Abstract:

This paper studied the process of preparing nano-sized TiO₂ slurry and manufacture of surface decorated wood-based panels which added nano-sized TiO₂ slurry as antimicrobial agent. The antimicrobial activity and mechanical properties of the panels were measured. The results showed that the good dispersity and store stability of the nano-sized TiO₂ slurry preparing in high speed mixing were observed by TEM when polyacrylamide as the dispersant, polyglycol and polyoxyethylene octyl phenyl ether as the wetting agent, polyvinyl pyrrolidone as the stabilizator. The compatibility was good between the nano-sized TiO₂ slurry and the MF resin, and the bond ability of the adhesive was not affected by the slurry. MF adhesive impregnated paper and veneer with nano-sized TiO₂ had an obvious antimicrobial effect. The surface decorated wood-based panels had good restrain microbe effect when the TiO₂ was 1% in MF resin. They had obvious antimicrobial effect on staphylococcus aureus and Escherichia coli.

Key words: nano-sized TiO₂, antimicrobial activity, dispersity, surface decorated wood-based panels