A kind of superhydrophilic functional coating based on cage polysilsesquioxane and preparation method thereof

Abstract

The invention discloses a superhydrophilic functional coating based on caged polysilsesquioxane. The precursor solution of the superhydrophilic functional coating includes a main body resin, hydrophilic nano silicon dioxide particles and a solvent; the The host resin is an alkoxyl-bearing host resin prepared by reacting epoxy-based cage polysilsesquioxane and secondary aminosiloxane. The precursor solution of the superhydrophilic functional coating of the present invention includes a main body resin, hydrophilic nano silicon dioxide particles and a solvent. The main resin with alkoxy reactive functional groups is prepared by reacting epoxy cage polysilsesquioxane with secondary aminosiloxane, and with hydrophilic nano-silica particles, cage polysilsesquioxane The nanometer size effect of alkane and the size effect of hydrophilic nano silicon dioxide are used to prepare a superhydrophilic coating with a certain surface roughness and hydroxyl hydrophilic groups on the surface, and the water contact angle is less than 5°. At the same time, the presence of caged polysilsesquioxane can effectively promote the dispersion effect of nano-silica.

Description

technical field [0001] The invention belongs to the technical field of superhydrophilic materials, in particular to a cage polysilsesquioxane-based superhydrophilic functional coating and a preparation method thereof. Background technique [0002] Surface wettability is one of the important characteristics of solid surfaces, and its research progress has always attracted the attention and favor of scholars. Generally, the contact angle (CA) is used to characterize the degree of wetting of the liquid on the solid surface. When the contact angle between water and the solid surface is less than 5°, it is considered to be a super-hydrophilic surface. The degree of hydrophilicity depends on the structure and chemistry of the coating surface. Ingredients decide. Due to its good wetting properties, the super-hydrophilic surface can spread water instantly and evaporate quickly, preventing water droplets from sticking and staying on the surface, which can block and isolate dirt, and...

AI Technical Summary

Problems solved by technology

The single-component titanium dioxide superhydrophilic coating no longer exhibits hydrophilicity after being irradiated by ultraviolet light, but its long-term effect cannot be guaranteed indoors, which limits its application range

The surfactant is easy to lose, not resistant to wiping and solvents

[0005] On the other hand, many superhydrophilic coatings that introduce silica nanoparticles require high temperature treatment. For example, the Chinese invention patent with the notification number CN200610113975.0 is a superhydrophilic self-cleaning anti-fog coating, and its technical solution is electrostatic After assembly, high-temperature sintering forms a coarse metasurface to realize a superhydrophilic coating, and its preparation conditions are relatively harsh.

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