Exploring durability of interfaces in flax fibre/epoxy micro-composites

Type Article
Date 2013-05
Language English
Author(s) Le Duigou Antoine1, Davies PeterORCID2, Baley Christophe1
Affiliation(s) 1 : LIMATB Lab Ingn Mat Bretagne, Equipe Polymeres & Composites, F-56321 Lorient, France.
2 : IFREMER Mat & Struct Grp, F-29280 Plouzane, France.
Source Composites Part A-applied Science And Manufacturing (1359-835X) (Elsevier Sci Ltd), 2013-05 , Vol. 48 , P. 121-128
DOI 10.1016/j.compositesa.2013.01.010
WOS© Times Cited 27
Keyword(s) Flax fibres, Environmental degradation, Fibre/matrix bond
Abstract The influence of wet aging on the behaviour of flax/epoxy micro-composites composed of single flax fibres embedded in epoxy micro-droplets has been studied. Interfacial shear strength has been examined by debonding the micro-droplets. The apparent interfacial shear strength decreases with immersion time in water, dropping rapidly during the first 15 min of immersion then stabilizing. Drying samples after short immersion periods allows recovery of properties, indicating a plasticization mechanism. For longer immersion times irreversible degradation is observed. Scanning electron microscopy reveals fibre surface peeling, indicating that an internal interface within the fibre is weaker than the fibre/matrix interface after aging. A simple descriptive model has been used to identify diffusion kinetics, with a critical diffusion time corresponding to a change in degradation mechanism. (C) 2013 Elsevier Ltd. All rights reserved.
Full Text
File Pages Size Access
8 872 KB Access on demand
Author's final draft 16 592 KB Open access
Top of the page