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Hydrophilic self-cleaning paint, composition for same, preparation method and application thereof

A technology of composition and coating, applied in the field of hydrophilic self-cleaning coating composition, which can solve the problems of poor durability of glass, easy adsorption of oily pollutants, large contact angle of coating, etc.

Active Publication Date: 2017-10-10
北京碳阳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic hydrophilic self-cleaning coating with nano-TiO 2 As the main raw material, it is sprayed on the surface of the glass to quickly form a layer of hydrophilic water film, which makes it difficult for dirt to adhere, and is washed down under the washing of rainwater to achieve the purpose of self-cleaning; however, this coating is also easy to absorb oily pollutants, And the durability on glass is not good
Organic hydrophilic self-cleaning coatings can make the coating film form a hydrophilic surface by adding a suitable hydrophilic agent, endowing the coating with self-cleaning properties; however, the formed coating has a large contact angle and the self-cleaning effect is not very obvious

Method used

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  • Hydrophilic self-cleaning paint, composition for same, preparation method and application thereof
  • Hydrophilic self-cleaning paint, composition for same, preparation method and application thereof
  • Hydrophilic self-cleaning paint, composition for same, preparation method and application thereof

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[0037] On the other hand, the present invention also provides a method for preparing a hydrophilic self-cleaning paint composition, wherein the method comprises the following steps:

[0038] (1) Under acidic conditions, the water dispersion of deionized water and carbon nanotubes is added dropwise to a mixture containing alcohol, tetraethyl orthosilicate and a modifier to obtain a modified composite sol;

[0039] (2) under acidic conditions, deionized water is added dropwise to the mixture containing butyl titanate, acetylacetone and alcohol to obtain nano titanium dioxide powder;

[0040](3) Mixing the nano titanium dioxide powder, the modified composite sol and alcohol.

[0041] Wherein, the pH value of the mixture containing alcohol, tetraethyl orthosilicate and modifying agent in step (1) is adjusted to 2-3; The selection of the acid for adjusting the pH value is not specifically limited, for example, it can be hydrochloric acid or nitric acid, Preferably hydrochloric aci...

Embodiment 1

[0063] This embodiment is used to illustrate the composition for hydrophilic self-cleaning coating of the present invention and hydrophilic self-cleaning coating and its preparation method and application

[0064] (1) 46g of absolute ethanol, 26g of ethyl orthosilicate and 29.5g of γ-(methacryloyloxy)propyltrimethoxysilane were mixed and stirred evenly, and the pH was adjusted to 2 with hydrochloric acid; 18g of deionized water was added dropwise at a rate of 0.1mL / s, and 1g of an aqueous dispersion of single-walled carbon nanotubes with a mass fraction of 0.5wt% was added dropwise at a rate of 0.05mL / s. stirring and reacting for 5 hours at a temperature of 60° C. to obtain the modified composite sol with a particle size of 80 nm;

[0065] (2) Mix and stir 10.6g butyl titanate and 10.5g acetylacetone evenly, mix and stir evenly with 30g absolute ethanol under stirring condition, adjust pH to 3 with hydrochloric acid; Add dropwise at a rate of 0.1mL / s, and continue to stir for...

Embodiment 2

[0076] This embodiment is used to illustrate the composition for hydrophilic self-cleaning coating of the present invention and hydrophilic self-cleaning coating and preparation method thereof

[0077] (1) 42g of absolute ethanol, 23g of tetraethyl orthosilicate and 28.5g of γ-glycidyloxypropyltrimethoxysilane were mixed and stirred evenly, and the pH was adjusted to 3 with hydrochloric acid; then, under stirring conditions, 20g Deionized water was added dropwise at a rate of 0.5mL / s, and 3g of an aqueous dispersion of single-walled carbon nanotubes with a mass fraction of 0.8wt% was added dropwise at a rate of 0.1mL / s, at a temperature of 100 Under the condition of stirring and reacting for 1 hour under the condition of ℃, the modified composite sol with a particle size of 15nm was obtained;

[0078] (2) Mix and stir 9.6g butyl titanate and 11.5g acetylacetone evenly, mix and stir evenly with 28g absolute ethanol under stirring condition, adjust pH to 2.5 with hydrochloric ac...

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Abstract

The invention relates to the field of nano functional paint and discloses hydrophilic self-cleaning paint, a composition for the same, a preparation method and application thereof. The composition comprises modified composite sol, nano titanium dioxide powder and alcohol, the modified composite sol is a compound obtained by enabling reaction of a water dispersion of the alcohol, tetraethoxysilane, modifier, deionized water and carbon nanotube in an acidic condition, wherein the modifier is one or multiple of gamma-glycidyl oxygen propyl trimethoxysilane, gamma-aminopropyl triethoxysilane and gamma-(methylacryloloxy)propyl trimethoxysilane. The hydrophilic self-cleaning material is high in environment-friendliness, high in weatherability, light transmittance and room-temperature film forming performance when being used on a photovoltaic power generation plate and can effectively reduce smirch adhesion and eliminate electrostatic influence.

Description

technical field [0001] The invention relates to the technical field of nano functional coatings, in particular to a hydrophilic self-cleaning coating composition, a hydrophilic self-cleaning coating and a preparation method and application thereof. Background technique [0002] According to the national energy industry policy, by 2020, domestic photovoltaic installed capacity will reach at least 50GW, and the opportunity for solar energy development has come. But at the same time, dust and other pollutants on the surface of solar panels affect the light transmittance, and generate static electricity to disturb the power generation current, especially in the north, affecting the power generation efficiency by more than 6.8% on average. Dust is difficult or needs to be cleaned frequently, resulting in practical problems such as increased cost, increased work difficulty, difficulty in fully utilizing design performance, and reduced power generation efficiency. [0003] At pres...

Claims

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Application Information

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IPC IPC(8): C09D183/06C09D183/08C09D7/12H02S40/10
CPCC08K7/24C08K2003/2241C08K2201/011C09D183/06C09D183/08H02S40/10Y02E10/50
Inventor 张林智云霞程雪
Owner 北京碳阳科技有限公司
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