Novel anti-ultraviolet performances of thin films polyurethane containing nano-mixed oxides CeO ₂ -TiO ₂

Abstract

The nano-mixed oxides CeO 2 -TiO 2 was synthesized by gel combustion method using polyvinyl alcohol as fuel and mixtures of titanium trichloride and cerium(IV) nitrate at a relatively low calcination temperature of 550°C for 2 h. The prepared CeO 2 -TiO 2 nanoparticles with a specific area of 65.70 m 2 g −1 were dispersed in polyurethane matrix in different concentration conditions from 0.0 to 1.5 wt% to study ultraviolet durability following HONDA HES D 6501-97 standards. After 400 h of testing in the QUV accelerate weathering tester, the thin film containing 1 wt% CeO 2 -TiO 2 nano-mixed oxides has presented the noticeable capacity for absorbing ultraviolet light by only 6.8 g.u change in specular gloss at 60° and ΔE = 3.66 in color difference.