Poplar wood treated with nano-silver–copper particles: fungal degradation and leaching analysis

Author:

Wang Xiwei1,Yi Tengfei2,Luo Hongxue1,Qi Yanran1,Yao Fengbiao1,Liu Yiliang1,Li Yongfeng1

Affiliation:

1. Key Laboratory of State Forestry Administration for Silviculture of the Lower Yellow River , 34734 College of Forestry, Shandong Agricultural University , Tai’an 271018 , China

2. National Centre for Timber Durability and Design Life , University of the Sunshine Coast , Sippy Downs , QLD 4556 , Australia

Abstract

Abstract This study investigated the inhibition effect of nanoscale silver–copper particle (20 nm) against Coriolus versicolor and Gloeophyllum trabeum. Poplar wood samples (Populus L.) were vacuum-impregnated using aqueous nano-AgCu solutions at concentrations of 0.01 %, 0.02 %, 0.03 %, 0.05 %, 0.075 %, and 0.1 %. Alkaline copper quaternary (ACQ, 0.1 %), boric acid (0.2 %) and untreated control group (CK) were employed for comparisons. Decay resistance and leachability were studied. The anti-fungi effects were compared between nano-AgCu, nano-Ag, Ag+ (silver nitrate), Cu2+ (copper nitrate), and a composite of Ag+–Cu2+. Nano-AgCu particle exhibited effective resistance to fungi after 12 weeks of exposure. The threshold retention of the nano-AgCu against C. versicolor and G. trabeum on poplar wood was 0.19 kg m−3 and 0.62 kg m−3, respectively. The silver–copper nanoparticles demonstrated excellent leach resistance, and the inhibition effect was retained after leaching. The nano-AgCu particle provided better antifungal effects than single ions or metal nanoparticles. This study illustrates the potential of using nano-AgCu particle as an efficient wood preservative compared to commercial water-soluble preservatives.

Funder

Natural Science Foundation of Shandong Province

Publisher

Walter de Gruyter GmbH

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