Title: Feasibility of nanozinc oxide as a wood preservative
Author: Clausen, Carol A.; Yang, Vina W.; Arango, Rachel A.; Green, Frederick
Source: Proceedings, one hundred fifth annual meeting of the American Wood Protection Association ... San Antonio, TX, April 19-21, 2009 : volume 105. Birmingham, AL: American Wood Protection Association, c2009: p. 255-260.
Description: Nanometals have the potential to affect the field of wood preservation through the development of new and improved biocides with unique properties. A preliminary study on nanometals suggested that 1 % nanozinc oxide was leach resistance, caused moderate termite mortality, inhibition of termite feeding and inhibition of decay by Trametes versicolor. In this study, Southern yellow pine and yellow poplar vacuum-treated with 2.5% and 5.0% nanoZnO were evaluated for leaching, mold and decay inhibition, termite resistance, and visible signs of weathering. Virtually no leaching occurred at any treatment concentration of nanozinc oxide. All concentrations of nanoZnO showed inhibition of termite feeding, (i.e. low mass losses) and 31%-35% mortality. Only the highest concentration of nanoZnO resulted in moderate inhibition of mold growth (20-32% coverage). Decay inhibition was variable. NanoZnO did not inhibit brown-rot test fungi as well as soluble ZnSO4, Weight loss for the white-rot fungus was inhibited by all concentrations of nanoZnO tested. Specimens treated with nanoZnO demonstrated UV protection after 8 weeks of weathering. Overall, nanoZnO has desirable wood protection properties, namely leach resistance, UV protection and termite resistance, but would not provide adequate protection against decay or mold as a stand alone treatment.
Keywords: Nanozinc, nanometals, decay, wood preservation, mold, termite, weathering, zinc oxide, nanoparticles, nanostructured materials, nanotechnology, metallic oxides, deterioration, wood preservatives, testing, preservative treated wood, molds, fungi, mold prevention, preserved wood, Trametes versicolor, insecticides, insect pests, insect control, biodegradation, wood-decaying fungi, leaching, ultraviolet radiation, zinc sulfate, Liriodendron tulipifera, preservatives, yellow-poplar, treated wood, nanozinc oxide, nanometals, biocides, decay fungi, wood decay, southern yellow pine, resistance to decay, termite control
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Clausen, Carol A.; Yang, Vina W.; Arango, Rachel A.; Green, Frederick. 2009. Feasibility of nanozinc oxide as a wood preservative. Proceedings, 105th annual meeting of the American Wood Protection Association, San Antonio, TX. 2009 April 19-21. Birmingham, AL: American Wood Protection Association. 105: 255-260.
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