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Elaboration and properties of plasticised chitosan-based exfoliated nano-biocomposites
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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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Official URL: http://dx.doi.org/10.1016/j.polymer.2013.05.017
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 | ||||||||||
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| Subjects: | T Technology > TP Chemical technology | ||||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > 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: |
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| 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: |
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