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Unexpected plasticization effects on the structure and properties of polyelectrolyte complexed chitosan/alginate materials
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Chen, Pei, Xie, Fengwei, Tang, Fengzai and McNally, Tony (2020) Unexpected plasticization effects on the structure and properties of polyelectrolyte complexed chitosan/alginate materials. ACS Applied Polymer Materials, 2 (7). pp. 2957-2966. doi:10.1021/acsapm.0c00433 ISSN 2637-6105.
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WRAP-unexpected-plasticization-effects-structure-properties-polyelectrolyte-complexed-chitosan-alginate-materials-McNally-2020.pdf - Accepted Version - Requires a PDF viewer. Download (3015Kb) | Preview |
Official URL: http://dx.doi.org/10.1021/acsapm.0c00433
Abstract
This work describes the effects of different plasticizers, namely glycerol, triacetin, and 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc]), on the structure and properties of thermomechanically-processed, bulk chitosan and chitosan/alginate materials. Mechanical data shows that, for the chitosan matrix, glycerol and [C2mim][OAc] were highly effective at reducing intra- and intermolecular forces between biopolymer chains, leading to increased ductility, while the plasticization effect of triacetin was minor. Nonetheless, this triester effectively suppressed biopolymer re-crystallization whereas [C2mim][OAc] promoted it. In contrast, for the chitosan/alginate matrix, inclusion of triacetin resulted in more re-crystallization, higher thermal stability, and excellent mechanical properties. The triacetin assisted the interactions between biopolymer chains in this polyelectrolyte complexed system. In contrast, the chitosan/alginate material plasticized by [C2mim][OAc] displayed the most apparent phase separation, weakest mechanical properties, and highest surface hydrophilicity, behavior associated with the disruption of polyelectrolyte complexation and hydrogen bonding between biopolymer chains. Interestingly, the formation of a “new structure” under the electron beam during microscopy imaging was observed, likely from coordination between alginate and [C2mim][OAc]. Thus, this work has revealed the strong and unexpected effects of three different plasticizers on the hydrogen bonding and electrostatic interactions within chitosan/alginate polyelectrolyte complexed materials, which have potential for biomedical applications where balanced hydrophilicity and mechanical properties are required.
| Item Type: | Journal Article | |||||||||
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| Subjects: | Q Science > QD Chemistry Q Science > QK Botany Q Science > QP Physiology 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): | Polysaccharides, Polysaccharides -- Synthesis, Metals -- Thermomechanical treatment, Plasticizers, Polyelectrolytes, Biopolymers | |||||||||
| Journal or Publication Title: | ACS Applied Polymer Materials | |||||||||
| Publisher: | American Chemical Society | |||||||||
| ISSN: | 2637-6105 | |||||||||
| Official Date: | 17 June 2020 | |||||||||
| Dates: |
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| Volume: | 2 | |||||||||
| Number: | 7 | |||||||||
| Page Range: | pp. 2957-2966 | |||||||||
| DOI: | 10.1021/acsapm.0c00433 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Reuse Statement (publisher, data, author rights): | This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Polymer Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acsapm.0c00433 | |||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||
| Date of first compliant deposit: | 22 June 2020 | |||||||||
| Date of first compliant Open Access: | 17 June 2021 | |||||||||
| RIOXX Funder/Project Grant: |
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