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Reactivity of long chain alkylamines to lignin moieties: Implications on hydrophobicity of lignocellulose materials

Paper ID Volume ID Publish Year Pages File Format Full-Text
24179 43503 2010 7 PDF Available
Title
Reactivity of long chain alkylamines to lignin moieties: Implications on hydrophobicity of lignocellulose materials
Abstract

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 β-guaiacyl ether, guaiacylglycerol β-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.

Keywords
Alkylamines; Laccase; Lignocellulose hydrophobicity
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Reactivity of long chain alkylamines to lignin moieties: Implications on hydrophobicity of lignocellulose materials
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 149, Issues 1–2, 20 August 2010, Pages 81–87
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us