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CN-122011814-A - Antistatic water-based ceramic coating and preparation method thereof

CN122011814ACN 122011814 ACN122011814 ACN 122011814ACN-122011814-A

Abstract

The application relates to the field of antistatic coatings, in particular to an antistatic water-based ceramic coating and a preparation method thereof, wherein the antistatic water-based ceramic coating comprises, by weight, 20-50 parts of silica sol, 3-10 parts of alkoxy silane, 0.5-3 parts of epoxy silane, 8-15 parts of filler, 1-6 parts of dispersing agent, 0.05-0.3 part of leveling agent, 0.05-0.4 part of defoaming agent, 0.1-0.6 part of HEUR thickener and 8-20 parts of static conductive agent, wherein the static conductive agent is at least one of ATO, CNT-based composite material, carbon black and AZO. According to the application, silica sol is used as a ceramic phase core, and the silica sol and alkoxy silane and epoxy silane are crosslinked to participate in the formation of a Si-O-Si network, so that the coating has excellent wear resistance and heat resistance, the alkoxy silane and epoxy alkyl can endow the coating prepared from the coating with ideal adhesive force, and a continuous conductive path is formed by adding the electrostatic conductive agent, so that the antistatic water-based ceramic coating with excellent performance is prepared.

Inventors

  • ZHANG XIN
  • ZHANG KAN
  • XU JIABIN
  • Cen Xinnuo
  • SHAO ZHILI
  • JIANG HAIYANG

Assignees

  • 慈溪市中一涂料有限公司

Dates

Publication Date
20260512
Application Date
20260209

Claims (10)

  1. 1. The antistatic water-based ceramic coating is characterized by comprising, by weight, 20-50 parts of silica sol, 3-10 parts of alkoxy silane, 0.5-3 parts of epoxy silane, 8-15 parts of filler, 1-6 parts of dispersing agent, 0.05-0.3 part of leveling agent, 0.05-0.4 part of defoaming agent, 0.1-0.6 part of HEUR thickening agent and 8-20 parts of static conductive agent; The static conductive agent is at least one of ATO, CNT-based composite material, carbon black and AZO.
  2. 2. The antistatic water-based ceramic coating according to claim 1, wherein the CNT-based composite material is CNT@SiC core-shell structure composite powder, and the preparation method of the CNT@SiC core-shell structure composite powder comprises the following steps: s1, carrying out plasma etching on CNT powder under a mixed atmosphere of Ar/O 2 , dispersing the etched CNT powder in a Tris-HCl buffer solution, and carrying out ultrasonic dispersion to obtain a CNT dispersion; S2, adding dopamine hydrochloride into the CNT dispersion liquid, stirring for 12-24 hours, centrifuging, collecting the lower precipitate, washing and drying to obtain modified CNT powder; S3, adding the modified CNT powder into absolute ethyl alcohol, performing ultrasonic dispersion to obtain CNT ethanol dispersion liquid, adding a silicon source into the CNT ethanol dispersion liquid, standing and curing, centrifuging, collecting lower-layer sediment, washing, centrifuging and drying to obtain precursor powder; s4, calcining the precursor powder for 2-4 hours at 1400-1600 ℃ in an inert atmosphere, and cooling to room temperature to obtain initial CNT@SiC core-shell structure composite powder; s5, heating the initial CNT@SiC core-shell structure composite powder to 400-500 ℃ at the concentration of 5% O 2 , preserving heat for 0.5-2h, and cooling to room temperature to obtain the CNT@SiC core-shell structure composite powder.
  3. 3. The antistatic water-based ceramic coating according to claim 2, wherein the static conductive agent is a mixture of ATO and CNT@SiC core-shell structure composite powder.
  4. 4. An antistatic aqueous ceramic coating according to claim 3, wherein the mixing mass ratio of ATO to CNT@SiC core-shell structured composite powder is (4-9): 1.
  5. 5. An antistatic aqueous ceramic coating according to claim 1, wherein the filler comprises at least one of boehmite, nano-alumina, mica powder, hexagonal boron nitride.
  6. 6. An antistatic aqueous ceramic coating according to claim 1, wherein at least one of a zirconium sol and an aluminum sol is further added.
  7. 7. The antistatic water-based ceramic paint according to claim 6, wherein the mixing mass ratio of the silica sol to the zirconium sol is 1 (0.2-0.5).
  8. 8. The antistatic water-based ceramic paint according to claim 7, wherein phytic acid is added in an amount of 0.5-3 parts.
  9. 9. A method for preparing an antistatic aqueous ceramic coating according to claims 1-8, characterized by comprising the steps of: step 1, adjusting the pH of silica sol to 3.2-5.2, and then adding the alkoxy silane and the epoxy silane in the formula amount under the stirring state to obtain a sol-silane mixture; step 2, adding the static conductive agent and the filler with the formula amount into the dispersant water solution, and uniformly mixing to obtain mixed slurry; and 3, adding the mixed slurry into the silica sol-silane mixture, stirring and mixing, adding the leveling agent, the defoaming agent and the thickening agent according to the formula amount, and mixing to obtain the antistatic water-based ceramic coating.
  10. 10. The method for preparing the antistatic water-based ceramic paint according to claim 9, wherein in the step 1, zirconium sol and/or aluminum sol, alkoxy silane and epoxy silane are added in a stirring state after the pH of silica sol is adjusted to 3.2-5.2 to obtain a sol-silane mixture, and in the step 2, the formula amount of phytic acid is added into the dispersing agent aqueous solution, and then the formula amount of static conductive agent and filler are added and uniformly mixed to obtain mixed slurry.

Description

Antistatic water-based ceramic coating and preparation method thereof Technical Field The application relates to the field of antistatic coatings, in particular to an antistatic water-based ceramic coating and a preparation method thereof. Background When the motor comb, hair curler and like-high Wen Meifa tool is in operation (usually in the temperature range of 150-230 ℃), static charges are extremely prone to build up due to the continuous friction of the dry hair with the high-resistance surface. The hair brush not only can cause discharge stinging feel during use, but also can aggravate hair damage due to long-term electrostatic action, so that the hair scales are opened, the hair is bifurcated and is easy to break, and meanwhile, the dust and microorganisms in the environment are adsorbed by the static electricity, so that the hair cleaning and health are affected. Therefore, the application of antistatic coating on the surface of these small household appliances becomes a key technical means for improving user experience and protecting hair quality. The existing antistatic thought is to build a charge dissipation path by adding antistatic agents, such as polyether quaternary ammonium salt antistatic agents and high molecular permanent antistatic agents, or by adding single inorganic conductive fillers. However, in the use process of the antistatic coating obtained by the preparation method, especially under the conditions of repeated high-temperature work and cooling alternation and frequent friction, the antistatic performance tends to decay faster, and the comprehensive requirements of users on instant charge dissipation, low surface resistance and lasting stability cannot be met for a long time. Disclosure of Invention In order to improve the antistatic property of the coating, the application provides an antistatic water-based ceramic coating and a preparation method thereof. In a first aspect, the application provides an antistatic water-based ceramic coating, which adopts the following technical scheme: An antistatic water-based ceramic coating comprises, by weight, 20-50 parts of silica sol, 3-10 parts of alkoxy silane, 0.5-3 parts of epoxy silane, 8-15 parts of filler, 1-6 parts of dispersing agent, 0.05-0.3 part of leveling agent, 0.05-0.4 part of defoaming agent, 0.1-0.6 part of HEUR thickener and 8-20 parts of static conductive agent; The static conductive agent is at least one of ATO, CNT-based composite material, carbon black and AZO. By adopting the technical scheme, silica sol is used as a ceramic phase core, silicon hydroxyl groups on the surfaces of silica particles are mutually close to each other in the water evaporation and curing process, condensation reaction is carried out to form firm Si-O-Si covalent bonds, the Si-O-Si covalent bonds are crosslinked and cured with alkoxy silane and epoxy silane to jointly participate in the formation of a Si-O-Si network, a compact coating similar to ceramic is formed, the ceramic-like compact coating has excellent wear resistance and ideal heat-resistant cycle performance, the application requirements of small household electrical appliance heating elements and adjacent parts can be met, epoxy groups in the epoxy silane can be subjected to chemical reaction with hydroxyl groups, amino groups and the like on the surfaces of base materials to improve the binding force between the coating and the base materials, and the static conductive agent can be uniformly dispersed in a system under the action of a dispersing agent, so that a continuous conductive path is formed, and the static charge on the surfaces of the base materials can be rapidly led out, so that the resistance on the surfaces of the coating made of the antistatic water-based ceramic coating can be in a static dissipation window of 10 6–109 ohm/sq. ATO and AZO belong to light-colored transparent conductive materials, CNT and carbon black are usually black or opaque materials, but the ATO and AZO have excellent conductivity and stable chemical properties, can form an effective conductive path in a coating, and can adapt to application requirements of different colors by selecting different electrostatic conductive agents. The silica sol is used as a ceramic phase core, and after being crosslinked with the alkoxy silane and the epoxy silane, the silica sol can participate in the formation of a Si-O-Si network to form a compact coating similar to ceramic, the coating not only has excellent wear resistance, but also has ideal heat resistance, and organic groups carried in the alkoxy silane and the epoxy alkyl can endow the coating prepared from the coating with ideal adhesive force, and continuous conductive paths can be formed in a system by adding the electrostatic conductive agent, so that the antistatic water-based ceramic coating with excellent performance is prepared. Preferably, the CNT-based composite material is cnt@sic core-shell structure composite powder, and the preparation