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Title
Agents for wood bioprotection based on natural aromatic compounds and their complexes with copper and zinc
Authors
Iulian-Andrei Gilca Adina-Mirela Capraru Silvia Grama and Valentin I. Popa
Received
November 9, 2010
Published
Volume 45 Issue 3-4 March-April
Keywords
lignin, hydroxymethylation, nanoparticles, bioprotection, birch veneer
Abstract
The paper discusses the interaction between birch veneer and wheat straw lignin (L1) and Sarkanda grass lignin (L2), offered by Granit Recherche Development SA, Lausanne-Switzerland, both unmodified and modified (through a hydroxymetylation reaction which allows obtaining of nanoparticles), along with their complexes with copper and zinc. The treatments of birch veneer samples involve their successive immersion for 2 h into the products selected for testing. Solutions with 5% concentrations of lignin products in 0.1N ammonia solutions were used. The biostability of the thus treated veneer samples was assessed by burying them into soil cultivated with wheat plants and keeping them there for six months. The efficiency of the treatments was assessed by determining mass loss, contact angle and their variation during measurements.
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