Abstract: The anatase TiO2 nanoparticles with diameter of smaller than 20 nm were prepared in a nonaqueous sol-gel approach, which was modified with 3-(trimethoxysilyl)propyl methacrylate and dispersed in a PS solution in para-xylene. TiO2 containing solution was spin-coated to a film, in which the TiO2 contents was up to 95 wt %. UV-protective properties were examined by a UV-Vis spectrometer. The experiments indicated that the UV-protective property was enhanced with increasing TiO2 content. The transmittance of visible light became saturated, rather than linearly decreased. When the particle content was 95 wt %, the transmissivity was still higher than 82 %.

Key words: polystyrene, nano-titanium dioxide, high particle content, high transparency, ultraviolet shielding