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Graphene oxide enhanced ionic liquid plasticisation of chitosan/alginate bionanocomposites

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Chen, Pei, Xie, Fengwei, Tang, Fengzai and McNally, Tony (2021) Graphene oxide enhanced ionic liquid plasticisation of chitosan/alginate bionanocomposites. Carbohydrate Polymers, 253 . 117231. doi:10.1016/j.carbpol.2020.117231

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Official URL: https://doi.org/10.1016/j.carbpol.2020.117231

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Abstract

This study reports that the effect of graphene oxide (GO) or reduced GO (rGO) on the structure and properties of polyelectrolyte-complexed chitosan/alginate bionanocomposites is highly dependent on plasticiser type (glycerol or 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc])) due to the competing interactions between the components. For the glycerol-plasticised chitosan/alginate matrix, inclusion of GO/rGO enhanced the chitosan crystallinity and increased matrix ductility. While the chitosan/alginate matrix plasticised by [C2mim][OAc] showed dramatically weakened interactions between the two biopolymers, GO was highly effective at counteracting the effect of [C2mim][OAc] by interacting with the biopolymers and the ionic liquid ions, resulting in enhanced mechanical properties and decreased surface hydrophilicity. Compared with GO, rGO was much less effective at promoting chitosan–alginate interactions and even resulted in higher surface hydrophilicity. However, irrespective of the plasticiser type, inclusion of rGO resulted in reduced crystallinity by restricting the interactions between [C2mim][OAc] and the biopolymers, and higher ionic conductivity.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
SWORD Depositor: Library Publications Router
Library of Congress Subject Headings (LCSH): Graphene, Graphene -- Oxidation, Polysaccharides -- Structure, Chitosan, Polyelectrolytes
Journal or Publication Title: Carbohydrate Polymers
Publisher: Elsevier
ISSN: 0144-8617
Official Date: 1 February 2021
Dates:
DateEvent
1 February 2021Published
16 October 2020Available
9 October 2020Accepted
Date of first compliant deposit: 28 October 2020
Volume: 253
Article Number: 117231
DOI: 10.1016/j.carbpol.2020.117231
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
798225Horizon 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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