Composite coating of aluminum alloy non-stick pan and preparation method of composite coating

Abstract

The invention discloses a composite coating of an aluminum alloy non-stick pan and a preparation method of the composite coating. According to the technical scheme, the composite coating is characterized by comprising a coating body, the coating body is prepared from the following raw materials in parts by weight: 5 to 10 parts of nano zinc powder, 10 to 18 parts of nano aluminum oxide powder, 3 to 6 parts of dispersing aid, 8.5 to 9 parts of titanium carbide, 2.5 to 5.5 parts of potassium feldspar, 1.5 to 3.5 parts of calcined kaolin powder, 0.2 to 0.7 part of magnet, 1.2 to 1.4 parts of zirconium oxide, 1 to 2 parts of borax, 1 to 2 parts of nano calcium carbonate, 1 to 2 parts of attapulgite powder, 4 to 5 parts of silica powder, 15 to 30 parts of deionized water, 16 to 42 parts of zinc metal organic framework, 1.5 to 3.5 parts of silane coupling agent, 0.7 to 1.5 parts of additive and 1.6 to 1.6 parts of additive; and 2.5 parts of a suspending agent. The high temperature resistance and corrosion resistance of the enamel coating of the aluminum-based non-stick pan are improved, the phenomenon that the enamel coating of the pan body falls off under the action of high temperature and an acid-base solution is relieved, and meanwhile the enamel coating has the advantages of being high in hardness, good in wear resistance and good in heat conduction performance.

Description

Technical Field

[0001] The invention relates to a non-stick pan coating, and more particularly to a composite coating for an aluminum alloy non-stick pan and a preparation method thereof. Background Art

[0002] A non-stick pan is a pan that prevents food from sticking to the bottom because it has a non-stick coating. The most common and effective non-stick coatings are PTFE and ceramic. The advent of non-stick pans has brought significant convenience to people's lives, eliminating the need to worry about accidentally burning meat when cooking or fish sticking to the pan when frying. These non-stick pans look nothing like regular pans; they simply have an additional layer of PTFE on the inner surface. This popular kitchen appliance leverages PTFE's excellent thermal, chemical, easy-to-clean, and non-toxic properties.

[0003] Because the cost of processing and manufacturing existing non-stick pans using polytetrafluoroethylene is too high, in order to reduce costs, they generally use inferior coatings with poor effects, which reduces the non-stick effect and service life of the non-stick pans, and may even affect human life, health and safety.

[0004] Therefore, a solution needs to be proposed to solve this problem. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a composite coating for aluminum alloy non-stick pans and a preparation method thereof, which improves the high temperature resistance and corrosion resistance of the aluminum-based non-stick pan enamel coating, slows down the phenomenon of coating shedding of the pan enamel coating under the action of high temperature and acid and alkali solutions, and at the same time makes it have the advantages of higher hardness, better wear resistance and good thermal conductivity.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a composite coating for an aluminum alloy non-stick pan, comprising a coating body, wherein the coating body comprises raw materials having the following components by weight: 5 to 10 parts of nano zinc powder, 10 to 18 parts of nano alumina powder, 3 to 6 parts of a dispersing aid, 8.5 to 9 parts of titanium carbide, 2.5 to 5.5 parts of potassium feldspar, 1.5 to 3.5 parts of calcined kaolin powder, 0.2 to 0.7 parts of magnetite, 1.2 to 1.4 parts of zirconium oxide, 1 to 2 parts of borax, 1 to 2 parts of nano calcium carbonate, 1 to 2 parts of attapulgite powder, 4 to 5 parts of silicon powder, 15 to 30 parts of deionized water, 16 to 42 parts of a zinc metal organic framework, 1.5 to 3.5 parts of a silane coupling agent, 0.7 to 1.5 parts of an additive and 1.6 to 2.5 parts of a suspending agent.

[0007] The above technical objectives of the present invention are also achieved by the following technical solutions: A method for preparing a composite coating for an aluminum alloy non-stick pan, comprising the following steps: Step S1: placing the aluminum alloy pan body in a sandblasting machine, using silicon carbide ceramic as shot blasting, performing sandblasting roughening treatment to form an uneven convex structure on the inner surface of the pan body, and then degreasing and cleaning the pan body for later use;

[0008] Step S2: weighing 5 to 10 parts of nano zinc powder, 10 to 18 parts of nano alumina powder, 3 to 6 parts of dispersing aid, 8.5 to 9 parts of titanium carbide, 2.5 to 5.5 parts of potassium feldspar, 1.5 to 3.5 parts of calcined kaolin powder, 0.2 to 0.7 parts of magnetite, 1.2 to 1.4 parts of zirconium oxide, 1 to 2 parts of borax, 1 to 2 parts of nano calcium carbonate, 1 to 2 parts of attapulgite powder and 4 to 5 parts of silicon powder in parts by weight, and grinding in a high-speed ball mill. After grinding for 12 hours, sieving with a 300-500 mesh sieve, taking 20-30 parts of the sieve under the sieve and uniformly mixing with 15-30 parts of deionized water, then sequentially adding 16-42 parts of zinc metal organic framework and 1.5-3.5 parts of silane coupling agent, continuing to stir for 30-90 minutes, uniformly coating the inner surface of the metal pot in step S1, placing it in a muffle furnace and heating it to 300-500° C., and calcining it for 0.5-3 hours to obtain a non-stick pan bottom layer;

[0009] Step S3: Weigh 8 to 12 parts by weight of silane-modified nano-silica sol; then add 0.7 to 1.5 parts of additives and 1.6 to 2.5 parts of suspending agent, stir and mix evenly, apply it on the non-stick pan bottom layer of step S2, and perform UV curing and oven drying in sequence to obtain the composite ceramic non-stick pan coating.

[0010] The present invention is further configured such that the dispersing aid is at least one of ethanol, isopropyl alcohol, polyvinyl alcohol, and polyethylene glycol.

[0011] The present invention is further configured as follows: the silane coupling agent is at least one of vinyltriethoxysilane, vinyltrimethoxysilane, and vinyltri(β-methoxyethoxy)silane.

[0012] The present invention is further configured as follows: the zinc metal organic framework is prepared by a solvothermal reaction of zinc nitrate and 1,3,5-tris(3-fluoro-4-formylphenyl)benzene in a solvent at a molar ratio of 12:2-3.

[0013] In summary, the present invention has the following beneficial effects:

[0014] 1. The present invention improves the high temperature resistance and corrosion resistance of the enamel coating of the aluminum-based non-stick pan, slows down the phenomenon of the enamel coating of the pan body falling off under the action of high temperature and acid and alkali solution, and at the same time makes it have the advantages of higher hardness, better wear resistance and good thermal conductivity;

[0015] 2. The present invention uses the synergistic effect of the zinc metal organic framework and zinc powder, and uses the zinc metal organic framework as a carrier to uniformly disperse the zinc powder in the base coating. The obtained base coating not only has good antibacterial properties, but also has strong bonding with the metal pot body, a dense coating, and stronger high-temperature resistance after high-temperature calcination. DETAILED DESCRIPTION

[0016] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other unless there is a conflict.

[0017] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "sleeved / connected," and "connected" should be understood in a broad sense. For example, "connected" can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium; and it can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0018] The present invention is described in detail below.

[0019] Example 1: A composite coating for an aluminum alloy non-stick pan, comprising a coating body, which comprises the following raw materials by weight: 5 parts of nano-zinc powder, 10 parts of nano-alumina powder, 3 parts of a dispersing aid, 8.5 parts of titanium carbide, 2.5 parts of potassium feldspar, 1.5 parts of calcined kaolin powder, 0.2 parts of magnetite, 1.2 parts of zirconium oxide, 1 part of borax, 1 part of nano-calcium carbonate, 1 part of attapulgite powder, 4 parts of silicon powder, 15 parts of deionized water, 16 parts of zinc metal organic framework, 1.5 parts of a silane coupling agent, 0.7 parts of an additive, and 1.6 parts of a suspending agent.

[0020] A method for preparing a composite coating for an aluminum alloy non-stick pan comprises the following steps: Step S1: placing the aluminum alloy pan body in a sandblasting machine, using silicon carbide ceramic as shot blasting, performing sandblasting roughening treatment to form an uneven convex structure on the inner surface of the pan body, and then degreasing and cleaning the pan body for later use;

[0021] Step S2: According to the above weight parts, nano zinc powder, nano alumina powder, dispersing aid, titanium carbide, potassium feldspar, calcined kaolin powder, magnetite, zirconium oxide, borax, nano calcium carbonate, attapulgite powder and silicon powder are weighed, ball milled in a high-speed ball mill for 12 hours, sieved through a 300-500 mesh sieve, 20 parts of the sieve under the sieve are mixed evenly with 15 parts of deionized water, and then zinc metal organic framework and silane coupling agent are added in sequence. After stirring for 30 minutes, the mixture is evenly coated on the upper surface of the metal pot body in step S1, and placed in a muffle furnace and programmed to heat to 300° C. and calcined for 3 hours to obtain an enamel non-stick pan bottom layer;

[0022] Step S3: Weigh 8 parts by weight of silane-modified nano-silica sol; add additives and suspending agent, stir and mix evenly, apply it on the non-stick pan bottom layer of step S2, and perform UV curing and oven drying in sequence to obtain a composite ceramic non-stick pan coating.

[0023] The dispersing aids are ethanol and polyethylene glycol, and the silane coupling agent is vinyltriethoxysilane.

[0024] The zinc metal organic framework is prepared by solvothermal reaction of zinc nitrate and 1,3,5-tris(3-fluoro-4-formylphenyl)benzene in a solvent at a molar ratio of 12:2.

[0025] Example 2: A composite coating for an aluminum alloy non-stick pan, comprising a coating body, which comprises the following raw materials by weight: 8 parts of nano-zinc powder, 12 parts of nano-alumina powder, 5 parts of a dispersing aid, 8.6 parts of titanium carbide, 4 parts of potassium feldspar, 2 parts of calcined kaolin powder, 0.5 parts of magnetite, 1.3 parts of zirconium oxide, 1.5 parts of borax, 1.3 parts of nano-calcium carbonate, 1.7 parts of attapulgite powder, 4.4 parts of silicon powder, 23 parts of deionized water, 31 parts of zinc metal organic framework, 2 parts of a silane coupling agent, 0.9 parts of an additive, and 2 parts of a suspending agent.

[0026] A method for preparing a composite coating for an aluminum alloy non-stick pan comprises the following steps: Step S1: placing the aluminum alloy pan body in a sandblasting machine, using silicon carbide ceramic as shot blasting, performing sandblasting roughening treatment to form an uneven convex structure on the inner surface of the pan body, and then degreasing and cleaning the pan body for later use;

[0027] Step S2: According to the above weight parts, nano zinc powder, nano alumina powder, dispersing aid, titanium carbide, potassium feldspar, calcined kaolin powder, magnetite, zirconium oxide, borax, nano calcium carbonate, attapulgite powder and silicon powder are weighed, ball milled in a high-speed ball mill for 12 hours, sieved through a 300-500 mesh sieve, and the sieved material is uniformly mixed with deionized water. Then, a zinc metal organic framework and a silane coupling agent are added in sequence, and after continuing to stir for 60 minutes, the mixture is evenly coated on the upper surface of the metal pot body in step S1, and placed in a muffle furnace and programmed to heat to 400° C. and calcined for 2 hours to obtain a non-stick pan bottom layer;

[0028] Step S3: Weigh the silane-modified nano-silica sol in parts by weight; then add additives and suspending agents, stir and mix evenly, apply it on the non-stick pan bottom layer of step S2, and perform UV curing and oven drying in sequence to obtain a composite ceramic non-stick pan coating.

[0029] The dispersing aid is at least one of ethanol, isopropyl alcohol, polyvinyl alcohol and polyethylene glycol.

[0030] The silane coupling agent is at least one of vinyltriethoxysilane, vinyltrimethoxysilane, and vinyltri(β-methoxyethoxy)silane.

[0031] The zinc metal organic framework is prepared by performing a solvothermal reaction of zinc nitrate and 1,3,5-tris(3-fluoro-4-formylphenyl)benzene in a solvent at a molar ratio of 12:2-3.

[0032] Example 3: A composite coating for an aluminum alloy non-stick pan, comprising a coating body, wherein the coating body comprises raw materials having the following components by weight: 10 parts of nano-zinc powder, 18 parts of nano-alumina powder, 6 parts of a dispersing aid, 9 parts of titanium carbide, 5.5 parts of potassium feldspar, 3.5 parts of calcined kaolin powder, 0.7 parts of magnetite, 1.4 parts of zirconium oxide, 2 parts of borax, 2 parts of nano-calcium carbonate, 2 parts of attapulgite powder, 5 parts of silicon micropowder, 30 parts of deionized water, 42 parts of zinc metal organic framework, 3.5 parts of a silane coupling agent, 1.5 parts of an additive, and 2.5 parts of a suspending agent.

[0033] A method for preparing a composite coating for an aluminum alloy non-stick pan comprises the following steps: Step S1: placing the aluminum alloy pan body in a sandblasting machine, using silicon carbide ceramic as shot blasting, performing sandblasting roughening treatment to form an uneven convex structure on the inner surface of the pan body, and then degreasing and cleaning the pan body for later use;

[0034] Step S2: According to the above weight parts, nano zinc powder, nano alumina powder, dispersing aid, titanium carbide, potassium feldspar, calcined kaolin powder, magnetite, zirconium oxide, borax, nano calcium carbonate, attapulgite powder and silicon powder are weighed, ball milled in a high-speed ball mill for 12 hours, sieved through a 300-500 mesh sieve, and the sieved material is evenly mixed with deionized water. Then, a zinc metal organic framework and a silane coupling agent are added in sequence, and stirring is continued for 90 minutes. The mixture is evenly coated on the upper surface of the metal pot body in step S1, and the mixture is placed in a muffle furnace and programmed to be heated to 500° C. and calcined for 3 hours to obtain a non-stick pan bottom layer;

[0035] Step S3: Weigh the silane-modified nano-silica sol in parts by weight; then add additives and suspending agents, stir and mix evenly, apply it on the non-stick pan bottom layer of step S2, and perform UV curing and oven drying in sequence to obtain a composite ceramic non-stick pan coating.

[0036] The dispersing aid is at least one of ethanol, isopropyl alcohol, polyvinyl alcohol and polyethylene glycol.

[0037] The silane coupling agent is at least one of vinyltriethoxysilane, vinyltrimethoxysilane, and vinyltri(β-methoxyethoxy)silane.

[0038] The zinc metal organic framework is prepared by performing a solvothermal reaction of zinc nitrate and 1,3,5-tris(3-fluoro-4-formylphenyl)benzene in a solvent at a molar ratio of 12:2-3.

[0039] The present invention improves the high temperature resistance and corrosion resistance of the aluminum-based non-stick pan enamel coating, slows down the phenomenon of the enamel coating of the pan body falling off under the action of high temperature and acid-base solution, and at the same time makes it have the advantages of high hardness, good wear resistance and good thermal conductivity. Through the synergistic effect of the zinc metal organic framework and zinc powder, the zinc metal organic framework is used as a carrier to uniformly disperse the zinc powder in the bottom coating. The obtained bottom coating not only has good antibacterial properties, but also has strong bonding with the metal pan body and a dense coating. After high-temperature calcination, the high temperature resistance is even stronger. By introducing long-chain olefin-substituted cage-type polysilsesquioxane into the main structure, the expansion coefficient of the coating on the surface of the pan body is made closer to that of the metal pan body, thereby effectively improving the porcelain explosion phenomenon and increasing the service life of the ceramic non-stick pan. At the same time, the surface layer obtained by silane-modified silica sol has excellent wear resistance. At the same time, the coating prepared by the present invention also has excellent comprehensive properties such as anti-adhesion and high temperature resistance, which meets the requirements for long-term safe and healthy use of the non-stick pan coating.

[0040] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A composite coating for an aluminum alloy non-stick pan, comprising a coating body, characterized in that: The coating body comprises the following raw materials by weight: 5 to 10 parts of nano zinc powder, 10 to 18 parts of nano alumina powder, 3 to 6 parts of dispersing aid, 8.5 to 9 parts of titanium carbide, 2.5 to 5.5 parts of potassium feldspar, 1.5 to 3.5 parts of calcined kaolin powder, 0.2 to 0.7 parts of magnetite, 1.2 to 1.4 parts of zirconium oxide, 1 to 2 parts of borax, 1 to 2 parts of nano calcium carbonate, 1 to 2 parts of attapulgite powder, 4 to 5 parts of silicon micropowder, 15 to 30 parts of deionized water, 16 to 42 parts of zinc metal organic framework, 1.5 to 3.5 parts of silane coupling agent, 0.7 to 1.5 parts of additive and 1.6 to 2.5 parts of suspending agent.

2. The method for preparing a composite coating for an aluminum alloy non-stick pan according to claim 1, wherein: Including the following Steps: Step S1: Place the aluminum alloy pot body in a sandblasting machine, use silicon carbide ceramic as shot blasting, perform sandblasting roughening treatment, so that the inner surface of the pot body forms an uneven convex structure, and then degrease the pot body and clean it for use; Step S2: weighing 5 to 10 parts of nano zinc powder, 10 to 18 parts of nano alumina powder, 3 to 6 parts of dispersing aid, 8.5 to 9 parts of titanium carbide, 2.5 to 5.5 parts of potassium feldspar, 1.5 to 3.5 parts of calcined kaolin powder, 0.2 to 0.7 parts of magnetite, 1.2 to 1.4 parts of zirconium oxide, 1 to 2 parts of borax, 1 to 2 parts of nano calcium carbonate, 1 to 2 parts of attapulgite powder and 4 to 5 parts of silicon powder in parts by weight, and grinding in a high-speed ball mill. After grinding for 12 hours, sieving with a 300-500 mesh sieve, taking 20-30 parts of the sieve under the sieve and uniformly mixing with 15-30 parts of deionized water, then sequentially adding 16-42 parts of zinc metal organic framework and 1.5-3.5 parts of silane coupling agent, continuing to stir for 30-90 minutes, uniformly coating the inner surface of the metal pot in step S1, placing it in a muffle furnace and heating it to 300-500° C., and calcining it for 0.5-3 hours to obtain a non-stick pan bottom layer; Step S3: Weigh 8 to 12 parts by weight of silane-modified nano-silica sol; then add 0.7 to 1.5 parts of additives and 1.6 to 2.5 parts of suspending agent, stir and mix evenly, apply it on the non-stick pan bottom layer of step S2, and perform UV curing and oven drying in sequence to obtain the composite ceramic non-stick pan coating.

3. The method for preparing a composite coating for an aluminum alloy non-stick pan according to claim 2, wherein: The dispersing aid is at least one of ethanol, isopropyl alcohol, polyvinyl alcohol and polyethylene glycol.

4. The method for preparing a composite coating for an aluminum alloy non-stick pan according to claim 2, wherein: The silane coupling agent is at least one of vinyltriethoxysilane, vinyltrimethoxysilane and vinyltri(β-methoxyethoxy)silane.

5. The method for preparing a composite coating for an aluminum alloy non-stick pan according to claim 2, wherein: The zinc metal organic framework is prepared by performing a solvothermal reaction of zinc nitrate and 1,3,5-tris(3-fluoro-4-formylphenyl)benzene in a solvent at a molar ratio of 12:2-3.