Dean, Katherine, Sangwan, Parveen, Way, Cameron, Zhang, Xiaoqing, Martino, Verónica P., Xie, Fengwei, Halley, Peter J., Pollet, Eric and Avérous, Luc (2013) Glycerol plasticised chitosan : a study of biodegradation via carbon dioxide evolution and nuclear magnetic resonance. Polymer Degradation and Stability, 98 (6). pp. 1236-1246. doi:10.1016/j.polymdegradstab.2013.03.004

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Abstract

The biodegradation of neat chitosan, glycerol plasticised chitosan films and their corresponding clay-based nano-biocomposites has been studied in simulated aerobic soil and composting environments using a respirometric method. The rate of biodegradation was much faster in soil and all test samples achieved close to 100% biodegradation within 70 days. During biodegradation under aerobic composting conditions the neat chitosan samples achieved approx 65% biodegradation and the plasticised chitosan samples achieved >85% biodegradation within 180 days. Additionally, nano-clay additives had no significant effect on the overall biodegradability of the chitosan-based materials during composting. High-resolution solid-state NMR studies were performed to examine the chemical structures of the plasticized chitosan and their nano-biocomposites. NMR studies indicated that the glycerol plasticizer was extracted into wet compost within first few days while acetic acid remained through strong hydrogen bonding with chitosan during the degradation process.

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 -- Biodegradation, Compost
Journal or Publication Title:	Polymer Degradation and Stability
Publisher:	Elsevier
ISSN:	0141-3910
Official Date:	June 2013
Dates:	Date Event June 2013 Published 19 March 2013 Available 9 March 2013 Accepted 25 January 2013 Submitted
Date of first compliant deposit:	6 March 2019
Volume:	98
Number:	6
Page Range:	pp. 1236-1246
DOI:	10.1016/j.polymdegradstab.2013.03.004
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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