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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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WRAP-Graphene-oxide-enhanced-ionic-liquid-plasticisation-chitosan-Xie-2020.pdf - Accepted Version - Requires a PDF viewer. Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0. Download (1829Kb) | Preview |
Official URL: https://doi.org/10.1016/j.carbpol.2020.117231
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 | ||||||||||||
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| Subjects: | Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General) |
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| 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: |
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| 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: |
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