Chen, Pei, Xie, Fengwei, Tang, Fengzai and McNally, Tony (2020) Ionic liquid (1-ethyl-3-methylimidazolium acetate) plasticization of chitosan-based bionanocomposites. ACS Omega . doi:10.1021/acsomega.0c02418 (In Press)

Preview

PDF WRAP-ionic liquid-(1-ethyl-3-methylimidazolium acetate)-plasticization-chitosan-based-bionanocomposites-McNally-2020.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (4Mb) | Preview

Request Changes to record.

Abstract

The structure and properties of different biopolymer composites based on chitosan and chitosan/carboxymethyl cellulose (CMC) are governed by multiple structure–property relationships associated with different phase interactions. Plasticization of these matrices with ionic liquid 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc]) played a dominant role, increasing the mobility of biopolymer chains as well as ions and associated dipoles but reducing biopolymer chain interactions, crystallinity, and thermal stability. These structural changes led to higher matrix ionic conductivity, shorter electrical relaxation time, and greater matrix ductility. The inclusion of graphene oxide (GO) and reduced GO (rGO) also influenced the structure and properties of these bionanocomposites by disrupting the biopolymer hydrogen bonding and/or polyelectrolyte complexation (PEC) and interacting with [C2mim][OAc]. The impact of GO/rGO was more evident for 20 wt % [C2mim][OAc], such as increased crystallinity and thermal stability of chitosan. PEC was hindered with excess (40 wt %) [C2mim][OAc] added and further hindered again when rGO was included. This study shows that the structure and properties of bionanocomposites are not just determined by the surface chemistry of GO/rGO but can also be influenced by multiple interactions involving plasticizers such as ILs and additional biopolymers.

Item Type:	Journal Article
Subjects:	Q Science > QP Physiology
Divisions:	Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH):	Biopolymers, Nanostructured materials, Carbon, Polymers -- Thermal properties
Journal or Publication Title:	ACS Omega
Publisher:	American Chemical Society
ISSN:	2470-1343
Official Date:	22 July 2020
Dates:	Date Event 22 July 2020 Available 8 July 2020 Accepted
Date of first compliant deposit:	23 July 2020
DOI:	10.1021/acsomega.0c02418
Status:	Peer Reviewed
Publication Status:	In Press
Access rights to Published version:	Open Access
RIOXX Funder/Project Grant:	Project/Grant ID RIOXX Funder Name Funder ID 798225 H2020 European Research Council http://dx.doi.org/10.13039/100010663 UNSPECIFIED China Scholarship Council http://dx.doi.org/10.13039/501100004543 GXPSMM18ZD-02 Guangxi University for Nationalities http://dx.doi.org/10.13039/501100004703
Related URLs:	Publisher

Request changes or add full text files to a record

Repository staff actions (login required)

View Item

Downloads