Nanotechnology applications have potential for improving decay resistance of wood under tropical conditions. In this work, nine commercial timbers from Costa Rica were treated with silver nanoparticles synthetized with NPsAg-ethylene glycol through pressure. White-rot (Trametes versicolor)
and brown-rot (Lenzites acuta) fungi were tested. According to the results, the sizes of the synthetized silver nanoparticles were 40 to 100 nm. The retention achieved was of 16 to 112 mg of silver per kilogram of wood or 7.7 to 25.1 g of silver per cubic meter of wood. Specific gravity
affected the retention in Cordia alliodora, Gmelina arborea, Goethalsia meiantha, Tectona grandis and Vochysia ferruginea. Loss of weight was less in wood treated with silver nanoparticles, its values ranging from 8% to 35% in L. acuta and 7% to 11% in T. versicolor.
As for durability, the wood of the species treated with silver nanoparticles is classified as highly resistant to T. versicolor and moderately to moderately resistant to L. acuta. Moreover, the effect of retention of the nanoparticles was not significant for weight in all of
the species. This parameter was positively affected in C. odorata, E. cyclocarpum, G. arborea, T. grandis and V. ferruginea, although unaffected for other species.
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Document Type: Research Article
Escuela de Ingeniería Forestal, Instituto Tecnológico de Costa Rica, Apartado 159-7050, Cartago, Costa Rica
Laboratório Nacional Nanotecnologia (LANOTEC), Centro Nacional de Alta Tecnologia-CENAT, San Jose, Apartado 1174-1200, Costa Rica
Publication date: August 1, 2017
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Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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