Liu, Peng, Ma, Cong, Li, Ying, Wang, Liming, Wei, Linjie, Yan, Yinlei and Xie, Fengwei (2020) Facile preparation of eco-friendly, flexible starch-based materials with ionic conductivity and strain-responsiveness. ACS Sustainable Chemistry & Engineering, 8 . pp. 19117-19128. 51. doi:10.1021/acssuschemeng.0c07473 ISSN 2168-0485.

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Abstract

This work demonstrates a facile and “green” method to prepare eco-friendly, flexible, transparent, and ionically conductive starch-based materials, which have great potential for personal health-monitoring applications such as disposable electrodes. This method relies on the use of the CaCl2 solution and enables both the efficient disorganization and amorphization of high-amylose starch granules with low energy consumption and the reinforcement of the starch chain network by starch–metal cation complexation. Specifically, the method involves a simple mixing of a high-amylose starch with the CaCl2 solution followed by heating the mixture at 80 °C for 5 min. The whole process is completely environmentally benign, without any waste liquid or bioproducts generated. These resulting materials displayed tunable mechanical strength (500–1300 kPa), elongation at break (15–32%), Young’s modulus (4–9 MPa), toughness (0.05–0.26 MJ/m3), and suitable electrical resistivity (3.7–9.2 Ω·m). Moreover, the developed materials were responsive to external stimuli such as strain and liquids, satisfying the requirements for wearable sensor applications. Besides, composed of only starch, CaCl2, and water, the materials are much cheaper and eco-friendly (can be consumed by fish) compared with other polymer-based conductive hydrogels.

Item Type:	Journal Article
Subjects:	Q Science > QP Physiology T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology T Technology > TS Manufactures
Divisions:	Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH):	Starch , Starch industry, Composite materials -- Environmental aspects, Green products , Biopolymers
Journal or Publication Title:	ACS Sustainable Chemistry & Engineering
Publisher:	American Chemical Society
ISSN:	2168-0485
Official Date:	18 December 2020
Dates:	Date Event 18 December 2020 Published 2 December 2020 Accepted
Volume:	8
Page Range:	pp. 19117-19128
Article Number:	51
DOI:	10.1021/acssuschemeng.0c07473
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 Sustainable Chemistry & Engineering, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acssuschemeng.0c07473
Access rights to Published version:	Restricted or Subscription Access
Copyright Holders:	Copyright © 2020 American Chemical Society
Date of first compliant deposit:	22 December 2020
Date of first compliant Open Access:	18 December 2021
RIOXX Funder/Project Grant:	Project/Grant ID RIOXX Funder Name Funder ID 2018A0303130048 Natural Science Foundation of Guangdong Province http://dx.doi.org/10.13039/501100003453 pdjh2020b0466 Administration of Quality and Technology Supervision of Guangdong Province http://dx.doi.org/10.13039/501100009003 798225 Horizon 2020 Framework Programme http://dx.doi.org/10.13039/100010661 GXPSMM18ZD-02 Guangxi University for Nationalities http://dx.doi.org/10.13039/501100004703

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