evaluation of contact angle and leach resistance of beech wood treated with nano-zinc oxide

the objective of this research is characterizing the effect of nano-zinc oxide (nano-zno) dispersions on leach resistance and contact angle of beech wood (fagus orientalis lipsky). the beech wood was cut into standard dimension, and oven dried after treating with nano-zno solution, based on immersion method. three treating nano-zno solution levels: (o, 20000 and 40000 ppm), and two thermal treating levels: (60 and 120ºc) were selected. after conditioning, leaching tests were performed and contact angle of samples after 1 and 10 seconds were measured. the results showed that by increasing of the nano material concentration and the temperature, the contact angle increased. in tenth second, the minimum and maximum angles were 53.30º and 90.07º which observed for untreated sample and for 40000 ppm concentration and 120ºc temperatures, respectively. improving on contact angle represents the significant reduction in wettability property of surface in treated wood. results of leaching test implied that effect of increment of nano-zno concentration was negligible, while the temperature increasing resulted in nano-zno stabilization