for later use.

[0062] According to the dosage determined in each embodiment, terpineol (analytical grade), diethylene glycol butyl ether acetate (analytical grade), dibutyl phthalate (analytical grade), ethyl cellulose, lecithin, hydrogenated castor oil and borneol were taken, heated in a water bath to 90°C and then dispersed and stirred at high speed until there was no suspension, to obtain an organic carrier for later use.

[0063] For the functional phase powders, take tourmaline powder (D50 < 10 μm, D97 < 30 μm), cerium dioxide (CeO2) powder (D50 < 5 μm, D97 < 10 μm), diatomaceous earth powder (D50 < 25 μm, D97 < 40 μm), and pore-forming agents (polymer microspheres / starch / activated carbon powder / graphite powder / dolomite powder) (15 μm ≤ D50 ≤ 40 μm) and mix them in an all-around mixer for 3-6 hours.

[0064] Lead-free glass was used as the binder powder (D97 < 15 micrometers, softening temperature between 750 and 800°C).

[0065] The aforementioned organic carrier, binder powder, and functional phase powder are mixed evenly to prepare a negative ion functionalized ceramic membrane slurry.

[0066] After printing negative ion functionalized ceramic film slurry onto the porous ceramic substrate prepared above using thick film printing technology, the substrate is dried and sintered in air at 800~1100℃ to obtain a porous ceramic substrate with negative ion functionalized film layer.

[0067] By applying an electroplating / magnetron sputtering or thick film printing method to the surface of the aforementioned negative ion functionalized porous ceramic substrate, a conductive heating trajectory is obtained, thereby obtaining a negative ion proliferation functionalized porous ceramic atomizing core.

[0068] Performance testing

[0069] The porous ceramic atomizing element product developed based on the above technical solution can generate negative oxygen ion aerosol. It can enable the porous ceramic atomizing core to generate high concentrations of negative oxygen ions in both working and non-working states. The negative oxygen ion release rate can reach more than 800 ions / cc. The specific test method is as follows.

[0070] Testing instruments: Japanese COM3010PRO negative ion detector, negative oxygen ion porous ceramic atomizing core, atomizing liquid tank, resistance constant power supply, anti-static cover;

[0071] Test steps:

[0072] 1. Place the air inlet of the COM3010PRO negative ion concentration detector at a height of 5cm directly above the atomizing liquid tank;

[0073] 2. Turn on the negative ion concentration detector, adjust the mode to high-speed measurement mode, and take the average value of ten measurements to obtain the ambient air negative ion concentration ρ0.

[0074] 3. Place the atomizing core with the heating trajectory facing upwards in the atomizing liquid tank, directly below the negative ion concentration detector, and then pour in the atomizing liquid until the liquid level reaches 75% of the atomizing core thickness.

[0075] 4. Repeat step 2 to measure the negative ion concentration ρ1 in the non-working state;

[0076] 5. Connect the heating trajectory electrode of the atomizing core to the constant power power supply with resistance detection. After adjusting the power supply to 7W, turn on the power supply to perform atomization. Continuously atomize for 10 seconds and measure the negative ion concentration during the working time. Repeat the measurement 10 times and take the average value to obtain the negative ion concentration ρ2 during the working time.

[0077] 6. Calculate the negative ion release rate under non-working and working conditions respectively. Δρ1=ρ1-ρ0, Δρ2=ρ2-ρ0 are the negative ion release rates of the porous ceramic atomizing core under non-working and working conditions respectively.

[0078] 7. Detailed physical property test results are shown in the table below:

[0079] Performance parameters Parameter range Non-working hour negative oxygen ion release rate (at rest) ≥500 ion / cc Negative oxygen ion release rate during working hours (electric atomization) ≥800 ion / cc Compressive strength (test method according to national standard) ≥80 N Open porosity (solid density meter) 50%~60% Average pore size (bubble pressing method) 3~15 micrometers Maximum pore size (bubble pressing method) <35 micrometers Thermal conductivity (test method according to national standard) 0.3~0.8 W / (m·K) Food hygiene and safety (by a third-party authoritative organization) Compliant with FDA, California Proposition 65 and REACH standards

[0080] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A negative ion functionalized ceramic membrane slurry, characterized in that, The components comprise the following mass fractions: Negative ion functional components: 50-70% 10-15% pore-forming agent Adhesive 5~10% Organic carrier component 15-25%; Based on a 100% mass fraction of negative ion functional components, the negative ion functional components comprise the following raw materials by mass fraction: Light rare earth powder 10~45% Tourmaline balance; The light rare earth element is selected from at least one of cerium, lanthanum, praseodymium, neodymium, cerium oxide, lanthanum oxide, praseodymium oxide, or neodymium oxide; Based on an organic carrier component mass fraction of 100%, the organic carrier component comprises the following raw materials by mass fraction: Ethyl cellulose 1~5% Lecithin 0.5-5% Hydrogenated castor oil 0.1-5% Borneol 0.1~5% Solvent balance; The solvent is selected from at least one of diethylene glycol butyl ether acetate, dibutyl phthalate, terpineol, and turpentine. The binder is lead-free glass powder or SiO2-containing ceramic powder; The pore-forming agent is selected from at least one of polymer microspheres, starch, activated carbon powder, graphite powder, and dolomite powder; The polymer microspheres are selected from at least one of polymethyl methacrylate microspheres, polystyrene microspheres, or polytetrafluoroethylene microspheres.

2. The method for preparing the negative ion functionalized ceramic membrane slurry according to claim 1, characterized in that, Includes the following steps: Preparation of organic carrier: Weigh the solvent, ethyl cellulose, lecithin, hydrogenated castor oil and borneol according to the predetermined weight ratio, place them in a reaction vessel, heat to 85-95℃ in a water bath, and stir at high speed until there are no suspended matter in the vessel; Preparation of functional phase mixture: Weigh tourmaline powder with D50 < 10 micrometers and D97 < 30 micrometers, light rare earth powder with D50 < 5 micrometers and D97 < 10 micrometers, and pore-forming agent powder with 15 micrometers ≤ D50 ≤ 40 micrometers according to a predetermined weight ratio, and mix them in an all-round mixer for 3-6 hours. Preparation: Weigh the organic carrier, functional phase mixture, and binder powder according to the predetermined weight ratio, and mix them evenly to obtain the negative ion functionalized ceramic membrane slurry. in, The solvent is selected from at least one of diethylene glycol butyl ether acetate, dibutyl phthalate, terpineol, and turpentine. The light rare earth element is selected from at least one of cerium, lanthanum, praseodymium, neodymium, cerium oxide, lanthanum oxide, praseodymium oxide, or neodymium oxide; The pore-forming agent is selected from at least one of polymer microspheres, starch, activated carbon powder, graphite powder, and dolomite powder; the polymer microspheres are selected from at least one of polymethyl methacrylate microspheres, polystyrene microspheres, or polytetrafluoroethylene microspheres. The binder is lead-free glass powder or SiO2-containing ceramic powder.

3. A negative ion functionalized porous ceramic matrix, characterized in that, It includes a porous ceramic substrate and a negative ion functionalized film layer disposed on the surface of the substrate, wherein the negative ion functionalized film layer is formed by sintering the negative ion functionalized ceramic film slurry of claim 1 onto the surface of the substrate.

4. A method for preparing a negative ion functionalized porous ceramic matrix, characterized in that, Includes the following steps: Preparation of ceramic blanks: Based on 100 parts by weight, take 50-70 parts of paraffin wax, 5-20 parts of polyethylene, 5-20 parts of polypropylene, and 1-10 parts of stearic acid. Heat and melt them at 130-150℃, then use a high-speed disperser to mix them evenly at a speed of 800-1200 rad / min to obtain an organic continuous phase. Based on 100 parts by weight, take 20-60 parts of organic continuous phase, melt it at 120-140°C, add 20-40 parts of diatomaceous earth powder, 10-30 parts of pore-forming agent powder, and 5-20 parts of clay powder, mix and knead evenly at 120-140°C, and then mold it into a green body by injection molding, hot pressing, or extrusion. Preparation of porous ceramic matrix: After the green body is debinded, it is sintered at 900~1100℃ for 1~3 hours, and then ground and ultrasonically cleaned to obtain a porous ceramic matrix. Negative ion functionalization: The negative ion functionalized ceramic film slurry obtained in claim 3 is printed onto a porous ceramic substrate by thick film printing and sintered in air at 800~1100℃ to obtain a negative ion functionalized porous ceramic substrate.

5. The preparation method according to claim 4, characterized in that, The pore-forming agent is selected from at least one of polymer microspheres, starch, activated carbon, graphite, and dolomite; the polymer microspheres are selected from at least one of polymethyl methacrylate microspheres, polystyrene microspheres, or polytetrafluoroethylene microspheres.

6. The preparation method according to claim 4, characterized in that, The soil material is clay, kaolin, and / or metakaolin.

7. A negative ion functionalized porous ceramic atomizing core, characterized in that, It includes the negative ion functionalized porous ceramic matrix as described in claim 3, and the conductive heating trajectory disposed on the surface of the matrix.

8. A method for preparing a negative ion functionalized porous ceramic atomizing core, characterized in that, The conductive heating material for the atomizer is applied to the surface of the negative ion functionalized porous ceramic substrate prepared in claim 4 using a thick film printing or coating process to form a conductive heating trajectory.

Images