期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 164, 期 -, 页码 187-194出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2018.05.044
关键词
Flexible composites; Electrical properties; Mechanical properties
资金
- National Natural Science Foundation of China [61601342, 51772030]
- National Key Research and Development Program of China New Energy Project for Electric Vehicle [2016YFB0100204]
- Joint Funds of the National Natural Science Foundation of China [U1564206]
- Natural Science Basic Research Plan in Shaanxi Province of China [2016ZDJC-07]
- Shaanxi Postdoctoral Science Foundation funded project [2017BSHYDZZ36]
- Major achievements Transformation Project for Central University in Beijing
Three-dimensional porous graphene foams have received increasing attention in the fields of sensors, flexible conductors, and energy storage. Mechanical stability, flexibility, and electrical conductivity are prerequisites for materials used in these fields. In this paper, novel polyimide-based graphene foam was prepared by dip-coating a polyimide foam template followed by chemical reduction and thermal reduction. The prepared foam displayed excellent mechanical stability and flexibility (elastic modulus: similar to 5 kPa). The synergistic effects of chemical and thermal reduction led to a foam with high electrical conductivity of similar to 0.4 S m(-1). By controlling the dip-coating times, the foam achieved a high pressure sensitivity of 0.36 kPa(-1). Experiments show that the prepared foam can be used as effective pressure sensor to measure heartbeat, joint activity, and airflow.
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