Facile Preparation of Eco-Friendly, Flexible Starch-Based Materials with Ionic Conductivity and Strain-Responsiveness

Peng Liu; Cong Ma; Ying Li; Liming Wang; Linjie Wei; Yinlei Yan; Fengwei Xie

doi:10.1021/acssuschemeng.0c07473

Facile Preparation of Eco-Friendly, Flexible Starch-Based Materials with Ionic Conductivity and Strain-Responsiveness

Peng Liu, Cong Ma, Ying Li, Liming Wang, Linjie Wei, Yinlei Yan, Fengwei Xie

Research output: Contribution to journal › Article › peer-review

36 Citations (SciVal)

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.

Original language	English
Pages (from-to)	19117-19128
Number of pages	12
Journal	ACS Sustainable Chemistry and Engineering
Volume	8
Issue number	51
DOIs	https://doi.org/10.1021/acssuschemeng.0c07473
Publication status	Published - 28 Dec 2020

Bibliographical note

Publisher Copyright:
© 2020 American Chemical Society.

Funding

The project was supported by the Natural Science Foundation of Guangdong Province (grant no. 2018A0303130048) and the College Students Science and Technology Innovation Fund of Guangdong Province (grant no. pdjh2020b0466). F.X. acknowledges support from the Guangxi Key Laboratory for Polysaccharide Materials and Modification Guangxi University for Nationalities, China (grant no. GXPSMM18ZD-02). The project was supported by the Natural Science Foundation of Guangdong Province (grant no. 2018A0303130048) and the College Students Science and Technology Innovation Fund of Guangdong Province (grant no. pdjh2020b0466). F.X. acknowledges support from the Guangxi Key Laboratory for Polysaccharide Materials and Modification, Guangxi University for Nationalities, China (grant no. GXPSMM18ZD-02).

Funders	Funder number
College Students Science and Technology Innovation Fund of Guangdong Province	pdjh2020b0466
Guangxi Key Laboratory for Polysaccharide Materials and Modification
Guangxi Key Laboratory for Polysaccharide Materials and Modification Guangxi University for Nationalities, China
Horizon 2020 Framework Programme	798225
Natural Science Foundation of Guangdong Province	2018A0303130048
Guangxi University for Nationalities	GXPSMM18ZD-02

Keywords

eco-friendly materials
green biopolymer engineering
liquid-responsiveness
starch-based ionically conductive materials
strain-responsiveness
wearable sensors

ASJC Scopus subject areas

General Chemistry
Environmental Chemistry
General Chemical Engineering
Renewable Energy, Sustainability and the Environment

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acssuschemeng.0c07473

Cite this

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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.",

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AU - Liu, Peng

AU - Ma, Cong

AU - Li, Ying

AU - Wang, Liming

AU - Wei, Linjie

AU - Yan, Yinlei

AU - Xie, Fengwei

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AB - 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.

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Facile Preparation of Eco-Friendly, Flexible Starch-Based Materials with Ionic Conductivity and Strain-Responsiveness

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

UN SDGs

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