期刊
POLYMER TESTING
卷 93, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2020.106879
关键词
Anti-freeze; Supramolecular conductive hydrogels; Double networks; High strength; Sensor
资金
- National Nature Science Foundation of China [21504022]
- China Postdoctoral Science Foundation [2018M642745, 2020M672179]
- Program for Innovative Research Team (in Science and Technology) in the University of Henan Province [19IRTSTHNO27]
- Training Program for young Backbone Teachers in the University of Henan Province [2020GGJS052]
- Young Backbone Teachers Program of Henan Polytechnic University [2017XQG-06]
The study synthesized a freezing-tolerant conductive hydrogel with double networks via an one-pot method, which exhibits high strength, fatigue resistance, and high ionic conductivity, suitable for wearable intelligent electronics.
It is significant to design stretchable conductive hydrogels with high integrated mechanical and excellent antifreezing performances for broadening their application fields. Herein, a freezing-tolerant and robust poly(N-hydroxymethyl acrylamide)/gelatin/glycerol supramolecular conductive hydrogel with double networks is synthesized via an one-pot method, where poly(N-hydroxymethyl acrylamide) can self-cross-link, and also interact with gelatin. Glycerol endows the conductive hydrogel with anti-freezing property in mechanics and electricity, and can also interact with poly(N-hydroxymethyl acrylamide) and gelatin to further enhance mechanical properties. Under optimal conditions, the conductive hydrogel exhibits high strength, super extensibility, rapid self-recovery, excellent fatigue resistance and high ionic conductivity. It possesses temperature insensitivity of mechanical properties and weak dependence of electrical behaviors on temperature. Furthermore, it exhibits excellent anti-freezing resistance response to strain, and can as sensor detect human activities. Thus, this work provides a simple and promising strategy for designing stretchable conductive gels with integrated high performances aiming for wearable intelligent electronics.
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