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Kudanga, T; Prasetyo, EN; Sipilä, J; Guebitz, GM; Nyanhongo, GS.
(2010): Reactivity of long chain alkylamines to lignin moieties: implications on hydrophobicity of lignocellulose materials.
J Biotechnol. 2010; 149(1-2):81-87 FullText FullText_BOKU

Enzymatic processes provide new perspectives for modification of lignocellulose materials. In the current study, laccase catalyzed coupling of long chain alkylamines to lignin model molecules and lignocellulose was investigated. Up to two molecules of dodecylamine (DA) and dihexylamine (DHA) were successfully coupled with lignin monomers (guaiacol, catechol and ferulic acid) while coupling onto complex lignin model compounds (syringylglycerol beta-guaiacyl ether, guaiacylglycerol beta-guaiacyl ether and dibenzodioxocin) yielded 1:1 coupling products. Surface analysis of beech veneers enzymatically grafted with DA showed an increase in nitrogen content of 3.18% compared to 0.71% in laccase only treated controls while the O/C ratio decreased from 0.52 to 0.46. Concomitantly the grafting of DHA or DA onto beech veneers resulted in a 53.8% and 84.2% increase in hydrophobicity, respectively when compared to simple adsorption. Therefore, laccase-mediated grafting of long chain alkylamines onto lignocellulose materials can be potentially exploited for improving their hydrophobicity. (C) 2010 Elsevier B.V. All rights reserved.
Authors BOKU Wien:
Gübitz Georg
Nyanhongo Gibson Stephen
Find related publications in this database (using NML MeSH Indexing)
Amines - chemistry
Chromatography, High Pressure Liquid -
Hydrophobic and Hydrophilic Interactions -
Laccase - metabolism
Lignin - chemistry
Mass Spectrometry -
Photoelectron Spectroscopy -

Find related publications in this database (Keywords)
Lignocellulose hydrophobicity

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