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Ionic liquid-plasticised composites of chitosan and hybrid 1D and 2D nanofillers
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Chen, Pei, Xie, Fengwei, Tang, Fengzai and McNally, Tony (2021) Ionic liquid-plasticised composites of chitosan and hybrid 1D and 2D nanofillers. Functional Composite Materials, 2 . 14. doi:10.1186/s42252-021-00026-0
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Official URL: https://doi.org/10.1186/s42252-021-00026-0
Abstract
The focus of this research was to study the effect of combining nanofillers with different geometry and surface chemistry on the structure and properties of biopolymers as an alternative to traditional plastics. How the inclusion of 2D graphene oxide (GO) or reduced GO (rGO) combined with 1D sepiolite (SPT) or cellulose nanocrystals (CNCs) affect the structure and properties of chitosan and chitosan/carboxymethyl cellulose (CMC) materials was investigated. A 3D interconnected microstructure formed, composed of GO and SPT due to the strong interactions between these hydrophilic nanofillers. The chitosan/CMC/GO/SPT composite had the highest tensile strength (77.5 ± 1.2 MPa) and Young’s modulus (1925.9 ± 120.7 MPa). For the un-plasticised matrices, hydrophobic rGO nanosheets generally hindered the interaction of SPT or CNCs with the polysaccharides (chitosan and CMC) and consequently, composite properties were mainly determined by the rGO. However, for the chitosan matrix plasticised by 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc]), rGO + CNCs or rGO + SPT disrupted polymer chain interactions more effectively than the nanofillers when added alone and resulted in the chitosan being more plasticised, as shown by increased chain mobility, ductility, and surface hydrophilicity. For the [C2mim][OAc]-plasticised chitosan/CMC matrix, the advantages of including hybrid fillers, rGO + CNCs or rGO + SPT, were also obtained, resulting in higher thermal stability and surface hydrophobicity.
| Item Type: | Journal Article | ||||||
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| Subjects: | Q Science > QD Chemistry Q Science > QK Botany Q Science > QP Physiology T Technology > TA Engineering (General). Civil engineering (General) T Technology > TN Mining engineering. Metallurgy T Technology > TP Chemical technology |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||
| Library of Congress Subject Headings (LCSH): | Biopolymers, Nanocomposites (Materials), Polysaccharides , Polysaccharides -- Synthesis, Polysaccharides -- Biotechnology, Graphene -- Oxidation, Meerschaum , Cellulose nanocrystals, Ionic solutions | ||||||
| Journal or Publication Title: | Functional Composite Materials | ||||||
| Publisher: | SpringerOpen | ||||||
| ISSN: | 2522-5774 | ||||||
| Official Date: | 26 September 2021 | ||||||
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| Volume: | 2 | ||||||
| Article Number: | 14 | ||||||
| DOI: | 10.1186/s42252-021-00026-0 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Open Access | ||||||
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