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Hemp fibres: Enzymatic effect of microbial processing on fibre bundle structure

Thygesen, Anders and Lui, Ming and Meyer, Anne S and Daniel, Geoffrey (2013). Hemp fibres: Enzymatic effect of microbial processing on fibre bundle structure. I/In: Risoe-International-Symposium-on-Materials-Science-Proceedings, 2 Sept - 5 Sept 2013, Roskilde, Denmark.
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Abstract

The effects of microbial pretreatment on hemp fibres were evaluated after microbial retting using the white rot fungi Ceriporiopsis subvermispora and Phlebia radiata Cel 26 and water retting. Based on chemical composition, P. radiata Cel 26 showed the highest selectivity for pectin and lignin degradation and lowest cellulose loss (14%) resulting in the highest cellulose content (78.4%) for the treated hemp fibres. The pectin and lignin removal after treatment with P. radiata Cel 26 were of the order 82% and 50%, respectively. Aligned epoxy-matrix composites were made from hemp fibres defibrated with the microbial retting to evaluate the effects on their ultrastructure. SEM microscopy of the composites showed low porosity on the fibre surfaces after defibration with P. radiata Cel 26 and C. subvermispora indicating good epoxy polymer impregnation. In contrast, fibres treated by water retting and the raw hemp fibres were badly impregnated due to porosity caused by surface impurities such as epidermis and other pectin rich plant cells. The pectin and lignin mainly located in the outer part of the fibres were assumed to be extracted and degraded by pectinase and peroxidase enzymes produced by the fungi.

Authors/Creators:Thygesen, Anders and Lui, Ming and Meyer, Anne S and Daniel, Geoffrey
Title:Hemp fibres: Enzymatic effect of microbial processing on fibre bundle structure
Series/Journal:Proceedings Of The Risø International Symposium On Materials Science
Year of publishing :2013
Number:34
Page range:373-380
Number of Pages:8
Place of Publication:Roskilde
Publisher:Risø National Laboratory, Roskilde
Associated Programs and Other Stakeholders:SLU - Environmental assessment > Programme Forest
ISSN:0907-0079
Language:English
Publication Type:Conference Paper (Paper)
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Wood Science
URN:NBN:urn:nbn:se:slu:epsilon-e-3066
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3066
ID Code:11389
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Products
Deposited By: SLUpub Connector
Deposited On:13 Nov 2015 14:15
Metadata Last Modified:07 Feb 2016 04:09

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