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Improved thermo-mechanical properties by the addition of natural fibres in starch-based sustainable biocomposites
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.ORCID iD: 0000-0003-3572-7798
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.ORCID iD: 0000-0002-5394-7850
2011 (English)In: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, E-ISSN 1878-5840, Vol. 42, no 1, 30-40 p.Article in journal (Refereed) Published
Abstract [en]

Sustainable biocomposites based on thermoplastic starch copolymers (Mater-Bi KE03B1) and biofibres (cotton, hemp and kenaf) were prepared and characterised in terms of their thermo-mechanical and morphological properties. Biocomposites exhibit improved thermal stability and mechanical properties in comparison with the Mater-Bi KE. Biofibres act as suitable thermal stabilizers for the Mater-Bi KE, by increasing the maximum decomposition temperature and the Ea associated to the thermal decomposition process. Biofibre addition into the Mater-Bi KE results in higher storage modulus and in a reduction of the free-volume-parameter associated to the Mater-Bi KE glass transition. The influence of different biofibres on the thermo-mechanical properties of the biocomposites has been discussed. Hemp and kenaf enhance the thermal stability and reduce the free volume-parameter of Mater-Bi KE more significantly than cotton fibres, although the latter exhibits the highest mechanical performance. These differences may be explained by the improved interaction of lignocellulosic fibres with the Mater-Bi KE, due to the presence of hemicellulose and lignin in their formulation.

Place, publisher, year, edition, pages
2011. Vol. 42, no 1, 30-40 p.
Keyword [en]
Polymer-matrix composites (PMCs), Electron microscopy, Thermomechanical, Thermal analysis
National Category
Polymer Chemistry Materials Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-29537DOI: 10.1016/j.compositesa.2010.10.001ISI: 000285902300005Scopus ID: 2-s2.0-78650223590OAI: oai:DiVA.org:kth-29537DiVA: diva2:395429
Note
QC 20110207Available from: 2011-02-07 Created: 2011-02-07 Last updated: 2017-12-11Bibliographically approved

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Vilaplana, FranciscoKarlsson, Sigbritt

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