Super-hydrophilic, self-cleaning and antifogging coating and preparation method thereof

Abstract

The invention discloses a super-hydrophilic, self-cleaning and antifogging coating. The coating comprises a bonding layer, and hydrophilic composite nanoparticles with rough surfaces, wherein one surface of the bonding layer is bonded with the hydrophilic composite nanoparticles, and the other surface of the bonding layer is connected with a base material; and the hydrophilic composite nanoparticles are prepared from amino silane modified silicon dioxide nanoparticles and epoxy silane modified silicon dioxide nanoparticles by ring-opening reaction bonding of amino and epoxy. According to the super-hydrophilic, self-cleaning and antifogging coating, the hydrophilic composite nanoparticles with the rough surfaces are adopted and prepared from two silicon dioxide nanoparticles by chemical bond combination; and in addition, a hydrophilic polymer which can be bonded with the hydrophilic composite nanoparticles is used as a filming bonding agent for realizing the force bonding of the base material and the rough hydrophilic composite nanoparticles, thus the high-temperature sintering treatment is avoided, and the technical problem of severe condition of the preparation of an existing super-hydrophilic coating can be effectively overcome.

Description

technical field [0001] The invention relates to the field of new chemical materials, in particular to a superhydrophilic self-cleaning anti-fog coating and a preparation method thereof. Background technique [0002] The concept of "self-cleaning" began in the 1990s. Self-cleaning is divided into superhydrophobic and superhydrophilic according to its principle. Superhydrophobic coatings are coatings with a water contact angle > 150° and a rolling angle < 10°. , its self-cleaning principle mainly realizes the self-cleaning effect through the rolling of surface water droplets to take away surface pollutants; the super-hydrophilic coating has a water contact angle of <5°, which is finally achieved by forming a water film on the surface to take away surface pollutants Self-cleaning effect. [0003] Fogging refers to the phenomenon that moisture or steam condenses on the surface of the product to form tiny water droplets. The fogging of transparent or imaging products wi...

AI Technical Summary

Problems solved by technology

At present, super-hydrophilic coatings are mostly realized by introducing nanoparticles such as titanium dioxide or hydrophilic silica, alumina, etc.: super-hydrophilic coatings based on titanium dioxide need to be able to achieve super-hydrophilicity of the surface under the condition of ultraviolet light irradiation phenomenon, its long-term effect cannot be guaranteed indoors or in a dark environment, which limits its application range; most superhydrophilic coatings introduced with silica nanoparticles require high temperature treatment, such as electrostatic assembly and then sintering to form a coarse metasurface Structure (CN200610113975.0) to achieve super-hydrophilic coating requires sintering at 550°C for 2 hours, and the preparation conditions are relatively harsh

Generally speaking, the self-cleaning, anti-fog effect, durability or preparation conditions of the super-hydrophilic coatings of these technologies are not ideal yet.

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