Journal
POLYMER
Volume 211, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2020.123095
Keywords
Strain sensor; Poly (vinyl alcohol); (+/-)-alpha-Thioctic acid; Stretchable; Double-network hydrogel
Categories
Funding
- National Program for Support of Top-notch Young Professionals, National Natural Science Foundation of China, China [51773049]
- China, China Aerospace Science and Technology Corporation-Harbin Institute of Technology Joint Center for Technology Innovation Fund, China [HIT15-1A01]
- Shanghai Academy of Spaceflight Technology Fund, China [SAST2017-126]
- China, Harbin city science and technology projects, China [2013DB4BP031, RC2014QN017035]
- China Postdoctoral Science Special Foundation, China [201003420, 20090460067]
- HIT Research Institute (Zhao Yuan) of New Materials and Intelligent Equipment Technology Co., Ltd. Scientific and Technological Cooperation and Development Fund, China [2017KJHZ002]
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Hydrogel-based strain sensor with the stretchable, self-healable and wearable properties has made great contributions in the field of modern electronics. However, currently, ultra-high stretchability and strain sensitivity are required to satisfy the practical applications for polyvinyl alcohol-borate (PVA-Borax) hydrogel-based strain sensor. Herein, we fabricated a new highly stretchable hydrogel strain sensor based on PVA-Borax and (+/-)-alpha-Thioctic acid-iron (III) (TA-Fe3+) double-network hydrogel matrix and multi-walled carbon nanotubes (CNTs). The strain sensors displayed an extremely wide strain-sensing range (approximate to 1350% fracture strain) with a gauge factor of 11.50 and showed rapid recovery of electrical properties in the cut-healing cycles (<4s). Compared with previous PVA-Borax based strain sensors materials, the new double-network hydrogel strain sensors achieved more favorable functionalities in human motion monitoring, which can satisfy versatile application requirements ranging from extremely stretchable, wearable, self-healable electronic devices to future soft robot.
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