Polymer coating liquid for self-cleaning glass and preparation method of polymer coating liquid

Abstract

The invention relates to polymer coating liquid for self-cleaning glass. The polymer coating liquid is prepared from high-stability silicon dioxide sol, organic silicon polyurethane resin, a long-chain alkyl silane coupling agent, a solvent and an auxiliary, wherein the high-stability silicon dioxide sol is prepared by taking tetraethoxysilane as a precursor, a modifier with a hydrophilic main chain and hydrophobic side chains as a core, absolute ethyl alcohol as a cosolvent and ammonia water as a catalyst, preparing core-shell silicon dioxide sol by a sol-gel method, then adding KH550 and stirring. The polymer coating liquid provided by the invention is a coating formed by compounding polyurethane resin and silicon dioxide sol, and the silicon dioxide sol is a core-shell sol particle prepared by taking a fluorine-containing modifier as a core, is uniform in size, is not easy to agglomerate in the coating, and is good in compatibility and high in storage stability; a film is easy to form, a formed coating is high in adhesive force, a super-hydrophobic coating is formed on the surface of a substrate, and the self-cleaning performance is achieved; the silicon dioxide sol particles can improve the high temperature resistance and wear resistance of the coating, and the durability of the coating is good.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polymer coating solution for self-cleaning glass and a preparation method thereof. Background technique [0002] Glass is an amorphous inorganic non-metallic material whose main component is silicon dioxide. It is widely used in buildings and plays the role of blocking wind and light. However, with the rapid development of the industry, the deterioration of the environment has become more and more serious, the degree of air pollution has increased, and the dust in the air has increased, making the facade of the building dusty, especially the transparent glass, which is followed by cleaning and care. The problem became more and more prominent. On the other hand, people have higher and higher requirements for the quality of life. Therefore, people urgently need a new type of glass that uses natural conditions to achieve self-cleaning effects. Self-cleaning glass comes...

AI Technical Summary

Problems solved by technology

However, the mechanical stability of the super-hydrophobic coating is difficult to maintain stability. Due to long-term exposure to the polluted environment, the surface of the super-hydrophobic coating is subjected to external impact and friction for a long time, the surface texture is damaged, and the water repellency gradually decreases.

However, if the mechanical properties of the surface are simply improved, the light transmittance will deteriorate and the original value of the glass will be lost.

And the coating formed by simply spraying silica sol on the glass surface will become more and more fragile in the long-term exposure to the sun and erosion of dirt, and the adhesion will decrease, resulting in the loss of hydrophobicity.

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