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Glycerol plasticisation of chitosan/carboxymethyl cellulose composites : role of interactions in determining structure and properties

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Chen, Pei, Xie, Fengwei, Tang, Fengzai and McNally, Tony (2020) Glycerol plasticisation of chitosan/carboxymethyl cellulose composites : role of interactions in determining structure and properties. International Journal of Biological Macromolecules, 163 . pp. 683-693. doi:10.1016/j.ijbiomac.2020.07.004

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Official URL: http://dx.doi.org/10.1016/j.ijbiomac.2020.07.004

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Abstract

Biopolymers such as chitosan and cellulose continue to attract much interest as they have many appealing characteristics such as biodegradability, biocompatibility, chemical versatility and natural functionality; however, many of their properties usually require further tailoring for specific purposes. This study shows that glycerol plasticisation and the addition of graphene oxide (GO) or reduced graphene oxide (rGO) altered the properties of chitosan and a chitosan/carboxymethyl cellulose (CMC) blend. For the chitosan/CMC matrix, GO or rGO was likely to disrupt polyelectrolyte complexation (PEC) between the two biopolymers, leading to weakened mechanical properties and increased surface hydrophilicity. Conversely, glycerol assisted PEC by increasing the biopolymer chain mobility, leading to reduced surface hydrophilicity. Moreover, some synergistic effects from a combination of glycerol and GO/rGO were evident. Specifically, GO/rGO notably increased the toughness of the chitosan film on inclusion of 40 wt% glycerol. Both GO and rGO reduced the relaxation temperatures of the chitosan/CMC film with 20 wt% glycerol added, resulting in increased biopolymer chain mobility. Moreover, the bionanocomposites showed high relative permittivity (54–387). Thus, this work describes how complex interactions in multiphasic biopolymer composite systems influence structure and properties.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
T Technology > TP Chemical technology
Divisions: Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Biopolymers, Cellulose -- Chemistry, Graphene, Graphene -- Oxidation, Polysaccharides, Chitosan -- Biotechnology
Journal or Publication Title: International Journal of Biological Macromolecules
Publisher: Elsevier
ISSN: 0141-8130
Official Date: 15 November 2020
Dates:
DateEvent
15 November 2020Published
6 July 2020Available
1 July 2020Accepted
Date of first compliant deposit: 9 July 2020
Volume: 163
Page Range: pp. 683-693
DOI: 10.1016/j.ijbiomac.2020.07.004
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
798225[ERC] Horizon 2020 Framework Programmehttp://dx.doi.org/10.13039/100010661
UNSPECIFIEDChina Scholarship Councilhttp://dx.doi.org/10.13039/501100004543
GXPSMM18ZD -02Guangxi University for Nationalitieshttp://dx.doi.org/10.13039/501100004703

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