Self-cleaning, antibacterial and anti-fog film

Abstract

The invention relates to a self-cleaning, antibacterial and anti-fog film. The self-cleaning, antibacterial and anti-fog film is prepared by acidizing TiO2 nano-particle powder, adding a surfactant, a stabilizer, an acid and the like, preparing, and concentrating to obtain TiO2 nano-particle slurry, adequately mixing the slurry with an organic high-molecular polymer and auxiliaries, and drying to obtain master batches; and commonly plasticizing, extruding and calendaring the master batches to prepare the self-cleaning, antibacterial and anti-fog film, wherein the constituents of the film comprise 72.89-92.34 wt% of the organic high-molecular polymer, 0.5-22.63 wt% of TiO2 nano particles and 3.36-23.45 wt% of auxiliaries. The film has a high visible light transmittance, self-cleaning, antibacterial and anti-fog functions, reflection and control effects on ultraviolet light rays and far-infrared light rays, antistatic property and anti-electromagnetic radiation property; the film is prepared with no need of high vacuum and high-temperature heating, simple and practicable equipment, and low cost; the film can be compounded with pressure-sensitive adhesive and heat-sensitive adhesive, used as the films of building glass, and the windows of vehicles and ships for improving the self-cleaning, antibacterial and anti-fog functions of the building glass and the windows, and used for performing transformation and large-area field construction on the installed glass and windows.

Description

technical field [0001] The invention belongs to the field of composite films of organic polymers and nano photocatalytic particles, in particular to a self-cleaning, antibacterial and anti-fog film. Background technique [0002] At present, most of the more researched semiconductor photocatalysts are n-type wide bandgap semiconductors, such as Ti0 2 , ZnS, Sn0 2 , ZnO, SrTi0 3 , V 2 0 5 Wait. Among these semiconductor compounds, Ti0 2 , CdS and ZnO have better photocatalytic activity, but some semiconductors such as PbS contain heavy metal ions, and CdS and ZnO are unstable when exposed to light, and are easy to corrode and produce Cd 2+ , Zn 2+ Ions, these heavy metal ions have a great impact on the environment. Compared with other materials, Ti0 2 It has the advantages of high catalytic activity, strong oxidation ability, high chemical and light stability, good heat resistance, non-toxicity, low price, abundant sources, etc., and has become one of the most promisi...

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Problems solved by technology

[0003] In the prior art, nano-sized TiO is mostly coated on the surface of inorganic material substrates such as glass and ceramics. 2 Thin films, the main methods are: magnetron sputtering method, chemical vapor deposition (CVD) and sol-gel method, etc. These preparation methods have disadvantages such as high equipment requirements, difficulty in controlling the particle size of the film, and inability to uniformly form a large area film. ; There are also nanoscale TiO 2 Added to coatings to make coatings with self-cleaning and antibacterial functions, but many have TiO 2 The disadvantages of low utilization rate of solar energy, insufficient photocatalytic activity, and insufficient photocatalytic stability

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