Weatherability and Leach Resistance of Wood Impregnated with Nano-Zinc Oxide

Weatherability and Leach Resistance of Wood Impregnated with Nano-Zinc Oxide

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Abstract Southern pine specimens vacuum-treated with nano-zinc oxide (nano-ZnO) dispersions were evaluated for leach resistance and UV protection.Virtually, no leaching occurred in any of the nano-ZnO–treated specimens in a laboratory leach test, even at the highest retention of 13 kg/m3.However, specimens treated with high concentrations of nano-ZnO showed 58–65% chemical depletion after 12 months of outdoor exposure.

Protection from UV damage after bbs-dog-collar- 12 months exposure is visibly obvious on both exposed and unexposed surfaces compared to untreated controls.Graying was markedly diminished, although checking occurred in all specimens.Nano-zinc oxide Car Diffuser treatment at a concentration of 2.

5% or greater provided substantial resistance to water absorption following 12 months of outdoor exposure compared to untreated and unweathered southern pine.We conclude that nano-zinc oxide can be utilized in new wood preservative formulations to impart resistance to leaching, water absorption and UV damage of wood.