Elaboration and properties of plasticised chitosan-based exfoliated nano-biocomposites

Xie, David Fengwei, Martino, Veronica P., Sangwan, Parveen, Way, Cameron, Cash, Gregory A., Pollet, Eric, Dean, Katherine M., Halley, Peter J. and Averous, Luc (2013) Elaboration and properties of plasticised chitosan-based exfoliated nano-biocomposites. Polymer, 54 14: 3654-3662. doi:10.1016/j.polymer.2013.05.017

Author Xie, David Fengwei
Martino, Veronica P.
Sangwan, Parveen
Way, Cameron
Cash, Gregory A.
Pollet, Eric
Dean, Katherine M.
Halley, Peter J.
Averous, Luc
Title Elaboration and properties of plasticised chitosan-based exfoliated nano-biocomposites
Journal name Polymer   Check publisher's open access policy
ISSN 0032-3861
Publication date 2013-06-21
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.polymer.2013.05.017
Volume 54
Issue 14
Start page 3654
End page 3662
Total pages 9
Place of publication London, United Kingdom
Publisher Elsevier
Language eng
Formatted abstract
A series of plasticised chitosan-based materials and nanocomposites were successfully prepared by thermomechanical kneading. During the processing, the montmorillonite (MMT) platelets were fully delaminated. The nanoclay type and content and the preparation method were seen to have an impact on the crystallinity, morphology, glass transition temperature, and mechanical properties of the samples. When higher content (5%) of MMT–Na+ or either content (2.5% or 5%) of chitosan organomodified MMT (OMMT–Ch) was used, increases in crystallinity and glass transition temperature were observed. Compared to the neat chitosan, the plasticised chitosan-based nano-biocomposites showed drastically improved mechanical properties, which can be ascribed to the excellent dispersion and exfoliation of nanoclay and the strong affinity between the nanoclay and the chitosan matrix. The best mechanical properties obtained were Young's modulus of 164.3 MPa, tensile strength of 13.9 MPa, elongation at break of 62.1%, and energy at break of 0.671 MPa. While the degree of biodegradation was obviously increased by the presence of glycerol, a further increase might be observed especially by the addition of unmodified nanoclay. This could surprisingly contribute to full (100%) biodegradation after 160 days despite the well-known antimicrobial property of chitosan. The results in this study demonstrate the great potential of plasticised chitosan-based nano-biocomposites in applications such as e.g., biodegradable packaging materials.
Keyword Chitosan
Nanohydroxyapatite composite scaffolds
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

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Created: Sat, 10 Aug 2013, 05:11:06 EST by System User on behalf of Aust Institute for Bioengineering & Nanotechnology