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A highly elastic, Room-temperature repairable and recyclable conductive hydrogel for stretchable electronics.

Authors
  • Wang, Haifei1
  • Lu, Jiameng1
  • Huang, Huayi1
  • Fang, Senlin1
  • Zubair, Muhammad1
  • Peng, Zhengchun2
  • 1 Center for Stretchable Electronics and Nanophotonic Sensors, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, PR China. , (China)
  • 2 Center for Stretchable Electronics and Nanophotonic Sensors, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, PR China. Electronic address: [email protected] , (China)
Type
Published Article
Journal
Journal of Colloid and Interface Science
Publisher
Elsevier
Publication Date
Apr 15, 2021
Volume
588
Pages
295–304
Identifiers
DOI: 10.1016/j.jcis.2020.12.035
PMID: 33406464
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Conductive hydrogels present great potential in bioelectronics, ionotronic devices, and electronic skin. However, the creeping and plastic deformation of hydrogel often lead to poor stability and low reliability in applications. Here, we report a highly elastic conductive hydrogel based on crosslinked carbon nanotubes (CNT) and poly(vinyl alcohol) (PVA). With the formation of double crosslinking interactions, i.e., strong interaction from covalent acetal bonds and weak interaction from hydrogen bonds, CNT-PVA networks exhibit good stretchability (fracture stain up to 500%), rapid recovery, zero-residual deformation, and excellent mechanical stability. As such, the electromechanical response of this dual-crosslinked conductive hydrogel is stable and repeatable for a wide range of loading rates. Benefiting from the abundant hydroxyl groups and reversible acetal linking bridges in hydrogel networks, the prepared conductive hydrogel is not only repairable at room temperature, but also recyclable. Copyright © 2020 Elsevier Inc. All rights reserved.

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