A series of transparent and super-hydrophilic TiO2/SiO2 composite films with high adhesion to the glass were fabricated
by dipping methods. The sol was prepared using peroxotitanium complex (PTC) as precursor by sol-gel process at low
temperature. The properties of transmittance, hydrophility and adhesion were characterized by ultraviolet-visible
spectrophotometer, water contact angle and the tape test, and the structure was analyzed by Fourier transform infrared
spectroscopy (FTIR). The relationship of structure, surfactant and the compound action of TiO2/SiO2 was investigated.
The results indicated that the fabricated films achieved excellent transmittance to slide glass of over 90%. Because of the
poor adhesion of pure TiO2 film, the TiO2/SiO2 composite film with polyvinyl alcohol (PVA) as the surfactant was
prepared. The tape test indicated that the composite film had a steady adhesion on the surface of glass. At the same time,
the water contact angle of the films was blow 5° after exposed to the UV light. Furthermore, the glass insulators with
TiO2/SiO2 composite film were placed in the outdoor environment, and it showed self-cleaning ability after water
drenching. It was proved from the experiments that the transparent TiO2/SiO2 hybrid films with self-cleaning property
possessed potential application in the fields of outdoor glass constructions, suspended glass disk insulators and auto
windshields.
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