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

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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.

Item Type:	Journal Article
Subjects:	T Technology > TP Chemical technology
Divisions:	Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH):	Chitosan, Montmorillonite , Nanocomposites (Materials)
Journal or Publication Title:	Polymer
Publisher:	Elsevier Science BV
ISSN:	0032-3861
Official Date:	21 June 2013
Dates:	Date Event 21 June 2013 Published 14 May 2013 Available 6 May 2013 Accepted 16 January 2013 Submitted
Date of first compliant deposit:	6 March 2019
Volume:	54
Number:	14
Page Range:	pp. 3654-3662
DOI:	10.1016/j.polymer.2013.05.017
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
RIOXX Funder/Project Grant:	Project/Grant ID RIOXX Funder Name Funder ID UNSPECIFIED Australian Academy of Science http://dx.doi.org/10.13039/501100000969 UNSPECIFIED University of Queensland http://dx.doi.org/10.13039/501100001794

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