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CN-121991536-A - Ceramic coating special for high-binding force etching pot and layered coating method thereof

CN121991536ACN 121991536 ACN121991536 ACN 121991536ACN-121991536-A

Abstract

The invention discloses a special ceramic coating for a high-binding force etching pot and a layered coating method thereof, and particularly relates to the fields of chemical industry and material synthesis. The coating consists of a bottom layer and a surface layer, wherein the bottom layer is crosslinked with an organosilicon-polyimide segmented copolymer, nano polyurethane microspheres and superfine silicon carbide powder through a modified silane compound to form a three-dimensional network, and carboxyl at the tail end of the bottom layer is used for forming strong chemical bonding with a metal substrate. The surface layer comprises a three-dimensional heat conduction network constructed by a nanometer boron nitride sheet layer and a silicon nanometer whisker, and is embedded with a ceramic base material, nanometer silver, pH response modified hydroxyapatite and a SiO 2 coating layer. The coating method comprises the steps of substrate etching, respectively preparing a bottom layer and a surface layer coating, layering spraying and gradient curing. The invention realizes high binding force between the coating and the base material and excellent heat conductivity, and remarkably improves the durability and reliability of the etching pot under rapid temperature difference change.

Inventors

  • CUI XUEJING
  • CHEN PENG
  • Xie Biaoxuan

Assignees

  • 上海鸣家新材料科技有限公司

Dates

Publication Date
20260508
Application Date
20260129

Claims (10)

  1. 1. The special ceramic coating for the high-binding force etching pot is characterized by comprising the following components in detail: 1.0 to 5.0 parts by weight 0.05 To 0.3 part by weight of TEMPO, 0.5 to 1.5 part by weight of NaBr, 5.0 to 20.0 parts by weight of NaClO containing 9 to 10mmol of available chlorine, 5.0 to 20.0 parts by weight of organosilicon-polyimide block copolymer, 2.0 to 10.0 parts by weight of nano polyurethane microsphere, 15.0 to 25.0 parts by weight of 1M HCl, 15.0 to 25.0 parts by weight of 1M 0.02-0.15 Parts by weight of glacial acetic acid, 5.0-15.0 parts by weight of ultrafine silicon carbide powder, and 0.2-1.0 parts by weight 3.0 To 10.0 parts by weight of ascorbic acid solution, 0.5 to 3.0 parts by weight of TEOS, 0.5 to 3.0 parts by weight of modified hydroxyapatite, 5.0 to 12.0 parts by weight of nano boron nitride lamellar, 3.0 to 10.0 parts by weight of silicon nano whisker, 1.0 to 5.0 parts by weight of bio-based wetting agent and 60.0 to 80.0 parts by weight of ceramic base material.
  2. 2. The ceramic coating special for the high-binding force etching pot according to claim 1, wherein the ceramic coating consists of a surface coating and a bottom coating.
  3. 3. The ceramic paint special for high-binding force etching pot as set forth in claim 2, wherein the primer is modified Is that Then cross-linking the three-dimensional network structure coating with organosilicon-polyimide segmented copolymer, nano polyurethane microsphere and superfine silicon carbide powder, wherein the structural formula of the organosilicon-polyimide segmented copolymer is as follows - , Is the benzene tetracarboxylic dianhydride, and the benzene tetracarboxylic dianhydride, Is diaminodiphenyl ether, the structural formula of the nano polyurethane microsphere is , Is a hexamethylene diisocyanate which is used as a reactive group, Is a polycaprolactone polyol.
  4. 4. The special ceramic coating for the high-binding force etching pot as claimed in claim 2, wherein the surface layer is formed by ultrasonic mixing of a nano boron nitride sheet layer, silicon nano whisker and a bio-based wetting agent and then embedding the mixture into a ceramic base material, Formed in ascorbic acid solution, TEOS and modified hydroxyapatite The surface coating of the three-dimensional heat conduction enhanced network system is obtained by coating, the bio-based wetting agent is hydrophilic ester with hydroxyl generated by transesterification reaction of soybean oil and glycerin, the modified hydroxyapatite is obtained by replacing strontium, magnesium and zinc ions in the hydroxyapatite with calcium ions, and the ceramic-based material is obtained by mixing silica and alumina=1:1-4:1.
  5. 5. The layered coating method of the special ceramic coating for the high-binding force etching pot is characterized by comprising the following steps of: S1, using HF to etch the surface of a pot substrate: the mixed etching solution is subjected to chemical etching, and then is thoroughly washed by deionized water immediately and dried; s2 KH-550 was dissolved in THF followed by 1M HCl, 1M was added The aqueous solution is slowly heated to the room temperature of 25 ℃ and stirred for 4 to 6 hours at the rotation speed of 500rpm, after the reaction is finished, dichloromethane extraction, saturated saline water washing, anhydrous magnesium sulfate drying are used, and finally rotary evaporation is carried out to obtain ; S3, in S2 Adding TEMPO and NaBr into acetone, stirring the mixture in an ice-water bath at 0+ -2deg.C for 5min, adding saturated sodium bicarbonate into NaClO to regulate pH, slowly dripping NaClO to the mixture, stirring at 0-5deg.C for 2 hr, extracting with ethyl acetate, washing with 5% sodium thiosulfate solution and saturated saline, and rotary evaporating to obtain the final product ; S4, preparing the S3 Dissolving in anhydrous toluene, mixing deionized water and glacial acetic acid solution, placing in anhydrous toluene, stirring vigorously at 1500rpm, rotary evaporating, and immediately evaporating Sealing and preserving; S5, dispersing the organosilicon-polyimide segmented copolymer and the nano polyurethane microsphere in absolute ethyl alcohol, then performing ultrasonic dispersion, and preparing the polyurethane microsphere in S4 Adding the superfine silicon carbide powder into the mixed system, stirring for 30 minutes at 25 ℃ to obtain primer slurry; S6, spraying the coating prepared in the S5 on the surface of the etching pot substrate to form a coating with the thickness of 80 mu m, and then curing the coating at a high temperature; s7, adding the nano boron nitride sheet, the silicon nano whisker and the bio-based wetting agent into absolute ethyl alcohol together, stirring for 20min at a rotating speed of 8000rpm, and then performing frequency ultrasonic treatment to obtain a sheet-whisker three-dimensional heat conduction reinforcing network system; s8, slowly adding the ceramic base material Then dropwise adding 0.1M ascorbic acid solution, stirring at 45deg.C for 30min, adding TEOS and modified hydroxyapatite, adjusting pH to 9.0, and stirring And (3) a coating layer, wherein the sheet-whisker three-dimensional heat conduction enhanced network system and the bio-based wetting agent prepared in the step (S7) are added and stirred for 30min at the rotating speed of 300rpm, and then glacial acetic acid is added dropwise to adjust the pH value of the system and the pH value is defoamed in vacuum to obtain a surface coating layer; And S9, washing the bottom coating with deionized water and drying for 10min at the temperature of 80 ℃, then coating the surface coating prepared in the step S8 on the surface, controlling the thickness of a wet film to be 50 mu m, and finally drying the coated substrate at high temperature to obtain the etching pot.
  6. 6. The layered coating method of the ceramic coating special for the high-binding-force etching pot according to claim 5, wherein the HF in S1: The etching solution is mixed in a volume ratio of (1:3) - (1:5), and is chemically etched for 5-15 minutes at 25-40 ℃, and KH-550 is dissolved in THF under the condition of using an ice water bath at 0+ -2 ℃ in S2.
  7. 7. The layered coating method of the ceramic coating special for the high-binding force etching pot according to claim 5, wherein in S3, saturated sodium bicarbonate is added into NaClO to adjust the pH of the solution to 8.5-9.5, and in S4, the finally obtained product is placed in a refrigerator with the temperature of minus 20 ℃ for sealing and preservation after rotary evaporation under the environment of 30+/-5 ℃.
  8. 8. The layered coating method of a ceramic coating special for a high-binding force etching pot as claimed in claim 5, wherein the step S5 is carried out by dispersing the organosilicon-polyimide segmented copolymer and the nano polyurethane microsphere for 30 minutes by using 50kHz ultrasonic, and then sequentially adding Ultrasonic mixing of superfine silicon carbide powder to obtain a primer, curing the primer in an environment of 80 ℃ for 20 minutes in S6, and curing the primer in an environment of 180 ℃ for 2 hours.
  9. 9. The layered coating method of the special ceramic coating for the high-binding force etching pot according to claim 5, wherein in S7, a nano boron nitride sheet layer, a silicon nano whisker and a bio-based wetting agent are subjected to ultrasonic treatment at an ultrasonic frequency of 50kHz for 30min, and glacial acetic acid is added in S8 to enable the pH value of the system to reach 4.0-4.5, and the surface coating is obtained through vacuum defoaming.
  10. 10. The layered coating method of the ceramic coating special for the high-binding force etching pot according to claim 5, wherein in S9, the coating is firstly dried for 20min under the environment of 80 ℃, then dried for 30min under the environment of 120 ℃, and finally dried for 1 hour under the environment of 180 ℃ to obtain the etching pot.

Description

Ceramic coating special for high-binding force etching pot and layered coating method thereof Technical Field The invention relates to the technical field of chemical industry and material synthesis, in particular to a ceramic coating special for a high-binding force etching pot and a layered coating method thereof. Background In daily household cooking, the frying pan is used as one of kitchen ware with highest use frequency and is subjected to complex use environments such as high-temperature heating, quenching and quenching, frequent scraping, grease contact and the like for a long time. The traditional non-stick pan is usually coated with polytetrafluoroethylene, but has certain non-stick property, but is easy to release harmful substances at high temperature, and has poor wear resistance, easy peeling and limited service life. In recent years, etching pans have been popular with consumers because they cater to the cooking habits of consumers with which they can use a spatula. Ceramic coating etching cookware is gradually favored by the market due to the advantages of high temperature resistance, innocuity, easy cleaning and the like. However, the existing ceramic coating has the problems of insufficient binding force, easy microcracking, local spalling and the like in long-term high-temperature cooking and cold-hot alternating use. Especially under the conditions of high-temperature dry combustion, metal shovel scraping or long-time stewing and boiling, stress peeling is easily generated between the coating and the metal substrate due to mismatching of thermal expansion coefficients, so that service life is influenced, and the substrate is possibly exposed, so that cooking safety and food health are influenced. Most ceramic coating etching cookware in the market at present adopts a three-layer composite coating structure, construction is more complicated, and the bottom layer often lacks strong chemical bonding with a metal substrate, so that heat conduction uniformity, wear resistance and long-acting non-stick performance are difficult to be considered. In the high-temperature continuous use and frequent cleaning processes, the coating is easy to generate local, falling or uneven heat conduction, and the cooking effect and the durability of the cooker are affected. Therefore, developing a ceramic coating etching pot which can adapt to a household high-temperature cooking environment, has excellent binding force, wear resistance, heat conduction uniformity and health safety, and has become an important direction for technical upgrading in the kitchen ware industry. The ideal coating system should possess good substrate adhesion, efficient thermal management and stable surface properties, thereby improving the overall pot life, cooking experience and safety. Disclosure of Invention In order to overcome the defects in the prior art, the embodiment of the invention provides the special ceramic coating for the etching pot with high binding force and the layered coating method thereof, and solves the problems of easy spalling, uneven heat conduction, interlayer separation and insufficient durability of the etching pot coating under the working condition of high-low temperature alternation. In order to achieve the above purpose, the present invention provides the following technical solutions: the special ceramic coating for the high-binding force etching pot specifically comprises the following components: 1.0 to 5.0 parts by weight 0.05 To 0.3 part by weight of TEMPO, 0.5 to 1.5 part by weight of NaBr, 5.0 to 20.0 parts by weight of NaClO containing 9 to 10mmol of available chlorine, 5.0 to 20.0 parts by weight of organosilicon-polyimide block copolymer, 2.0 to 10.0 parts by weight of nano polyurethane microsphere, 15.0 to 25.0 parts by weight of 1M HCl, 15.0 to 25.0 parts by weight of 1M0.02-0.15 Parts by weight of glacial acetic acid, 5.0-15.0 parts by weight of ultrafine silicon carbide powder, and 0.2-1.0 parts by weight3.0 To 10.0 parts by weight of ascorbic acid solution, 0.5 to 3.0 parts by weight of TEOS, 0.5 to 3.0 parts by weight of modified hydroxyapatite, 5.0 to 12.0 parts by weight of nano boron nitride lamellar, 3.0 to 10.0 parts by weight of silicon nano whisker, 1.0 to 5.0 parts by weight of bio-based wetting agent and 60.0 to 80.0 parts by weight of ceramic base material. Preferably, the ceramic coating consists of a top coating and a bottom coating. Preferably, the primer is modifiedIs thatThen cross-linking the three-dimensional network structure coating with organosilicon-polyimide segmented copolymer, nano polyurethane microsphere and superfine silicon carbide powder, wherein the structural formula of the organosilicon-polyimide segmented copolymer is as follows-,Is the benzene tetracarboxylic dianhydride, and the benzene tetracarboxylic dianhydride,Is diaminodiphenyl ether, the structural formula of the nano polyurethane microsphere is,Is a hexamethylene diisocyanate which is used as