期刊
JOURNAL OF ELECTRONIC MATERIALS
卷 50, 期 6, 页码 3084-3094出版社
SPRINGER
DOI: 10.1007/s11664-021-08873-0
关键词
Electric heater; electrothermal film; hybrid conductive fillers; polymer blends
资金
- Natural Science Foundation of Zhejiang Province [LY21E020005]
- China Postdoctoral Science Foundation [2020M671785, 2020T130597]
- National Natural Science Foundation of China [U20A20253]
An electrothermal film with sandwich-like structure composed of hybrid conductive fillers and polymer matrix has been fabricated, demonstrating low voltage operation, superior response feature, high electrothermal conversion efficiency, stability, and potential for practical applications.
Owing to easy processability, ultralight weight, and low cost, carbon- and polymer-based composite materials are among emerging and promising electrothermal materials for high-performance flexible electric heaters. In this work, a sandwich-like structured electrothermal film composed of hybrid conductive fillers [Super-P (SP) and graphite], polymer blends matrix [thermoplastic polyurethane (TPU) and polyethersulfone (PES)], and alumina oxide (Al2O3) as a non-conductive filler has been fabricated by a facile slurry coating method. Hybrid conductive fillers of graphite and SP particles have a uniform spatial distribution in a TPU/PES polymer matrix, which construct a highly stable and continuous conductive network with a low percolation threshold of conductive filler content (14.8 wt.%) that allows electrothermal films to operate at a low applied dc voltage. As for the electrothermal film with 15 wt.% hybrid conductive fillers (SP/G-15 sample), it exhibits a superior response feature, high electrothermal conversion efficiency, stable structural stability and remarkable electrothermal reproducibility. More impressively, SP/G-15 composite electrothermal film as an integrated electric heater for heating water demonstrates a high potential in practical application scenarios. Graphic
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