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Title
Enzymatic processing of lignin in the production of lignocellulosic composites
Authors
Jolanta Batog and Alojzy Przepiera
Received
June 1, 2011
Published
Volume 45 Issue 7-8 September-October
Keywords
laccase, lignin, lignocellulosic composites
Abstract
A lot of attention is paid to the utilization of the chemical activity of lignocellulosic materials for creating a natural bonding force inside them. The oxidizing enzymes, i.e. laccase and peroxidase, can be used for bonding lignocellulosic materials by oxidation of phenol compounds – especially lignin. The study on obtaining board composites using raw materials (flax, hemp), laccase enzyme and its mediators (ABTS, HBT, NHA) was conducted at the Institute of Natural Fibres & Medicinal Plants (INF&MP). The results obtained showed that the board composites bonded by laccase have better strength than in the absence of laccase, and also that the application of laccase mediators improves the enzymatic oxidation of lignin. The study, aimed at obtaining boards after the activation process by laccase, on using urea-formaldehyde resin, created/evidenced the possibility of a significant reduction in the use of synthetic bonding agents for manufacturing board composites. Bonding of lignocellulosic composites by oxidizing enzymes has a positive effect on the environment.
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