Journal
MATERIALS RESEARCH EXPRESS
Volume 6, Issue 8, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2053-1591/ab2320
Keywords
self-healing; stretchable; capacitance sensors; pressure and strain dual sensing
Categories
Funding
- National Key Research and Development Program of China [2017YFB037001]
- National Natural Science Foundation of China [91648109]
- Jiangsu Provincial 333 High-level Talent Training Project
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Developing stretchable and self-healable skin-like materials have received increasing research for their broad application in wearable sensors, artificial intelligence, and soft robotics. However, development of skin-like sensor that can combine superior stretchable and self-healing ability is still a challenge. In this work, we designed a tough and self-healing hydrogel by formation of the hydrogen bonds and dual metal-carboxylate coordination bonds among pectin, poly(acrylic acid) and metal ions. The reversible nature of dynamic coordination interactions endowing the hydrogel high stretchability (1214%), excellent recovery property as well as superior self-healing ability (94% healing efficiency in 2 h) without any assistance of external stimuli. The stretchable and self-healable capacitance sensors are based on the hydrogel can detect a large scale of pressures, monitor the multifarious human motions, mimic the function of self-healing and sensation properties of natural skins. This work provides excellent performance of pressure and strain sensors based on the stretchable and self-healable hydrogel, it shows great potential in the field of electronic skin systems.
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