TiO2/PI hybridized film with optic catalytic self-cleaning function and preparation method thereof

Abstract

The invention provides a TiO2 / PI hybridization film with photocatalysis and self-cleaning function and the process for preparing it, which is characterized in that adding organic monomer in the process of preparing thin films with sol-gel processing, with titanium collosol hydrolytic polymerization happening, forming medlin phase (PAA) in original position polyreaction, finally, forming a nanometer crystal phase TiO2 / PI hybridization film after heat treating. The thickness of hybridization film is not less than 300nm, which higher than anatase nanometer crystal phase obtained from common puretitanium collosol. There isn't crackle and flake for film in the process of heat treating. Chosing a suitable medlin leading body, a Ti-S bond is formed at the same time of forming a hydrogen bond inthe hybridization film, which endowing film with photocatalysis and self-cleansing effect under the visible light. And the photocatalysis and self-cleansing effect of the film are higher than the photocatalysis activity of common titanium oxide nanometer crystal phase film, meanwhile, the film has good radiation resistant and chemical stability.

Description

TiO2 / PI hybrid film with photocatalytic self-cleaning function and preparation method thereof Technical field The invention relates to an in-situ synthesized titanium oxide nanocrystal and polyimide (TiO2 / PI) hybrid film, in particular to a kind of glass coated on architectural glass, automobile glass, optical glass, etc., and architectural glass Films with photocatalytic degradation and self-cleaning functions on the surface of various inorganic materials such as ceramics and sanitary ceramics. The hybrid film of the present invention has significant photocatalytic degradation function under ultraviolet-visible light wave irradiation. Background technique Nano-scale titanium oxide powder and titanium oxide nanocrystalline film have the characteristics of photocatalytic degradation of organic and inorganic pollutants under ultraviolet light. Various materials coated with titanium oxide nanocrystalline film on the surface are regarded as having a self-cleaning function. Method...

AI Technical Summary

Problems solved by technology

Due to the high thickness of the film prepared by sol spraying, it cannot be used for the preparation of titanium oxide nanocrystalline film. Therefore, improving the properties of the sol and increasing the thickness of the primary coating have become the key to improving the sol-gel coating process.

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