CN116004116B - Modified ceramic coating, composite coating, preparation method of modified ceramic coating and cooker - Google Patents
Modified ceramic coating, composite coating, preparation method of modified ceramic coating and cooker Download PDFInfo
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- CN116004116B CN116004116B CN202211689849.5A CN202211689849A CN116004116B CN 116004116 B CN116004116 B CN 116004116B CN 202211689849 A CN202211689849 A CN 202211689849A CN 116004116 B CN116004116 B CN 116004116B
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- 238000005524 ceramic coating Methods 0.000 title claims abstract description 182
- 238000000576 coating method Methods 0.000 title claims abstract description 122
- 239000011248 coating agent Substances 0.000 title claims abstract description 115
- 239000002131 composite material Substances 0.000 title claims abstract description 74
- 238000002360 preparation method Methods 0.000 title abstract description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 223
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 107
- 239000000463 material Substances 0.000 claims abstract description 97
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 88
- 230000000051 modifying effect Effects 0.000 claims abstract description 7
- 239000010410 layer Substances 0.000 claims description 141
- 239000003973 paint Substances 0.000 claims description 61
- 239000000919 ceramic Substances 0.000 claims description 57
- -1 methyl siloxane Chemical class 0.000 claims description 37
- 238000005507 spraying Methods 0.000 claims description 28
- 229920000642 polymer Polymers 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 17
- 239000000758 substrate Substances 0.000 claims description 15
- 239000011247 coating layer Substances 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- 238000005245 sintering Methods 0.000 claims description 7
- 239000000178 monomer Substances 0.000 claims description 6
- 238000004220 aggregation Methods 0.000 claims description 5
- 230000002776 aggregation Effects 0.000 claims description 5
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 5
- 235000012239 silicon dioxide Nutrition 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 30
- 239000007822 coupling agent Substances 0.000 description 25
- 239000003921 oil Substances 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 14
- 230000004048 modification Effects 0.000 description 12
- 238000012986 modification Methods 0.000 description 12
- 238000003756 stirring Methods 0.000 description 11
- 239000000843 powder Substances 0.000 description 10
- 239000002987 primer (paints) Substances 0.000 description 10
- 239000002199 base oil Substances 0.000 description 8
- 239000011259 mixed solution Substances 0.000 description 8
- 239000003960 organic solvent Substances 0.000 description 8
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 229910052791 calcium Inorganic materials 0.000 description 6
- 239000011575 calcium Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000002045 lasting effect Effects 0.000 description 6
- 230000003746 surface roughness Effects 0.000 description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 5
- 239000012790 adhesive layer Substances 0.000 description 5
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 5
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 150000004645 aluminates Chemical class 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000004205 dimethyl polysiloxane Substances 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- AOWKSNWVBZGMTJ-UHFFFAOYSA-N calcium titanate Chemical compound [Ca+2].[O-][Ti]([O-])=O AOWKSNWVBZGMTJ-UHFFFAOYSA-N 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000006184 cosolvent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- HTDKEJXHILZNPP-UHFFFAOYSA-N dioctyl hydrogen phosphate Chemical compound CCCCCCCCOP(O)(=O)OCCCCCCCC HTDKEJXHILZNPP-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009775 high-speed stirring Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 229920001921 poly-methyl-phenyl-siloxane Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
Abstract
The application provides a modified ceramic coating and a preparation method thereof, a composite coating and a preparation method thereof and a cooker. According to the modified ceramic coating, the modified ceramic coating comprises a ceramic coating and hydrophobic calcium carbonate materials dispersed in the ceramic coating, wherein the mass fraction of the hydrophobic calcium carbonate materials in the modified ceramic coating is 5% -30%. According to the application, a permanently non-tacky coating can be formed by modifying the ceramic coating, so that a permanently non-tacky cookware is obtained.
Description
Technical Field
The application relates to the technical field of non-sticking of kitchen equipment, in particular to a modified ceramic coating and a preparation method thereof, a composite coating and a preparation method thereof, and a cooker.
Background
In the prior art, a coating layer with a non-stick effect is usually formed on the surface of a substrate by spraying ceramic materials. However, the non-stick life of a coating formed from a ceramic coating typically does not exceed 3 months, and it is difficult to meet the user's requirement for non-stick properties, thereby greatly reducing the use experience. The ceramic coating is easy to construct, and the manufacturing cost can be saved to a great extent. For this reason, the increase in the permanent non-tackiness of ceramic coatings would be a problem that requires continued attention in the field of pot manufacturing.
Disclosure of Invention
Therefore, the purpose of the application is to provide a modified ceramic coating and a preparation method thereof, a composite coating and a preparation method thereof and a cooker, so as to solve the problem that the coating formed by the ceramic coating in the prior art is durable and not good in adhesion performance.
According to a first aspect of the present application, there is provided a modified ceramic coating comprising a ceramic coating and a hydrophobic calcium carbonate material dispersed in the ceramic coating, the mass fraction of hydrophobic calcium carbonate material in the modified ceramic coating being from 5% to 30%.
In an embodiment, the hydrophobic calcium carbonate material has a particle size of 3 μm to 10 μm.
In an embodiment, the ceramic coating is a single-system ceramic coating or the ceramic coating is a topcoat of a dual-system ceramic coating.
According to a second aspect of the present application, there is provided a method of preparing a modified ceramic coating, the method of preparing a modified ceramic coating comprising the steps of: providing a hydrophobic calcium carbonate material and a cured ceramic coating; mixing the hydrophobic calcium carbonate material and the cured ceramic coating for a preset time to prepare the modified ceramic coating, wherein the mass fraction of the hydrophobic calcium carbonate material in the modified ceramic coating is 5% -30%.
In an embodiment, the step of providing the cured ceramic coating comprises: providing a first coating comprising a methyl siloxane-based monomer; providing a second coating, the second coating comprising silicic acid species; mixing the first coating and the second coating to form a mixture, and generating the coating comprising a predetermined amount of methyl siloxane polymer by sol-gel reaction of the mixture, thereby obtaining the cured ceramic coating.
According to a third aspect of the present application, there is provided a composite coating layer comprising a modified layer formed of a modified ceramic coating material, which is the modified ceramic coating material described in the above respective embodiments or a modified ceramic coating material produced by the method for producing a modified ceramic coating material described in the above respective embodiments.
In an embodiment, in the case where the ceramic coating is a single-system ceramic coating, the modified layer is formed on the substrate; in the case where the ceramic paint is a top oil of a dual-system ceramic paint, the modified layer is formed on a primer layer made of a primer of the dual-system ceramic paint.
In an embodiment, the modified layer comprises a first sub-layer with a concave-convex structure on the surface, the first sub-layer comprises a plurality of convex hulls formed by aggregation of hydrophobic calcium carbonate materials in the modified ceramic coating and a first non-adhesive layer at least distributed on the surfaces of the convex hulls, and at least part of the area of the first non-adhesive layer is positioned in the concave parts of the convex hulls.
In an embodiment, the modified layer further comprises a second sub-layer arranged outside the first sub-layer, the second sub-layer comprising a second non-adhesive layer and a hydrophobic calcium carbonate material filled in the second non-adhesive layer, wherein at least part of the area of the second sub-layer is located in the recesses of the relief structure of the first sub-layer.
In an embodiment, the thickness of the first sub-layer is 10 μm-20 μm, and the thickness of the first sub-layer is 1/3-2/5 of the total thickness of the modified layer.
In an embodiment, the peak-to-peak spacing between adjacent convex hulls of the relief structure is 5 μm to 15 μm and the height of the convex hulls is 5 μm to 15 μm.
According to a fourth aspect of the present application, there is provided a method of manufacturing a composite coating, the method of manufacturing a composite coating comprising the steps of: providing a modified ceramic coating; and spraying the modified ceramic paint to form the composite coating with a modified layer, wherein the modified ceramic paint is the modified ceramic paint described in each embodiment or the modified ceramic paint prepared by the method for preparing the modified ceramic paint described in each embodiment.
In an embodiment, in the case where the ceramic coating is a single-system ceramic coating, the modified layer is formed on the substrate; in the case where the ceramic paint is a top oil of a dual-system ceramic paint, the modified layer is formed on a primer layer made of a primer of the dual-system ceramic paint.
In an embodiment, the modified layer includes a first sub-layer having a concave-convex structure on a surface, and the step of spraying with the modified ceramic paint includes: and spraying a first preset thickness by adopting a modified ceramic coating, and drying the first preset thickness for a preset time through a preset temperature, thereby obtaining a first sub-layer with a concave-convex structure on the surface.
In an embodiment, the modified layer further comprises a second sub-layer disposed outside the first sub-layer, and the step of spraying with the modified ceramic paint further comprises: and spraying a second preset thickness on the first sub-layer by adopting the modified ceramic coating, and obtaining a modified layer comprising the first sub-layer and the second sub-layer through sintering treatment.
In an embodiment, the first preset thickness is 10 μm-20 μm, and the first preset thickness is 1/3-2/5 of the total thickness of the spray coating, and the total thickness of the spray coating is the sum of the first preset thickness and the second preset thickness.
According to a fifth aspect of the present application, there is provided a cooker comprising a cooker substrate, the cooker further comprising the composite coating according to the above-described respective embodiments formed on the cooker substrate or the composite coating produced according to the method of producing a composite coating according to the above-described respective embodiments formed on the cooker substrate.
Drawings
The foregoing and other objects and features of the application will become more apparent from the following description of the embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic structural view of a cooker provided according to an embodiment of the application;
FIG. 2 is a schematic structural view of a composite coating provided in accordance with an embodiment of the present application;
fig. 3 is a schematic structural view of another composite coating provided according to an embodiment of the present application.
Detailed Description
The present inventive concept will be described more fully hereinafter with reference to the exemplary embodiments, however, the present inventive concept may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art.
The conventional ceramic coating has a methylsiloxane polymer, but the methylsiloxane polymer in the coating is detached by abrasion, and after the methylis detached, the non-tackiness of the coating is drastically reduced. Therefore, in order to achieve the purpose of improving the non-tackiness, the methylsiloxane polymer can be protected by reinforcement, and deterioration of the non-tackiness due to breakage of the methylsiloxane polymer after long-term use can be avoided.
The calcium carbonate is used as a cheap and easily-obtained material and has certain hardness, wear resistance and self-porosity. However, the finer the particles of calcium carbonate, the higher the surface energy, which tends to aggregate by itself in a polar solvent, and thus cannot be uniformly dispersed in the coating material.
Therefore, in modifying ceramic coatings, it is necessary to consider not only whether the hardness and abrasion resistance of the material are suitable, but also how to better disperse it in the coating and so as not to affect the coating itself system.
By dispersing the hydrophobic calcium carbonate material in the ceramic coating in a predetermined amount, the hydrophobic calcium carbonate material can be uniformly dispersed in the ceramic coating, thereby enabling the formation of cookware having a coating with improved long-lasting non-tackiness properties.
The inventive concept of the present application will be described in detail below in connection with exemplary embodiments.
According to a first aspect of the present application there is provided a modified ceramic coating for use in cookware, wherein the modified ceramic coating is a liquid coating and may comprise a ceramic coating and a hydrophobic calcium carbonate material dispersed in the ceramic coating. Wherein the mass fraction of the hydrophobic calcium carbonate material in the modified ceramic coating is 5% -30%.
According to the present application, the surface affinity between the individual particles of the hydrophobic calcium carbonate material is poor, and thus, the individual particles of the hydrophobic calcium carbonate material are not easily agglomerated, and can be uniformly dispersed in the solvent of the ceramic coating. In an exemplary embodiment, the weight fraction of hydrophobic calcium carbonate material in the modified ceramic coating is 5% -30%, the hydrophobic calcium carbonate material being able to be uniformly dispersed in the coating system and not affecting the stability of the ceramic coating system (e.g., excessive addition results in larger voids between the formed coating and the hydrophobic calcium carbonate material particles). If the mass fraction of the hydrophobic calcium carbonate material in the modified ceramic coating is lower than 5%, the content of the hydrophobic calcium carbonate material in the modified ceramic coating is relatively small, and the lasting non-tackiness can be affected due to poor hardness of the formed composite coating. If the mass fraction of the hydrophobic calcium carbonate material in the modified ceramic coating is higher than 30%, the content of the hydrophobic calcium carbonate material in the modified ceramic coating is relatively large, and the bonding performance between the particles of the hydrophobic calcium carbonate material and the non-adhesive layer in the formed coating is poor, so that the formed composite coating has more pores, the wear resistance and strength of the composite coating are reduced, and the lasting non-adhesive property is affected. According to the inventive concept, the mass fraction of hydrophobic calcium carbonate material in the modified ceramic coating has a parabolic relationship with the permanent non-tackiness within the mass fraction range defined above. Thus, according to exemplary embodiments of the present application, the mass fraction of hydrophobic calcium carbonate material in the modified ceramic coating may be 5% -10%, 8% -12%, 10% -15%, 15% -20%, 20% -25%, 25% -30%, 12% -25% or 15% -25%, preferably 12% -25%, more preferably 15% -20%.
According to the present application, calcium carbonate may be modified by a phosphate active agent, an aluminate coupling agent, or a titanate coupling agent, and since the phosphate active agent, the aluminate coupling agent, and the titanate coupling agent are all macromolecular modifiers, a hydrophobic calcium carbonate material including calcium carbonate and a hydrophobic substance coated on the surface of calcium carbonate can be obtained. Wherein, the calcium carbonate can be calcium carbonate with different purities, in particular, the purity is more than 92 percent. The higher the purity of the calcium carbonate is, the better the modifying effect is, the hydrophobicity is conveniently improved to form a coating with improved lasting non-tackiness, and the higher the whiteness is, the better the quality of the formed coating is. In an exemplary embodiment, the hydrophobic substance may be a calcium ester, in particular, a calcium phosphate, a calcium aluminate, a calcium titanate. In addition, the hydrophobic substance has better heat resistance, and can stably exist in the composite coating below 350 ℃, so that the composite coating cannot lose efficacy due to non-tackiness caused by long-term heating, and therefore, the modified ceramic coating can be permanently non-tacky and has longer non-tackiness life. In addition, the hydrophobic calcium carbonate material has excellent hydrophobic performance, and can weaken the infiltration degree of the composite coating by corrosive media, so that the corrosion resistance of the composite coating can be enhanced.
In an exemplary embodiment, the modification of calcium carbonate by the titanate coupling agent may be prepared by the following steps S101 to S104.
Step S101, mixing a titanate coupling agent and an organic solvent according to a predetermined mass ratio to obtain a mixed solution.
In embodiments herein, the titanate coupling agent may include at least one of isostearyl titanate, dodecylbenzenesulfonyl titanate, dioctyl phosphate titanate, isopropyl tri-titanate, dioctyl diphosphate titanium oxide, bis-ethylene titanate, and tetra-octyloxy dititanate. The organic solvent comprises at least one of white oil, petroleum ether, methanol, ethanol and isopropanol. The titanate coupling agent and the organic solvent form a mixed solution within a proper mass ratio range, the titanate coupling agent in the mixed solution can better coat the calcium carbonate, and the titanate coupling agent in the mixed solution with proper concentration can react with the calcium carbonate within a short time, so that the time for modifying the calcium carbonate can be shortened. In an exemplary embodiment, the mass ratio of titanate coupling agent to organic solvent is in the range of 1/2 to 1. When the mass ratio of the titanate coupling agent to the organic solvent is less than 1/2, the organic solvent accounts for more weight, namely the concentration of the mixed solution is smaller, which can lead to longer modification time, thereby prolonging the preparation time; when the mass ratio of the titanate coupling agent to the organic solvent is greater than 1, the titanate coupling agent accounts for a relatively large amount, namely the concentration of the mixed solution is too high, and the incomplete modification of the titanate can be caused by incomplete contact with the surface of the calcium carbonate.
Step S102, drying the calcium carbonate powder with the predetermined particle size for a preset time under a certain temperature condition.
In the embodiment of the application, before the calcium carbonate is modified, the moisture in the calcium carbonate powder can be removed as much as possible by drying, so that the modifying effect is ensured. In an exemplary embodiment, the 0.5 μm to 10 μm calcium carbonate powder may be dried at 80℃to 120℃for 0.5h to 2h.
And step S103, adding the dried calcium carbonate powder into the mixed solution, and uniformly stirring to form a suspension. Wherein the weight ratio of the calcium carbonate powder to the titanate coupling agent is 400:1-100:1.
In an exemplary embodiment, after the dried calcium carbonate powder is poured into the above mixed solution at a certain weight ratio, high-speed stirring is performed by using a stirrer with a speed of more than 3000r/min to 6000r/min for 0.5h to 2h.
Step S104, drying the suspension under the condition of a preset temperature, thereby obtaining the carbonate modified calcium carbonate.
In an exemplary embodiment, the predetermined temperature condition is 200-210 ℃. In the temperature range, the titanate coupling agent reacts with calcium ions hydrolyzed from the surface of the calcium carbonate to generate titanate calcium, and the titanate coupling agent is attached to the surface of the calcium carbonate, so that the property of the calcium carbonate is changed, and the titanate modified calcium carbonate is generated. In the embodiment of the application, if the drying temperature is lower than 200 ℃, the volatilization of the organic solvent in the suspension is slower due to the too low temperature, and the surface of the calcium carbonate powder is not completely wrapped, so that the modification effect is poor; if the temperature is higher than 210 ℃, the speed of forming the titanate calcium on the surface of the calcium carbonate by the titanate coupling agent is too high due to the fact that the temperature is too high, so that the titanate calcium cannot be uniformly distributed on the surface of the calcium carbonate, uneven thickness of the titanate calcium is caused or the surface of the calcium carbonate is incompletely wrapped by the titanate calcium, and the modification effect is poor.
In order to ensure that the resulting composite coating has abrasion resistance and hardness, it is also necessary to control the particle size of the hydrophobic calcium carbonate material. According to the present application, the hydrophobic calcium carbonate material may be in powder form with a particle size on the order of microns. In an exemplary embodiment, the particle size of the hydrophobic calcium carbonate material may be 3 μm to 10 μm. When the particle diameter of the hydrophobic calcium carbonate material is less than 3 μm, the powder particle diameter is too small, which may not only result in poor dispersibility of the hydrophobic calcium carbonate material in the modified ceramic coating material, but also result in failure to form a concave-convex structure to be described later; when the particle size of the hydrophobic calcium carbonate material is larger than 10 mu m, the particle size of the powder is too large, so that the roughness of the concave-convex structure is larger, and the abrasion resistance of the composite coating layer is not up to the standard.
The ceramic coating may comprise a single system ceramic coating or a dual system ceramic coating. The single-system ceramic paint is a single paint, and the double-system ceramic paint is formed by combining base oil and surface oil which are used independently of each other. According to the application, the single-system ceramic paint can be modified, and the surface oil of the double-system ceramic paint can also be modified. For example, hydrophobic calcium carbonate materials may be added to the topcoat oil of a two-system ceramic coating to promote durable non-tackiness.
According to a second aspect of the present application, there is provided a method of preparing a modified ceramic coating, the method of preparing a modified ceramic coating comprising the following steps.
Step S201 provides a hydrophobic calcium carbonate material and a cured ceramic coating.
Step S202, mixing the hydrophobic calcium carbonate material and the cured ceramic coating for a preset time to prepare the modified ceramic coating, wherein the mass fraction of the hydrophobic calcium carbonate material in the modified ceramic coating is 5% -30%.
In an embodiment, the hydrophobic calcium carbonate material and the cured ceramic coating are mixed under high speed agitation for a predetermined time. In an exemplary embodiment, the predetermined time of mixing may be 0.5h-2h and the speed of stirring may be 500r/min-1000r/min, thereby uniformly distributing the hydrophobic calcium carbonate material in the cured ceramic coating. If the stirring and mixing time is less than 0.5h, uniformity may not be ensured, and if the stirring and mixing time is more than 2h, the production efficiency may be affected too long.
The single-system ceramic coating is a single coating, and at least one layer of coating can be formed by the single-system ceramic coating. The ceramic coating of the dual system is formed by combining a base oil and a face oil which are used independently of each other. At least two layers of coating can be formed by a two-system ceramic coating. In ceramic coatings (e.g., single coatings, top or bottom oils), including multiple coatings that are mixed prior to use, the ceramic coating remains stable for a short period of time after the multiple coatings are mixed, thus ensuring that the ceramic coating's own system is not affected when manufacturing the modified ceramic coating. In embodiments of the present application, the ceramic coating may include a single-system ceramic coating or a two-system ceramic coating finish. The cured ceramic coating refers to a ceramic coating obtained by curing a plurality of coatings of the ceramic coating for a preset time after being fully mixed. After curing of the ceramic coating, a coating system is formed which is stable in system and contains a preset amount of methyl siloxane polymer, so that the addition of the hydrophobic calcium carbonate material after curing of the ceramic coating can not only ensure that the formed modified ceramic coating system is not destroyed, but also meet the requirement of dispersibility, thereby being capable of facilitating the formation of a desired composite coating as required. After the modified ceramic paint is formed, the modified ceramic paint can be stored in a sealed state for standby or immediate use, thereby ensuring the effectiveness of the modified ceramic paint.
According to the method for preparing the modified ceramic coating material, the hydrophobic calcium carbonate material has hydrophobic property and can be uniformly dispersed in the ceramic coating material, but due to the high activity of the surface hydrophobic substance of the hydrophobic calcium carbonate material, the hydrophobic calcium carbonate material can possibly react with a plurality of coatings forming the ceramic coating material (for example, the hydrophobic substance can possibly react with-OH formed by hydrolysis of methyltriethoxysilane), so that the quality and the quantity of the formed methyl siloxane polymer are affected.
In an embodiment, the step of preparing the cured ceramic coating comprises: step S301, providing a first coating, wherein the first coating comprises methyl siloxane monomers; step S302, providing a second coating, wherein the second coating comprises silicic acid substances; wherein the first coating and the second coating are mixed to form a mixture, and the mixture is subjected to sol-gel reaction to form a coating comprising a predetermined amount of methyl siloxane polymer, thereby obtaining the cured ceramic coating. In embodiments of the present application, the second coating may include a filler, such as titanium dioxide, in addition to the silicic acid species, to provide abrasion resistance, etc. to the final coating. The second coating may also include a catalyst that catalyzes the curing of the ceramic coating.
In an embodiment, the methylsiloxane-based polymer may be at least one of polymethylsiloxane, polydimethylsiloxane, polymethylphenylsiloxane, and polydiphenylsiloxane. According to the present application, the hydrophobic calcium carbonate material is added after a predetermined amount of the methylsiloxane-based polymer is formed, so that it is possible to ensure that the stability of the ceramic coating itself system is not affected by the addition of the hydrophobic calcium carbonate material. In an exemplary embodiment, the mass fraction of the methylsiloxane polymer in the modified ceramic coating is 20% -30%.
In an exemplary embodiment, the methylsiloxane monomer may be Methyltriethoxysilane (MTES), the silicic acid substance may be tetraethyl orthosilicate (TEOS), and the hydrophobic group-CH on the surface is prepared by controlling the process according to different hydrolysis speeds of Methyltriethoxysilane (MTES) and tetraethyl orthosilicate (TEOS) in the two coatings 3 And hydrophilic group-OH-SiO 2 Sol of SiO 2 During the ageing process of sol, nano SiO 2 Self-assembling clusters form ceramic coatings comprising polydimethylsiloxane. If a hydrophobic calcium carbonate material is added to one of the plurality of ceramic-forming coatings or to an incompletely cured ceramic coating, the ceramic coating may be affected by reaction with the ceramic-forming coatingThe formation of methylsiloxane polymers which act primarily as non-sticking agents. Therefore, according to the present application, the addition of the hydrophobic calcium carbonate material after complete curing can not only ensure that the system of the formed modified ceramic coating is not destroyed, but also satisfy the requirement of dispersibility, thereby being capable of facilitating the formation of a desired composite coating layer as required. In addition, compared with the existing mode that a dispersing agent (such as a solvent) is additionally added to ensure the dispersibility, the method not only can ensure the stability and the dispersibility of a coating system, but also can shorten the steps of a preparation process.
In an embodiment, 5g to 20g of the hydrophobic calcium carbonate material may be dispersed into 85g to 95g of the cured ceramic paint (surface oil of the monomer-based ceramic paint or the dual-system ceramic paint) to form a mixed paint with a total weight of 100g, and the mixed paint is stirred to form a modified ceramic paint, wherein the stirring time is 0.5h to 2h, and the stirring speed is 500r/min to 1000r/min, so that the modified ceramic paint with a mass fraction of the hydrophobic calcium carbonate material of 5% -30% is formed.
According to a third aspect of the present application, there is provided a composite coating, wherein the composite coating comprises a modified layer formed from a modified ceramic coating, the modified ceramic coating comprising a ceramic coating and a hydrophobic calcium carbonate material dispersed in the ceramic coating, the mass fraction of hydrophobic calcium carbonate material in the modified ceramic coating being from 5% to 30%.
In an embodiment, the modified layer comprises a first sub-layer having a relief structure, wherein the first sub-layer comprises a plurality of convex hulls formed by aggregation of hydrophobic calcium carbonate material in the modified ceramic coating and a first non-stick layer distributed at least over the surfaces of the plurality of convex hulls, wherein the first non-stick layer comprises a methylsiloxane-based polymer formed by ceramic coating in the modified ceramic coating, and at least a partial region of the first non-stick layer is located in a recess of the plurality of convex hulls.
In an embodiment, the weight of hydrophobic calcium carbonate material in the modified layer is 10% -50% of the total weight of the modified layer.
Fig. 1 is a schematic structural view of a cooker provided according to an embodiment of the present application. Fig. 2 shows a structural example of a composite coating according to the present application. As shown in fig. 1 and 2, the cooker includes a cooker base 20 and a composite coating 10 formed on an inner surface of the cooker base 20. Wherein the composite coating 10 may include a first sub-layer including a plurality of convex hulls formed from an aggregation of hydrophobic calcium carbonate material and a first non-stick layer distributed at least over a surface of the plurality of convex hulls.
According to the composite coating provided by the embodiment of the application, as the first non-stick layer comprises the methyl siloxane polymer formed by the ceramic coating in the modified ceramic coating, certain non-stick property can be exerted, and the concave-convex structure serving as the reinforcing structure can effectively protect the methyl siloxane polymer of the first non-stick layer, so that the composite coating is durable and non-stick.
To further promote non-tackiness, in an embodiment, the modifying layer further comprises a second sub-layer disposed outside the first sub-layer, the second sub-layer comprising a second non-stick layer and a hydrophobic calcium carbonate material filled in the second non-stick layer, wherein the second non-stick layer comprises a methylsiloxane-based polymer formed from a ceramic coating of the modified ceramic coating, and at least a partial region of the second sub-layer is located in the recesses of the relief structure of the first sub-layer.
Fig. 1 is a schematic structural view of a cooker provided according to an embodiment of the present application. Fig. 3 shows a structural example of another composite coating according to the present application. As shown in fig. 1 and 3, the cooker includes a cooker base 20 and a composite coating 10 formed on an inner surface of the cooker base 20. Wherein the composite coating 10 may include a first sub-layer 11 and a second sub-layer 12 disposed outside the first sub-layer 11, the first sub-layer 11 including a plurality of convex hulls 111 formed by aggregation of hydrophobic calcium carbonate material and a first non-stick layer 112 distributed at least on a surface of the plurality of convex hulls 111. The second sub-layer 12 includes a second non-stick layer and a hydrophobic calcium carbonate material dispersed in the second non-stick layer.
In an embodiment, the thickness of the first sub-layer is 10 μm-20 μm and the thickness of the first sub-layer is 1/3-2/5 of the total thickness of the composite coating. Wherein the total thickness of the composite coating is 25-60 mu m.
In an embodiment, the relief structure is made up of a number of convex hulls, 3-8 per square centimeter of area. Wherein, the peak interval between adjacent convex hulls of the convex hulls is 5 μm-15 μm, and the height of the convex hulls is 5 μm-15 μm. Therefore, the second sub-layer located above the concave-convex structure also has a surface roughness structure adapted to the concave-convex structure, when the peak pitch between adjacent convex hulls is smaller than 5 μm, the peak pitch is too small, indicating that the depressions (i.e., the valley positions) of the surface roughness structure are narrower, and therefore, when the methyl groups at the peaks are worn out, the methyl groups of the methylsiloxane-based polymer of the second sub-layer located at the depressions cannot be sufficiently exposed, thereby affecting the non-tackiness thereof and thus the permanent non-tackiness performance. When the peak pitch between adjacent convex hulls is greater than 15 μm, the peak pitch is too large, indicating that the concave positions of the surface roughness structure are easily touched, so that methyl groups at the concave positions (i.e., the valley positions) are easily worn, resulting in a shorter non-sticking lifetime. When the height of the convex hull is less than 5 μm, the convex hull is too low to form an effective recess to form a protection area; when the height of the convex hull is more than 15 μm, the coating wear resistance may be deteriorated due to insufficient strength of the convex hull, thereby affecting the durability of non-tackiness.
According to a fourth aspect of the present application, there is provided a method of manufacturing a composite coating, wherein the method of manufacturing a composite coating comprises: step S201, providing a modified ceramic coating; and step S202, spraying the modified ceramic paint, so as to form the composite coating with the modified layer.
According to the method for manufacturing the composite coating provided by the embodiment of the application, the modified ceramic coating comprises a ceramic coating and hydrophobic calcium carbonate materials dispersed in the ceramic coating, wherein the mass fraction of the hydrophobic calcium carbonate materials in the modified ceramic coating is 5% -30%. When the mass fraction of the hydrophobic calcium carbonate material in the modified ceramic coating is less than 5%, the surface roughness of the formed composite coating is smaller, so that the durable non-sticky lifting effect is not obvious. When the mass fraction of the hydrophobic calcium carbonate material in the modified ceramic coating is more than 30%, the surface roughness of the formed composite coating is easy to be overlarge, and the problem of poor wear resistance is easy to occur, so that the lasting non-stick performance is influenced. According to the application, after the methyl groups of the protruding parts are worn, not only the methyl groups at the wave troughs provide non-tackiness, but also the modified calcium carbonate exposed at the wave troughs has hydrophobicity and can provide a certain non-tackiness function, so that the durable non-tackiness of the application is better.
According to the present application, when the ceramic coating is a monolithic ceramic coating, the modified ceramic coating is a single coating, and the modified layer is formed on the substrate. In the case where the ceramic coating is a top oil of a dual-system ceramic coating, the modified layer is formed on a primer layer made of a primer of the dual-system ceramic coating. According to the present application, it is possible to sand blast on the substrate before forming the composite coating layer, thereby obtaining a substrate having a surface roughness Ra of 3 μm to 6 μm. By presetting the roughness on the substrate in advance, the roughness of the roughness structure of the surface of the composite coating can be more obvious. The substrate may be a cookware body or a primer coating.
According to the application, the micron-sized hydrophobic calcium carbonate material can be uniformly dispersed in the modified ceramic coating, and a modified layer with a concave-convex structure of a plurality of convex hulls can be obtained under the condition of spraying preset thickness and temperature interference, so that the concave part of the concave-convex structure can form more effective protection on the methyl siloxane polymer formed by the ceramic coating. In addition, the hydrophobic calcium carbonate material has certain hydrophobicity and can provide certain non-sticking function. In addition, the modified layer with uniformly dispersed hydrophobic calcium carbonate material can be formed under the condition that temperature interference does not exist, so that the lasting non-sticking performance is further improved.
The preparation method of the modified layer will be described below with reference to specific examples.
In an embodiment, the modified layer includes a first sub-layer having a concave-convex structure on a surface, and the step of spraying the modified ceramic coating includes spraying a first preset thickness with the modified ceramic coating, and drying for a preset time at a predetermined temperature to obtain the first sub-layer having the concave-convex structure on the surface. When the modified layer is formed, the thickness of spraying, the surface drying temperature and the time are required to be controlled, so that the modified layer not only has a proper concave-convex structure, but also can ensure the quality of the modified layer. In an exemplary embodiment, the first predetermined thickness is 10 μm to 20 μm, the predetermined temperature is 80℃to 120℃and the predetermined time is 3min to 5min. When the temperature is lower than 80 ℃ or the time is lower than 3min, the volatilization speed of the cosolvent in the coating is slower, a preset concave-convex structure is not easy to form easily, and when the temperature is higher than 120 ℃ or the time is higher than 5min, the finally formed modified layer is easy to cause coating defects such as cracking and the like.
In these examples, when reacted at a predetermined temperature of 80-120 ℃ for a predetermined time of 3-5 min, the hydrophobic calcium carbonate with poor surface affinity may better "flow" in the coating, and the larger particles of hydrophobic calcium carbonate and hydrophobic calcium carbonate flow and aggregate (accumulate) together, thereby forming a concave-convex structure with a plurality of convex hulls, and thus being capable of forming effective protection for the methylsiloxane-based polymer of the first non-stick layer to extend the durable non-stick performance of the composite coating. In addition, if the roughness is formed on the pot by processing (for example, forming the roughness by spinning or pressing), not only the preset roughness cannot be formed, but also the manufacturing period of the pot may be prolonged, and the manufacturing cost may be increased.
In order to further improve the non-tackiness, the modified layer further comprises a second sub-layer arranged outside the first sub-layer, and the step of spraying the modified ceramic coating is adopted, specifically, the modified ceramic coating is adopted to spray a second preset thickness on the first sub-layer, so that the second sub-layer is obtained. In an exemplary embodiment, the second preset thickness is 25 μm-40 μm and the first preset thickness is 1/3-2/5 of the total thickness of the spray coating, wherein the total thickness of the spray coating is the sum of the first preset thickness and the second preset thickness. Specifically, in the case where the ceramic coating material is a monolithic ceramic coating material, the modification herein refers to modification of the monolithic ceramic coating material, that is, the modified ceramic coating material referred to in this example is a monolithic ceramic coating material after modification. In the case where the ceramic coating is a two-system ceramic coating, the modification referred to herein refers to modification of the topcoat oil of the two-system ceramic coating, i.e., the modified ceramic coating is a modified topcoat oil. In this case, the composite coating further comprises a primer layer disposed at the bottom of the modified layer, the primer layer being prepared from a primer of a dual-system ceramic coating.
In these embodiments, if the second sub-layer is within the preset thickness range, a part of the area of the second sub-layer is protected at the concave portion of the concave-convex structure of the first sub-layer, so as to form the composite coating with concave-convex surface layer, and the second sub-layer at the concave portion can be continuously protected, so that the second sub-layer can be further lifted.
In an embodiment, the first preset thickness is 10 μm-20 μm, the second preset thickness is 25 μm-40 μm, and the first preset thickness is 1/3-2/5 of the total thickness of the spray coating. It should be noted that, due to the presence of the concave-convex structure, the thicknesses of the first sub-layer and the second sub-layer which are finally formed are not greatly different from the corresponding spraying thicknesses.
According to a fifth aspect of the present application, there is provided a cooker, wherein the cooker comprises a cooker substrate and the composite coating provided by the above respective embodiments formed on the cooker substrate and the composite coating produced by the method of producing the composite coating.
As shown in fig. 1, the cooker includes a cooker base 20 and a composite coating 10 formed on a surface of the cooker base 20. The composite coating may be the composite coating 10 mentioned in the above embodiments, and thus has all the advantages of the composite coating described above, and will not be described in detail herein.
The present application will be described in detail with reference to examples, but the scope of protection of the present application is not limited to the examples.
Example 1 (monolithic ceramic coating)
Step S11, preparing a cooker body.
Step S12, preparing a single-system ceramic paint. Specifically, 15g of the titanate coupling agent modified calcium carbonate was dispersed in 85g of the cured monomer-based ceramic coating, and the mixture was stirred to form a modified ceramic coating. Wherein the stirring time is 1h, and the stirring speed is 800r/min.
And S13, forming the thickness of 20 mu m on the cooker body by adopting the modified ceramic coating through air spraying, and placing the cooker body in an environment of 80 ℃ after spraying, and drying for 3 minutes, thereby obtaining the first sub-layer.
And S14, spraying a modified ceramic coating on the first sub-layer to a thickness of 20 mu m, placing the pot body in a sintering furnace, and sintering at a temperature of 100 ℃ for 4min, thereby forming the pot with the composite coating of the first sub-layer and the second sub-layer.
Example 2 (Dual System ceramic coating)
The pot according to example 2 was manufactured by the following method.
Step S21, preparing a cooker body.
Step S22, providing base oil.
In step S23, a modified surface oil is prepared, specifically, 15g of a titanate coupling agent modified calcium carbonate is dispersed into 85g of the cured surface oil, and the modified surface oil is formed by stirring. Wherein the stirring time is 1h, and the stirring speed is 800r/min.
Step S24, forming a base oil layer with a thickness of 20 μm by using the base oil of the present embodiment.
Step S25, after the surface of the bottom oil layer is dried, a modified layer with the thickness of 20 mu m is formed on the bottom oil layer by adopting modified surface oil, after spraying, the pot body is placed in an environment of 80 ℃ for 3 minutes, and then the pot body is placed in a sintering furnace and is placed in the temperature of 100 ℃ for sintering for 4 minutes, so that the pot with the composite coating of the embodiment 2 is formed.
Example 3
The pot of example 3 was manufactured by the same method as example 1, except that step S14 was not included, and the pot body after the surface drying obtained in step S13 was placed in a sintering furnace and sintered at a temperature of 100 ℃ for 4 minutes.
Example 4
A pot of example 4 was manufactured in the same manner as in example 1, except that a modified ceramic paint having a mass fraction of titanate coupling agent modified calcium carbonate of 5% was formed.
Example 5
A pot of example 5 was manufactured in the same manner as in example 1, except that a modified ceramic paint having a mass fraction of the titanate coupling agent modified calcium carbonate of 30% was formed.
Example 6
A pot of example 6 was produced in the same manner as in example 1, except that a modified ceramic paint having 15% by mass of the aluminate coupling agent modified calcium carbonate was formed.
Example 7
A pot of example 7 was produced in the same manner as in example 1, except that a modified ceramic paint having a mass fraction of 15% of phosphate activator-modified calcium carbonate was formed.
Example 8
A pan of example 8 was manufactured in the same manner as in example 1, except that in step S11, the inner surface of the pan body was sandblasted so that the roughness Ra of the inner surface of the pan body was 3 to 6 μm.
Comparative example 1
A pot of comparative example 1 was manufactured in the same manner as in example 1, except that a modified ceramic paint in which the mass fraction of the titanate coupling agent modified calcium carbonate was 4% was formed.
Comparative example 2
A pot of comparative example 2 was manufactured in the same manner as in example 1, except that a modified ceramic paint in which the mass fraction of the titanate coupling agent modified calcium carbonate was 31% was formed.
Comparative example 3
The pot of comparative example 3 was manufactured by using the monolithic ceramic coating to obtain a coating layer having a thickness of 40. Mu.m.
Comparative example 4
The pot of comparative example 4 was manufactured by forming a base oil layer having a thickness of 20 μm using base oil, and forming a surface oil layer having a thickness of 20 μm using surface oil on the base oil layer.
Performance index test:the pot obtained above was subjected to performance test, the specific performance test method is as follows, and the results are recorded in table 1 below.
(1) Persistent tack-free test method: the 5.6.9 permanent non-stick test method in GB/T32388-2015 is in times, the higher the times are, the longer the service life is, the non-stick result is evaluated 1000 times, and the times when the test method is used to III grade are recorded.
Table 1 performance test data for the examples and comparative examples of the present application
| Sequence number | Durable non-stick (secondary) |
| Example 1 | 10000 |
| Example 2 | 8000 |
| Example 3 | 6000 |
| Example 4 | 5000 |
| Example 5 | 5000 |
| Example 6 | 10000 |
| Example 7 | 10000 |
| Example 8 | 11000 |
| Comparative example 1 | 4000 |
| Comparative example 2 | 4000 |
| Comparative example 3 | 1000 |
| Comparative example 4 | 1000 |
As can be seen from table 1, the conventional ceramic coatings of comparative examples 3 to 4 cannot meet the national standard requirements (not less than 5000 times) in terms of durable non-stick effect, however, according to the present application, the hydrophobic calcium carbonate material is added to the ceramic coating to form a modified ceramic coating, and the coating formed by the modified ceramic coating has better durable non-stick property, and can meet the national standard requirements. In addition, the composite coating can also have the advantage of being more corrosion resistant due to the hydrophobicity of the hydrophobic calcium carbonate material in the coating.
According to the application, after the methyl groups of the protruding parts are worn, not only the methyl groups at the wave troughs provide non-tackiness, but also the modified calcium carbonate exposed from the wave troughs has hydrophobicity and can provide a certain non-tackiness function, so that the lasting non-tackiness of the coating formed by the modified ceramic coating according to the application is better.
Although embodiments of the present application have been described in detail hereinabove, various modifications and variations may be made to the embodiments of the present application by those skilled in the art without departing from the spirit and scope of the present application. It will be appreciated that such modifications and variations will still fall within the spirit and scope of the embodiments of the present application as defined by the appended claims, as will occur to those skilled in the art.
Claims (15)
1. The modified ceramic paint is characterized by comprising a cured ceramic paint and hydrophobic calcium carbonate materials uniformly dispersed in the cured ceramic paint, wherein the cured ceramic paint is paint comprising methyl siloxane polymers, the mass fraction of the hydrophobic calcium carbonate materials in the modified ceramic paint is 5% -30%, and the hydrophobic calcium carbonate materials have particle sizes of 3-10 mu m, wherein the ceramic paint is a single-system ceramic paint or the ceramic paint is surface oil of a double-system ceramic paint.
2. A method of preparing a modified ceramic coating, the method comprising the steps of:
providing a hydrophobic calcium carbonate material and a cured ceramic coating;
mixing the hydrophobic calcium carbonate material and the cured ceramic paint for a preset time to prepare a modified ceramic paint in which the hydrophobic calcium carbonate material is uniformly dispersed in the cured ceramic paint, wherein the mass fraction of the hydrophobic calcium carbonate material in the modified ceramic paint is 5% -30%, the hydrophobic calcium carbonate material has a particle size of 3-10 mu m, and the ceramic paint is a single-system ceramic paint or the ceramic paint is surface oil of a double-system ceramic paint.
3. The method of preparing a modified ceramic coating according to claim 2, wherein the step of providing the cured ceramic coating comprises:
providing a first coating comprising a methyl siloxane-based monomer;
providing a second coating, the second coating comprising silicic acid species;
mixing the first coating and the second coating to form a mixture, and generating the coating comprising a predetermined amount of methyl siloxane polymer by sol-gel reaction of the mixture, thereby obtaining the cured ceramic coating.
4. A composite coating layer, characterized in that the composite coating layer comprises a modified layer formed from a modified ceramic coating material, which is the modified ceramic coating material according to claim 1 or a modified ceramic coating material produced by the method for producing a modified ceramic coating material according to claim 2 or 3.
5. The composite coating according to claim 4, wherein the modified layer is formed on a substrate in the case where the ceramic coating is a single-system ceramic coating; in the case where the ceramic paint is a top oil of a dual-system ceramic paint, the modified layer is formed on a primer layer made of a primer of the dual-system ceramic paint.
6. The composite coating of claim 4, wherein the modified layer comprises a first sub-layer having a surface with a relief structure, the first sub-layer comprising a plurality of convex hulls formed by aggregation of hydrophobic calcium carbonate material in a modified ceramic coating and a first non-stick layer distributed at least over the surfaces of the plurality of convex hulls, at least a portion of the first non-stick layer being located in a depression of the plurality of convex hulls.
7. The composite coating of claim 6, wherein the modifying layer further comprises a second sub-layer disposed outside the first sub-layer, the second sub-layer comprising a second non-stick layer and a hydrophobic calcium carbonate material filled in the second non-stick layer, wherein at least a portion of the area of the second sub-layer is located in depressions of the relief structure of the first sub-layer.
8. The composite coating of claim 7, wherein the first sub-layer has a thickness of 10 μιη to 20 μιη and the first sub-layer has a thickness of 1/3 to 2/5 of the total thickness of the modified layer.
9. The composite coating of claim 6, wherein the peak-to-peak spacing between adjacent convex hulls of the relief structure is 5 μιη to 15 μιη and the height of the convex hulls is 5 μιη to 15 μιη.
10. A method of making a composite coating, the method comprising the steps of:
providing a modified ceramic coating;
spraying with the modified ceramic paint to form the composite coating with a modified layer,
wherein the modified ceramic coating is the modified ceramic coating according to claim 1 or the modified ceramic coating produced by the method for producing a modified ceramic coating according to claim 2 or 3.
11. The method of manufacturing a composite coating according to claim 10, wherein the modified layer is formed on a substrate in the case where the ceramic coating is a single-system ceramic coating; in the case where the ceramic paint is a top oil of a dual-system ceramic paint, the modified layer is formed on a primer layer made of a primer of the dual-system ceramic paint.
12. The method of manufacturing a composite coating according to claim 10, wherein the modified layer comprises a first sub-layer having a concave-convex structure on a surface, and the step of spraying with the modified ceramic coating comprises:
and spraying a first preset thickness by adopting a modified ceramic coating, and drying the first preset thickness for a preset time through a preset temperature, thereby obtaining a first sub-layer with a concave-convex structure on the surface.
13. The method of manufacturing a composite coating according to claim 12, wherein the modified layer further comprises a second sub-layer disposed outside the first sub-layer, the step of spraying with the modified ceramic coating further comprising:
and spraying a second preset thickness on the first sub-layer by adopting the modified ceramic coating, and obtaining a modified layer comprising the first sub-layer and the second sub-layer through sintering treatment.
14. The method of manufacturing a composite coating according to claim 13, wherein the first preset thickness is 10 μm to 20 μm and the first preset thickness is 1/3 to 2/5 of a total thickness of the spray coating, which total thickness is a sum of the first preset thickness and the second preset thickness.
15. A cooker, characterized in that it comprises a cooker base, and further comprises a composite coating layer according to any one of claims 4 to 9 formed on the cooker base or a composite coating layer produced by the method for producing a composite coating layer according to any one of claims 10 to 14 formed on the cooker base.
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