Wood, Benjamin M., Coles, Stuart R., Maggs, Steven J., Meredith, James O. and Kirwan, Kerry (2011) Use of lignin as a compatibiliser in hemp/epoxy composites. Composites Science and Technology, Vol.71 (No.16). pp. 1804-1810. doi:10.1016/j.compscitech.2011.06.005

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Abstract

This study was designed to ascertain if the addition of lignin to hemp-epoxy composites was beneficial to their mechanical properties. Composites were made using a VARTM method with a two-part epoxy resin and a non-woven hemp fibre mat. Lignin was added to the resin before infusion at concentrations varying between 0 and 10% w/w. Samples were then tested according to the relevant ISO standards. There was an increase in impact properties of the fabricated composites with the energy absorbed by the composite containing 5% w/w lignin being 145% higher than the composite with no lignin added. Both flexural and tensile modulus showed an increase when lignin was added up to 2.5% w/w, although there was a drop in both when the lignin was increased to 5% w/w, attributed to poor mixing and infusion due to the increased viscosity of the resin. In all cases, the addition of lignin increased the structural properties of the composites to some degree when compared with composites with no additional lignin. (C) 2011 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology T Technology > TS Manufactures
Divisions:	Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Journal or Publication Title:	Composites Science and Technology
Publisher:	Pergamon
ISSN:	0266-3538
Official Date:	14 November 2011
Dates:	Date Event 14 November 2011 Published
Volume:	Vol.71
Number:	No.16
Number of Pages:	7
Page Range:	pp. 1804-1810
DOI:	10.1016/j.compscitech.2011.06.005
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Warwick Innovative Manufacturing Research Centre (WIMRC)
Version or Related Resource:	This item was also presented at the 16th International Conference on Composite Structures, Faculty of Engineering (FEUP), University of Porto, Portugal, June 28-30, 2011. Edited by A.J.M. Ferreira.

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