CN-122011819-A - Preparation method of anti-reflection wear-resistant water-resistant self-cleaning anti-fog super-hydrophilic coating

CN122011819ACN 122011819 ACN122011819 ACN 122011819ACN-122011819-A

Abstract

The invention discloses a preparation method of a self-cleaning anti-fog super-hydrophilic coating with anti-reflection, wear resistance and water resistance, and belongs to the technical field of bionic super-infiltration interfaces on surfaces of transparent materials. The raw materials of the anti-reflection, wear-resistant and water-resistant self-cleaning anti-fog super-hydrophilic coating comprise acetic acid, hollow nano particles, nano tubes, modified aluminum dihydrogen phosphate, tetraethyl orthosilicate, a silane coupling agent, a surfactant and the balance of solvent. The invention constructs the super-hydrophilic composite coating integrating the functions of anti-reflection, wear resistance, water resistance, anti-fog and self-cleaning. The coating takes hollow nano particles and nano tubes as functional fillers, a large amount of-OH existing on the surface of the coating can be dehydrated and condensed with tetraethyl orthosilicate, a silane coupling agent and a surfactant to form a chemical cross-linked compact network structure, so that the coating has excellent wear resistance and water resistance, and the preparation method is simple and convenient and has good application value.

Inventors

DENG WEILIN
JIANG JIHONG
LI YIWEI
WANG YIRAN
WU ZHAOFENG
LIU YUANYUAN
Tan Wendie

Assignees

新疆大学

Dates

Publication Date: 20260512
Application Date: 20260331

Claims (10)

1. The self-cleaning anti-fog super-hydrophilic coating with anti-reflection, wear resistance and water resistance is characterized by comprising the following raw materials in percentage by mass: 2.0 to 4.0 wt percent of acetic acid, 0.2 to 1.0 wt percent of hollow nano particles, 0.3 to 0.6 wt percent of nano tubes, 0.2 to 0.5 wt percent of modified aluminum dihydrogen phosphate, 0.5 to 3 wt percent of tetraethyl orthosilicate, 1.0 to 2.5 wt percent of silane coupling agent, 0.4 to 3 wt percent of surfactant and the balance of solvent.
2. The anti-reflection, wear-resistant and water-resistant self-cleaning anti-fog super-hydrophilic coating according to claim 1, wherein the hollow nano particles are hollow silica nano particles with the particle size of 40-70 nm.
3. The anti-reflection, wear-resistant and water-resistant self-cleaning anti-fog super-hydrophilic coating according to claim 1, wherein the nanotubes are halloysite nanotubes, the tube diameter is 10-30 nm, and the tube length is 0.5-2 μm.
4. The anti-reflection, wear-resistant and water-resistant self-cleaning anti-fog super-hydrophilic coating according to claim 1, wherein the modified aluminum dihydrogen phosphate is copper oxide modified aluminum dihydrogen phosphate.
5. The anti-reflection, wear-resistant and water-resistant self-cleaning anti-fog super-hydrophilic coating according to claim 1, wherein the silane coupling agent is gamma-methacryloxypropyl trimethoxysilane or gamma-aminopropyl triethoxysilane.
6. The anti-reflection, wear-resistant and water-resistant self-cleaning anti-fog super-hydrophilic coating according to claim 1, wherein the surfactant is one or more of ammonia-end polydimethylsiloxane, polyether-modified polydimethylsiloxane and polyether-modified heptamethyltrisiloxane.
7. The anti-reflection, wear-resistant and water-resistant self-cleaning anti-fog super-hydrophilic coating according to claim 1, wherein the solvent is water and ethanol in a volume ratio of 1:1-3.
8. A method for preparing the anti-reflection, wear-resistant and water-resistant self-cleaning anti-fog super-hydrophilic coating as claimed in any one of claims 1 to 7, which comprises the following steps: mixing the acetic acid, the hollow nano particles, the nano tubes, the modified aluminum dihydrogen phosphate, the tetraethyl orthosilicate, the silane coupling agent, the surfactant and the solvent to obtain the self-cleaning anti-fog super-hydrophilic coating with anti-reflection, wear resistance and water resistance.
9. The method of claim 8, wherein the mixing is performed by stirring at a temperature of 50 ℃ and a rotational speed of 1000-1500 rpm of 60 min.
10. The preparation method of the anti-reflection wear-resistant water-resistant self-cleaning anti-fog super-hydrophilic coating is characterized by comprising the following steps of: coating the anti-reflection, wear-resistant and water-resistant self-cleaning anti-fog super-hydrophilic coating on the surface of a substrate, and curing to form the anti-reflection, wear-resistant and water-resistant self-cleaning anti-fog super-hydrophilic coating.

Description

Preparation method of anti-reflection wear-resistant water-resistant self-cleaning anti-fog super-hydrophilic coating Technical Field The invention relates to the technical field of bionic super-infiltration interfaces on surfaces of transparent materials, in particular to a preparation method of a self-cleaning anti-fog super-hydrophilic coating with anti-reflection, wear resistance and water resistance. Background The transparent material has wide application in the technical fields of photovoltaic systems, agricultural greenhouses, unmanned aerial vehicle optical lenses, sensor protection covers and the like. However, the transparent material often causes a significant decrease in light transmittance during use due to surface fogging or dust deposition, thereby affecting its functional performance and increasing the safety risk of use. In addition, due to frequent cleaning and maintenance caused by fog and pollution, the maintenance cost is increased, and the service life of the equipment is shortened. Therefore, development of the anti-fog and self-cleaning coating technology with high efficiency and durability on the surface of the transparent material has important application value. The super-hydrophilic coating can enable liquid drops to rapidly spread on the surface of the super-hydrophilic coating to form a uniform water film, can effectively reduce the transmission loss of visible light, forms an isolation layer between pollutants and a material substrate, can realize efficient anti-fog and self-cleaning performances, and has good application prospects. However, the traditional TiO 2 -based super-hydrophilic coating depends on light to excite on the surface to generate rich hydroxyl groups, so that the coating cannot be effectively applied in dark or low-light environments and has low efficiency. To ameliorate this limitation, researchers have produced a variety of superhydrophilic coatings by incorporating surfactants, however, in practical applications such coatings are prone to surfactant run-off in a wet or rubbed environment, resulting in poor durability of the coating. On the other hand, the conventional coating preparation method, such as vapor deposition, laser etching and the like, generally has the problem of complex process, is limited by the size of the substrate, has high manufacturing cost, restricts the popularization of the coating in large-scale application, and still needs further improvement. Disclosure of Invention The invention aims to provide a preparation method of a self-cleaning anti-fog super-hydrophilic coating with anti-reflection, wear resistance and water resistance so as to solve the problems in the background art. The invention constructs the super-hydrophilic composite coating integrating the functions of anti-reflection, wear resistance, water resistance, anti-fog and self-cleaning. The coating takes hollow nano particles and nano tubes as functional fillers, and a large amount of-OH existing on the surface of the coating can be dehydrated and condensed with tetraethyl orthosilicate, a silane coupling agent and a surfactant to form a chemical cross-linked compact network structure, so that the coating has excellent wear resistance and water resistance. In order to achieve the above purpose, the present invention provides the following technical solutions: According to one of the technical schemes, the invention provides an anti-reflection wear-resistant water-resistant self-cleaning anti-fog super-hydrophilic coating, which comprises the following raw materials in percentage by mass: 2.0 to 4.0 wt percent of acetic acid, 0.2 to 1.0 wt percent of hollow nano particles, 0.3 to 0.6 wt percent of nano tubes, 0.2 to 0.5 wt percent of modified aluminum dihydrogen phosphate (ADPC for short), 0.5 to 3wt percent of tetraethyl orthosilicate, 1.0 to 2.5 wt percent of silane coupling agent, 0.4 to 3wt percent of surfactant and the balance of solvent. The addition amount of the modified aluminum dihydrogen phosphate in the present invention should not be excessively high. After testing by increasing the amount of modified aluminum dihydrogen phosphate (0.5 wt% or more) stepwise, it was found that the initial contact angle of the coating remained almost unchanged, but the light transmittance gradually decreased due to the change in surface roughness. When the addition amount of the modified aluminum dihydrogen phosphate is further increased to 3.0wt.%, the surface roughness is obviously reduced, which is unfavorable for constructing a surface micro-nano structure, and the hydrophilic performance of the coating is reduced. The invention adjusts the pH value of the solution to 4-6.5 by adding acetic acid. The acid-base nature of the feed system directly affects the morphology of the product after hydrolysis of tetraethyl orthosilicate. In the test process, the invention finds that the prepared coating can realize the anti-reflection effect under the acidic condition defined by t