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Comparison of traditional field retting and Phlebia radiata Cel 26 retting of hemp fibres for fibre-reinforced composites

Liu, Ming and Ale, Marcel Tutor and Kołaczkowski, Bartłomiej and Fernando, Dinesh and Daniel, Geoffrey and Meyer, Anne S and Thygesen, Anders (2017). Comparison of traditional field retting and Phlebia radiata Cel 26 retting of hemp fibres for fibre-reinforced composites. AMB Express. 7:58, 1-15
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Official URL: http://dx.doi.org/10.1186/s13568-017-0355-8

Abstract

Classical field retting and controlled fungal retting of hemp using Phlebia radiata Cel 26 (a mutant with low cellulose degrading ability) were compared with pure pectinase reatment with regard to mechanical properties of the produced fibre/epoxy composites. For field retting a classification of the microbial evolution (by gene sequencing) and enzyme profiles were conducted. By phylogenetic frequency mapping, different types of fungi, many belonging to the Ascomycota phylum were found on the fibres during the first 2 weeks of field retting, and thereafter, different types of bacteria, notably Proteobacteria, also proliferated on the field retted fibres. Extracts from field retted fibres exhibited high glucanase activities, while extracts from P. radiata Cel 26 retted fibres showed high polygalacturonase and laccase activities. As a result, fungal retting gave a significantly higher glucan content in the fibres than field retting (77 vs. 67%) and caused a higher removal of pectin as indicated by lower galacturonan content of fibres (1.6%) after fibres were retted for 20 days with P. radiata Cel 26 compared to a galacturonan content of 3.6% for field retted fibres. Effective fibre stiffness increased slightly after retting with P. radiata Cel 26 from 65 to 67 GPa, while it decreased after field retting to 52 GPa. Effective fibre strength could not be determined similarly due to variations in fibre fracture strain and fibre-matrix adhesion. A maximum composite strength with 50 vol% fibres of 307 MPa was obtained using P. radiata Cel 26 compared to 248 MPa with field retting.

Authors/Creators:Liu, Ming and Ale, Marcel Tutor and Kołaczkowski, Bartłomiej and Fernando, Dinesh and Daniel, Geoffrey and Meyer, Anne S and Thygesen, Anders
Title:Comparison of traditional field retting and Phlebia radiata Cel 26 retting of hemp fibres for fibre-reinforced composites
Series/Journal:AMB Express (2191-0855)
Year of publishing :2017
Volume:7
Number:58
Page range:1-15
Number of Pages:15
Publisher:Springer Verlag
ISSN:2191-0855
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:K Forestry > K01 Forestry - General aspects
Subjects:(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 205 Materials Engineering > Composite Science and Engineering
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Wood Science
Keywords:Hemp fibre, Field retting, Phlebia radiata Cel 26, Microbial community, Enzyme profiling, Composite strength
URN:NBN:urn:nbn:se:slu:epsilon-e-4587
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-4587
Additional ID:
Type of IDID
Web of Science (WoS)000395981100002
ID Code:14833
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Products
Deposited By: SLUpub Connector
Deposited On:22 Dec 2017 07:09
Metadata Last Modified:22 Dec 2017 07:09

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