CN108893009B - High-temperature-resistant high-thermal-conductivity non-stick coating and preparation method and application thereof - Google Patents
High-temperature-resistant high-thermal-conductivity non-stick coating and preparation method and application thereof Download PDFInfo
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- CN108893009B CN108893009B CN201810820755.4A CN201810820755A CN108893009B CN 108893009 B CN108893009 B CN 108893009B CN 201810820755 A CN201810820755 A CN 201810820755A CN 108893009 B CN108893009 B CN 108893009B
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- aluminum oxide
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- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C09D127/16—Homopolymers or copolymers of vinylidene fluoride
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract
The invention provides a high-temperature-resistant high-heat-conductivity non-stick coating which is prepared from the following raw materials in parts by weight: 100 portions and 120 portions of aluminum oxide/red phosphorus modified fluororesin; 50-70 parts of polyphenylene sulfide; 50-70 parts of graphene powder; 30-50 parts of carbon fiber; 40-70 parts of polylactic acid; 20-30 parts of heat-conducting inorganic filler; 10-20 parts of a coupling agent; 20-30 parts of an auxiliary agent; the auxiliary agent consists of a flatting agent, a defoaming agent, a film forming agent, an antioxidant, a preservative and ceramic powder. The high-temperature-resistant high-heat-conductivity non-stick coating prepared by the invention has wide raw material sources, the preparation method is simple and controllable, and the prepared coating can be used at the high temperature of 400-500 ℃ for a long time without influencing the performance, thereby having wide application prospect.
Description
Technical Field
The invention relates to the technical field of high polymer coatings, and particularly relates to a high-temperature-resistant high-thermal-conductivity non-stick coating.
Background
The non-stick coating has very low surface tension, so that other substances are difficult to adhere to the surface, and the non-stick pan manufactured by the non-stick coating brings great convenience to the life of people since the appearance of the non-stick pan. The non-stick pan is divided into an aluminum pan, a stainless steel pan and an iron pan according to the base material. The aluminum pot has the characteristics of excellent heat distribution, 16 times of heat transfer effect as that of a stainless steel pot, and lighter pot body. But the aluminum pot is not easy to clean and has large oil smoke when using much oil. Stainless steel pans are characterized by poor heat distribution and easy generation of hot spots to burn food. The stainless steel pot is heavy, difficult to clean and easy to smoke when using much oil. The iron enamel pot has poor heat distribution and is easy to be burnt at the bottom. Such pots are not easy to clean and the surface is easy to break, resulting in rusting of the iron base material. The iron pan has poor heat distribution, is easy to generate heat points to burn food, is heavy, is not easy to clean, is easy to rust, and has large oil smoke when using much oil. Therefore, the current coating non-stick pan adopts aluminum or aluminum alloy as a pan base because of the good heat-conducting property of the metal. But the aluminum product directly contacts with food, and the health of the body is influenced to a certain extent. However, the stainless steel pot and the iron pot which are used as the base materials are poor in heat distribution of the non-stick pot, so that heat accumulation points are easily caused, the coating film is cracked, food is burnt, and the service life of the coating is greatly shortened.
The non-stick pan in the market at present is mainly characterized in that a layer of polyfluoro resin non-stick coating is sprayed on the surface of the non-stick pan, the non-stick of food is realized by the characteristics of strong hydrophobicity and low friction coefficient, the non-stick pan can meet the requirement that the food is not stuck in the cooking process of people, but the non-stick pan has a plurality of defects. Firstly, the strength of the polytetrafluoroethylene coating is poor, the polytetrafluoroethylene coating is easy to fall off and damage, and the polytetrafluoroethylene coating can be softened in the cooking process, and only a wooden shovel can be used, and hard food cannot be cooked; meanwhile, the non-stick pan is not suitable for cooking acidic food, otherwise, the service life of the non-stick pan is influenced; in addition, the service temperature of the polytetrafluoroethylene coating cannot exceed 250 ℃ generally, and people are difficult to control strictly when using the polytetrafluoroethylene coating and are easy to damage due to dry burning. Whether the polytetrafluoroethylene coating non-stick pan is harmful to human health or not in the using process is controversial, and controversial is continuously initiated; and once the non-stick coating falls off, the non-stick property is greatly reduced.
Polyphenylene Sulfide (PPS) is a high temperature resistant resin binder with excellent overall properties. It has high crystallinity, low linear expansion coefficient, no solvent solubility below 170 deg.c, and other advantages.
Chinese patent publication No. CN103740192A discloses a graphene-modified fluororesin coating, wherein graphene is adopted to improve the strength of the fluororesin coating, the friction resistance of the fluororesin coating is obviously improved, and the adhesive force, impact resistance and thermal conductivity of the fluororesin coating with a base material are obviously improved. The graphene composite material has the disadvantages that although the wear resistance and the thermal conductivity can be improved by adding the graphene, the high temperature resistance and the thermal conductivity are still insufficient.
Therefore, the development of a non-stick coating suitable for the requirements of high temperature resistance and high heat conductivity of non-stick pan is urgently needed to meet the requirements of modern market on the field.
Disclosure of Invention
In order to solve the technical problems, the invention provides a high-temperature-resistant high-thermal-conductivity non-stick coating and a preparation method and application thereof, and aims to provide the high-temperature-resistant high-thermal-conductivity non-stick coating, and the coating has very good high-temperature resistance by adding the prepared aluminum oxide/red phosphorus modified fluororesin, can be used at the high temperature of 400-; by adding the inorganic heat conduction material, the non-stick coating has good heat conduction performance and no toxic or side effect.
The invention provides a high-temperature-resistant high-heat-conductivity non-stick coating which is prepared from the following raw materials in parts by weight:
100 portions and 120 portions of aluminum oxide/red phosphorus modified fluororesin;
50-70 parts of polyphenylene sulfide;
50-70 parts of graphene powder;
30-50 parts of carbon fiber;
40-70 parts of polylactic acid;
20-30 parts of heat-conducting inorganic filler;
10-20 parts of a coupling agent;
20-30 parts of an auxiliary agent;
the auxiliary agent consists of a flatting agent, a defoaming agent, a film forming agent, an antioxidant, a preservative and ceramic powder;
the aluminum oxide/red phosphorus modified fluororesin is prepared by the following method:
adding a mixed solvent consisting of dimethylformamide and xylene into a reaction kettle, adding fluororesin, heating to 120 ℃ for 100 ℃ and stirring for 30min, adding a small amount of isobutanol as a dispersing agent after the resin is completely dissolved, fully dispersing on a magnetic stirrer, introducing nitrogen for protection, adding a silane coupling agent DL171, aluminum oxide and red phosphorus, stirring for 60-90min at a heat preservation temperature, filtering, washing with ethanol, and drying at 60-70 ℃ in vacuum to obtain the composite material;
the mass ratio of the fluororesin to the aluminum oxide to the red phosphorus is 10: (2-4): (1-2).
As a further improvement of the invention, the health-care food is prepared from the following raw materials in parts by weight:
112 parts of aluminum oxide/red phosphorus modified fluororesin;
65 parts of polyphenylene sulfide;
graphene 61 powder;
45 parts of carbon fiber;
60 parts of polylactic acid;
27 parts of heat-conducting inorganic filler;
15 parts of a coupling agent;
and 24 parts of an auxiliary agent.
As a further improvement of the invention, the non-stick coating is stable at high temperatures of 400-500 ℃.
As a further improvement of the invention, the coupling agent is selected from one of aluminate, silane and borate coupling agent, preferably silane coupling agent, and the silane coupling agent is selected from one or more of gamma-aminopropyltriethoxysilane, gamma-aminopropyltrimethoxysilane, gamma- (beta-aminoethyl) aminopropyltrimethoxysilane, gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane, gamma- (2, 3-epoxypropoxy) propyltriethoxysilane, beta- (3, 4-epoxycyclohexyl) ethyltrimethoxysilane, gamma-mercaptopropyltrimethoxysilane and gamma-mercaptopropyltriethoxysilane.
As a further improvement of the invention, the auxiliary agent is prepared by combining the following raw materials in percentage by mass: 22% of leveling agent, 13% of defoaming agent, 15% of film forming agent, 15% of antioxidant, 20% of preservative and 10% of ceramic powder;
the leveling agent is selected from one or more of polyacrylic acid, carboxymethyl cellulose, polydimethylsiloxane, silicone oil or polyether polyester modified organic siloxane;
the defoaming agent is selected from one or more of emulsified silicone oil, a higher alcohol fatty acid ester compound, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether, polyoxypropylene polyoxyethylene glycerol ether and polydimethylsiloxane;
the film forming agent is selected from one or more of acrylic resin modified casein, acrylic resin polyurethane copolymer resin, polyethylene or acrylic ester modified butadiene resin and polyurethane modified nitrocellulose;
the antioxidant is selected from one or more of diphenylamine, p-phenylenediamine, dihydroquinoline, 2, 6-tertiary butyl-4-methylphenol, bis (3, 5-tertiary butyl-4-hydroxyphenyl) thioether, tetra [ beta- (3, 5-tertiary butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, didodecanol ester, ditetradecanol ester, dioctadecyl ester, trioctyl ester, tridecanol ester, tridodecyl alcohol ester and trihexadecyl alcohol ester;
the preservative is selected from one or more of potassium sorbate, sorbic acid, deoxyacetic acid, deoxysodium acetate, methylparaben, ethylparaben, propylparaben, butylparaben, sodium diacetate, calcium propionate and sodium lactate.
As a further improvement of the invention, the heat-conducting inorganic filler is one or more selected from zinc oxide, aluminum oxide, magnesium oxide, silicon dioxide, beryllium oxide, boron nitride, silicon carbide and silicon nitride.
As a further improvement of the invention, the fluororesin is one or more selected from polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinylidene fluoride, ethylene-tetrafluoroethylene copolymer, ethylene-chlorotrifluoroethylene copolymer and polyvinyl fluoride.
The invention further protects the preparation method of the high-temperature-resistant high-thermal-conductivity non-stick coating, which comprises the following steps: adding aluminum oxide/red phosphorus modified fluororesin, polyphenylene sulfide and polylactic acid into an organic solvent, dispersing for 30min by an ultrasonic dispersion machine to uniformly disperse the aluminum oxide/red phosphorus modified fluororesin, adding heat-conducting inorganic filler, graphene, carbon fiber and an auxiliary agent, dispersing for 30min by ultrasonic again, adding a coupling agent, heating to 100 ℃, and then stirring for 30min by magnetic force to obtain a finished coating.
The invention further protects the application of the high-temperature-resistant high-heat-conductivity non-stick coating, the finished coating is sprayed on a metal material which has been subjected to oil and rust removal, the thickness of a paint film is 16-17 mu m, the paint film is placed for 10 days at normal temperature, and the non-stick coating is obtained after the paint film is dried.
As a further improvement of the invention, the hardness of the anti-sticking coating is 4HV, and the adhesion is grade 1.
The invention has the following beneficial effects:
1. the aluminum oxide/red phosphorus modified fluororesin prepared by the invention has very good high temperature resistance by modifying the inorganic composite material aluminum oxide/red phosphorus, can be used at the high temperature of 400-;
2. according to the invention, the inorganic heat conduction material graphene, the carbon fiber and the heat conduction inorganic filler are added, so that the prepared non-stick coating has good heat conduction performance and no toxic or side effect;
3. the invention has wide raw material source, simple and controllable preparation method and easy realization of industrial application.
Drawings
FIG. 1 is a process diagram for preparing a high temperature resistant high thermal conductivity non-stick coating.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the embodiments described are only some representative embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1 preparation of high temperature resistant high thermal conductivity non-stick coating
The raw materials comprise:
100 parts of aluminum oxide/red phosphorus modified fluororesin;
50 parts of polyphenylene sulfide;
50 parts of graphene powder;
30 parts of carbon fiber;
40 parts of polylactic acid;
10 parts of boron nitride and 10 parts of silicon carbide;
10 parts of gamma-mercaptopropyl trimethoxy silane;
20 parts of an auxiliary agent;
the auxiliary agent is prepared from the following raw materials in percentage by mass: 22% of polyether polyester modified organic siloxane, 13% of polyoxypropylene glycerol ether, 15% of acrylic resin polyurethane copolymer resin, 15% of tetra [ beta- (3, 5-tertiary butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 20% of propyl p-hydroxybenzoate and 10% of ceramic powder.
The aluminum oxide/red phosphorus modified fluororesin is prepared by the following method:
adding a mixed solvent consisting of dimethylformamide and xylene into a reaction kettle, adding 100g of fluororesin, heating to 100 ℃, stirring for 30min, adding a small amount of isobutanol as a dispersing agent after the resin is completely dissolved, fully dispersing on a magnetic stirrer, introducing nitrogen for protection, adding a silane coupling agent DL171, 20g of aluminum oxide and 10g of red phosphorus, keeping the temperature and stirring for 60min, filtering, washing with ethanol, and drying at 60 ℃ in vacuum to obtain the composite material.
Preparing a high-temperature-resistant high-heat-conductivity non-stick coating: adding aluminum oxide/red phosphorus modified fluororesin, polyphenylene sulfide and polylactic acid into an organic solvent, dispersing for 30min by an ultrasonic dispersion machine to uniformly disperse the aluminum oxide/red phosphorus modified fluororesin, adding heat-conducting boron nitride, silicon carbide, graphene, carbon fiber and an auxiliary agent, further dispersing for 30min by ultrasonic, adding gamma-mercaptopropyl trimethoxy silane, heating to 100 ℃, and then stirring for 30min by magnetic force to obtain a coating finished product.
And spraying the paint finished product on the metal material which has been subjected to oil and rust removal, wherein the thickness of a paint film is 16 mu m, standing for 10 days at normal temperature, and drying the paint film to obtain the non-stick coating.
Example 2 preparation of high temperature resistant high thermal conductivity non-stick coating
The raw materials comprise:
120 parts of aluminum oxide/red phosphorus modified fluororesin;
70 parts of polyphenylene sulfide;
graphene 70 powder;
50 parts of carbon fiber;
70 parts of polylactic acid;
30 parts of silicon dioxide;
20 parts of gamma-aminopropyltriethoxysilane;
30 parts of an auxiliary agent;
the auxiliary agent is prepared from the following raw materials in percentage by mass: 22% of polyether polyester modified organic siloxane, 13% of polyoxypropylene glycerol ether, 15% of polyurethane modified nitrocellulose, 15% of dioctadecyl alcohol ester, 20% of propyl p-hydroxybenzoate and 10% of ceramic powder.
The aluminum oxide/red phosphorus modified fluororesin is prepared by the following method:
adding a mixed solvent consisting of dimethylformamide and xylene into a reaction kettle, adding 100g of polyvinylidene fluoride, heating to 120 ℃, stirring for 30min, adding a small amount of isobutanol as a dispersing agent after the polyvinylidene fluoride is completely dissolved, fully dispersing on a magnetic stirrer, introducing nitrogen for protection, adding silane coupling agent DL171, 40g of aluminum oxide and 20g of red phosphorus, preserving heat, stirring for 90min, filtering, washing with ethanol, and vacuum-drying at 70 ℃ to obtain the composite material.
Preparing a high-temperature-resistant high-heat-conductivity non-stick coating: adding aluminum oxide/red phosphorus modified fluororesin, polyphenylene sulfide and polylactic acid into an organic solvent, dispersing for 30min by an ultrasonic dispersion machine to uniformly disperse the aluminum oxide/red phosphorus modified fluororesin, adding heat-conducting silicon dioxide, graphene, carbon fiber and an auxiliary agent, dispersing for 30min by ultrasonic, adding gamma-aminopropyltriethoxysilane, heating to 100 ℃, and stirring for 30min by magnetic force to obtain a finished coating.
And spraying the paint finished product on the metal material which has been subjected to oil and rust removal, wherein the thickness of a paint film is 17 mu m, standing for 10 days at normal temperature, and drying the paint film to obtain the non-stick coating.
Example 3 preparation of high temperature resistant high thermal conductivity non-stick coating
The raw materials comprise:
112 parts of aluminum oxide/red phosphorus modified fluororesin;
65 parts of polyphenylene sulfide;
graphene 61 powder;
45 parts of carbon fiber;
60 parts of polylactic acid;
15 parts of zinc oxide and 12 parts of aluminum oxide;
15 parts of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane;
24 parts of an auxiliary agent;
the auxiliary agent is prepared from the following raw materials in percentage by mass: 22% of polyacrylic acid, 13% of silicone emulsion, 15% of acrylate modified butadiene resin, 15% of bis (3, 5-tertiary butyl-4-hydroxyphenyl) thioether, 10% of potassium sorbate, 10% of sorbic acid and 10% of ceramic powder.
The aluminum oxide/red phosphorus modified fluororesin is prepared by the following method:
adding a mixed solvent consisting of dimethylformamide and xylene into a reaction kettle, adding 100g of tetrafluoroethylene, heating to 110 ℃, stirring for 30min, adding a small amount of isobutanol as a dispersing agent after the tetrafluoroethylene is completely dissolved, fully dispersing on a magnetic stirrer, introducing nitrogen for protection, adding a silane coupling agent DL171, 30g of aluminum oxide and 15g of red phosphorus, preserving heat, stirring for 70min, filtering, washing with ethanol, and vacuum-drying at 65 ℃ to obtain the composite material.
Preparing a high-temperature-resistant high-heat-conductivity non-stick coating: adding aluminum oxide/red phosphorus modified fluororesin, polyphenylene sulfide and polylactic acid into an organic solvent, dispersing for 30min by an ultrasonic dispersion machine to uniformly disperse the aluminum oxide/red phosphorus modified fluororesin, adding zinc oxide, aluminum oxide, graphene, carbon fiber and an auxiliary agent, dispersing for 30min by ultrasonic again, adding gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane, heating to 100 ℃, and stirring for 30min by magnetic force to obtain a coating finished product.
And spraying the paint finished product on the metal material which has been subjected to oil and rust removal, wherein the thickness of a paint film is 16 mu m, standing for 10 days at normal temperature, and drying the paint film to obtain the non-stick coating.
Comparative example 1A highly heat-conductive, highly abrasion-resistant, non-stick coating composition according to patent ZL 201610035103.0
(1) Preparation of sulfonated polyether ether ketone
Uniformly mixing 10g of polyether ether ketone and 10g of chlorosulfonic acid, heating to 120 ℃, reacting for 72 hours, pouring into 100g of cold water at 5 ℃, standing for 1 hour, washing with distilled water until the pH value of washing liquor is 6-7, and performing vacuum drying at 50 ℃ in a vacuum drying oven to obtain the sulfonated polyether ether ketone.
(2) Preparation of non-stick coating
5g of silicon carbide, 5g of carbon black, 1g of dispersing agent, 0.5g of defoaming agent, 1g of graphene, 11g of deionized water and 1g of NMP1g are uniformly mixed and ground to the required particle size, and then SPEEK10g, 40g of PTFE emulsion, 20g of PES resin, 0.5g of thickening agent and 5g of AMP-95(pH regulator) prepared in the step 1) are added and uniformly stirred to obtain the high-thermal-conductivity high-wear-resistance non-stick coating.
(3) Spraying to stainless steel base material
The wear-resistant scratch-resistant long-life non-stick coating is sprayed on the stainless steel surface treated by sand blasting by a spray gun, the thickness of the coating is controlled at 30 mu m, the sprayed coating is dried at 100 ℃ for 40min and then plasticized at 410 ℃ for 40 min.
Test example 1 Performance test
The high-temperature-resistant high-thermal-conductivity non-stick paint prepared in the embodiments 1 to 3 of the invention and the high-thermal-conductivity high-wear-resistance non-stick paint prepared in the comparative example 1 are coated on a stainless steel substrate according to requirements, and the performances of the non-stick paint are tested by combining a commercially available stainless steel non-stick pan.
The friction and wear performance is tested by an MHK-500A type testing machine, and the test conditions are as follows: load 312N, speed 2.5m/s, based on the coating being completely worn through, the friction factor is calculated from the formula (wear is expressed as the friction travel to which a unit film thickness is subjected); the adhesion of the coating is measured by a Q65-67 type adhesion tester; the impact strength of the coating is measured by an impact tester of 0153-3K1 type; coating flexibility was measured using a model QTX-1 flexibility tester; the anti-adhesion of the coating was measured by the dropping method using a CA-A contact angle meter; the Vickers hardness is measured by an HD-G803-4HV-10Z automatic turret Vickers hardness tester, a load within 120kg and a diamond square cone presser with an apex angle of 136 degrees are pressed into the surface of the material, and the surface area of a material indentation pit is divided by the load value; thermal conductivity was measured with a ZH 1800 thermal conductivity tester. Unless otherwise specified, samples of the coated performance test were made using a grit blasted stainless steel substrate.
The test results are shown in Table 1.
Table 1 table of test results of each group
As can be seen from the above table, the coatings obtained from the high temperature resistant high thermal conductivity non-stick coatings prepared in embodiments 1 to 3 of the present invention have better high temperature resistance, wear resistance, high thermal conductivity and mechanical properties than the coatings of the non-stick pan sold in the comparative example and the non-stick pan sold in the market: abrasion resistance (830-860 m/mum), film formation smoothness, adhesion level 1, impact strength (82-85 kg-cm), thermal conductivity (1890-1920W/m-K) and hardness 4 HV. Therefore, the method has better market prospect.
Various modifications may be made to the above without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is therefore intended to be limited not by the above description, but rather by the scope of the appended claims.
Claims (10)
1. The high-temperature-resistant high-thermal-conductivity non-stick coating is characterized by being prepared from the following raw materials in parts by weight:
100 portions and 120 portions of aluminum oxide/red phosphorus modified fluororesin;
50-70 parts of polyphenylene sulfide;
50-70 parts of graphene powder;
30-50 parts of carbon fiber;
40-70 parts of polylactic acid;
20-30 parts of heat-conducting inorganic filler;
10-20 parts of a coupling agent;
20-30 parts of an auxiliary agent;
the auxiliary agent consists of a flatting agent, a defoaming agent, a film forming agent, an antioxidant, a preservative and ceramic powder;
the aluminum oxide/red phosphorus modified fluororesin is prepared by the following method:
adding a mixed solvent consisting of dimethylformamide and xylene into a reaction kettle, adding fluororesin, heating to 120 ℃ for 100 ℃ and stirring for 30min, adding a small amount of isobutanol as a dispersing agent after the resin is completely dissolved, fully dispersing on a magnetic stirrer, introducing nitrogen for protection, adding a silane coupling agent DL171, aluminum oxide and red phosphorus, stirring for 60-90min at a heat preservation temperature, filtering, washing with ethanol, and drying at 60-70 ℃ in vacuum to obtain the composite material;
the mass ratio of the fluororesin to the aluminum oxide to the red phosphorus is 10: (2-4): (1-2).
2. The high-temperature-resistant high-thermal-conductivity non-stick coating as claimed in claim 1, which is prepared from the following raw materials in parts by weight:
112 parts of aluminum oxide/red phosphorus modified fluororesin;
65 parts of polyphenylene sulfide;
graphene 61 powder;
45 parts of carbon fiber;
60 parts of polylactic acid;
27 parts of heat-conducting inorganic filler;
15 parts of a coupling agent;
and 24 parts of an auxiliary agent.
3. The non-stick coating with high temperature resistance and high thermal conductivity as claimed in claim 1, wherein the non-stick coating is stable at a temperature of 400 ℃ and 500 ℃.
4. The high temperature resistant high thermal conductivity non-stick coating of claim 1, wherein the coupling agent is selected from one of aluminate, silane, borate coupling agent.
5. The high temperature resistant high thermal conductive non-stick coating of claim 4, wherein the silane coupling agent is selected from one or more of gamma-aminopropyltriethoxysilane, gamma-aminopropyltrimethoxysilane, gamma- (beta-aminoethyl) aminopropyltrimethoxysilane, gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane, gamma- (2, 3-epoxypropoxy) propyltriethoxysilane, beta- (3, 4-epoxycyclohexyl) ethyltrimethoxysilane, gamma-mercaptopropyltrimethoxysilane, and gamma-mercaptopropyltriethoxysilane.
6. The high-temperature-resistant high-thermal-conductivity non-stick coating material as claimed in claim 1, wherein the thermal-conductive inorganic filler is one or more selected from zinc oxide, aluminum oxide, magnesium oxide, silicon dioxide, beryllium oxide, boron nitride, silicon carbide and silicon nitride.
7. The high-temperature-resistant high-thermal-conductivity non-stick coating according to claim 1, wherein the fluororesin is one or more selected from polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinylidene fluoride, ethylene-tetrafluoroethylene copolymer, ethylene-chlorotrifluoroethylene copolymer and polyvinyl fluoride.
8. The preparation method of the high-temperature-resistant high-thermal-conductivity non-stick coating according to any one of claims 1 to 7, characterized by comprising the following steps: adding aluminum oxide/red phosphorus modified fluororesin, polyphenylene sulfide and polylactic acid into an organic solvent, dispersing for 30min by an ultrasonic dispersion machine to uniformly disperse the aluminum oxide/red phosphorus modified fluororesin, adding heat-conducting inorganic filler, graphene, carbon fiber and an auxiliary agent, dispersing for 30min by ultrasonic again, adding a coupling agent, heating to 100 ℃, and then stirring for 30min by magnetic force to obtain a finished coating.
9. The application of the high-temperature-resistant high-heat-conductivity non-stick coating as claimed in any one of claims 1 to 7, wherein the finished coating is sprayed on a metal material which has been subjected to oil and rust removal, the thickness of a paint film is 16-17 μm, the paint film is placed at normal temperature for 10 days, and the non-stick coating is obtained after the paint film is dried.
10. The use of a high temperature resistant, high thermal conductivity, non-stick coating according to claim 9 wherein the release coating has a hardness of 4HV and an adhesion rating of 1.
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| CN109836965A (en) * | 2018-12-27 | 2019-06-04 | 宁波中一石化科技股份有限公司 | Thermostable heat-conductive coating and preparation method thereof |
| CN109749404A (en) * | 2019-01-12 | 2019-05-14 | 莫爱军 | A kind of high-temperature stability electronic packaging composite material of high heat conductance and preparation method thereof |
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| CN114539856A (en) * | 2020-11-27 | 2022-05-27 | 无锡康庭氟塑材料科技有限公司 | Non-stick coating and preparation method and application thereof |
| CN113337176B (en) * | 2021-05-14 | 2022-09-02 | 宁波格莱美厨具有限公司 | Non-stick pan coating based on interpenetrating network structure and preparation method thereof |
| CN116285606A (en) * | 2023-01-07 | 2023-06-23 | 河北悠扬时代环保科技有限公司 | Water-based anticorrosive paint for welding points and preparation method thereof |
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| CN102876040A (en) * | 2012-10-08 | 2013-01-16 | 合肥杰事杰新材料股份有限公司 | Polyphenylene sulfide composite material and preparation method thereof |
| CN105733376B (en) * | 2016-02-23 | 2018-10-30 | 广东四方威凯新材料有限公司 | Weather resistant halogen-free flame retardant anti-corrosion insulation fluorocarbon coating |
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