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Biocomposites Produced from Hardwood Particles by Equal Channel Angular Pressing Without Additives

1
Department of Mechanical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
2
CSIRO Manufacturing, Private Bag 10, Clayton South MDC, VIC 3169, Australia
*
Authors to whom correspondence should be addressed.
J. Compos. Sci. 2019, 3(2), 36; https://doi.org/10.3390/jcs3020036
Received: 28 February 2019 / Revised: 27 March 2019 / Accepted: 30 March 2019 / Published: 3 April 2019
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Abstract

Equal channel angular pressing (ECAP) has been shown to be a promising method for producing biocomposites from wood particles. However, severe plastic deformation during ECAP would cause considerable cracking when consolidation is carried out without a binder. In this study, the processing conditions were investigated for ECAP of hardwood particles into bulk biocomposites without any additives. Crack formation and wood cell deformation were examined in conjunction with thermal stability and crystallinity of the biocomposites. In comparison with hot pressing without severe shearing, a decrease in crystallinity and severe deformation of wood cells occurred during ECAP. Improved processability and homogeneous deformation would occur at high ECAP temperature (e.g., 210 °C) or low ECAP speed (e.g., 10 mm/min), leading to reduced crack formation in the ECAP-produced biocomposites. Despite its tendency to cause periodic cracking, effective plastic deformation in the regions between cracks was shown to improve interparticle binding. Ongoing research points to the potential achievement of crack-free hardwood (HW) consolidated without a binder, leading to significantly enhanced strength. View Full-Text
Keywords: biocomposites; hardwood particles; equal channel angular pressing (ECAP); severe plastic deformation biocomposites; hardwood particles; equal channel angular pressing (ECAP); severe plastic deformation
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Bai, Y.; Zhang, X.; Xia, K. Biocomposites Produced from Hardwood Particles by Equal Channel Angular Pressing Without Additives. J. Compos. Sci. 2019, 3, 36.

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J. Compos. Sci. EISSN 2504-477X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
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