Color protection capability of PU paint enhanced with dispersed nano particles of TiO2, SiO2, ZnO, Nanoclay hydrophilic
Keywords:
PU paint,, color protection, nano particleAbstract
Wood used in outdoor conditions is extremely influenced by environmental factors such as light, temperature, humidity, wind and so on. These processes, at the same time are causing greatly effect on the durability of the wood, especially on the color of wood. Therefore, coating materials such as paints, varnishes, resinous oils... are employed on the surface of wood in order to reduce these adverse effects. In this study, polyureathane (PU) paint reinforcement with nano particles (TiO2, SiO2, ZnO and nanoclay) were investigated on Styrax tonkinensis (Pierre) Craib. ex Hardw and Acacia hybrid
wood. All samples were then exposed under natural environmental condition in 12 months. The results of this study were compared to those of common PU paint. It is indicated that with the use of 0.1% nano TiO2 (<100nm), 0.1% nano TiO2 (21nm), 0.1% nano ZnO and 0.1% nano clay could significantly increase wood color protection, the discoloration of both wood species coated with nano modified PU were less than 12%, while ordinary PU treated wood was 18%. This value of control samples was was 30%. From above indication, it can be concluded that the reinforcement of PU paint with nano particles can
significant reduce discoloration of wood.
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