Paper Title:
Improving Hygrothermal Performance in Epoxy-Biofibre Composites
  Abstract

Confocal microscopy and water diffusivity measurements were used to characterise the development of defects in biofibre-reinforced composite materials. Biofibres swelled more than the matrix when the specimen was immersed in water, but the associated distortion of the matrix rarely caused defects. The biofibres shrank faster than the matrix when the specimen was dried in air, causing debonding at the fibre-matrix interfaces and microcracks within the fibres. We started with coarse technical fibres from the leaves of harakeke (Phormium tenax), treated a portion with 1% NaOH, and pulped a portion at 170 °C. Water diffusivities for the corresponding composites increased over the first 3 wet-dry cycles, particularly for the composite made with untreated fibre, but were too small to be of concern for the composite made from pulped fibre.

  Info
Periodical
Advanced Materials Research (Volumes 29-30)
Edited by
Deliang Zhang, Kim Pickering, Brian Gabbitas, Peng Cao, Alan Langdon, Rob Torrens and Johan Verbeek
Pages
287-290
DOI
10.4028/www.scientific.net/AMR.29-30.287
Citation
R. H. Newman, A. Thumm, E.C. Clauss, M.J.L. Guen, "Improving Hygrothermal Performance in Epoxy-Biofibre Composites", Advanced Materials Research, Vols. 29-30, pp. 287-290, 2007
Online since
November 2007
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Price
$32.00
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