期刊
ADVANCED SCIENCE
卷 7, 期 12, 页码 -出版社
WILEY
DOI: 10.1002/advs.202000177
关键词
elastomer composites; electromagnetic interference shielding; foamed elastomers; liquid metals; thermal conductivity switch
资金
- Science and Technology Program from State Grid Corporation of China [5700-201955318A-0-0-00]
It is remarkably desirable and challenging to design a stretchable conductive material with tunable electromagnetic-interference (EMI) shielding and heat transfer for applications in flexible electronics. However, the existing materials sustained a severe attenuation of performances when largely stretched. Here, a super-stretchable (800% strain) liquid metal foamed elastomer composite (LMF-EC) is reported, achieving super-high electrical (approximate to 10(4) S cm(-1)) and thermal (17.6 W mK(-1)) conductivities under a large strain of 400%, which also exhibits unexpected stretching-enhanced EMI shielding effectiveness of 85 dB due to the conductive network elongation and reorientation. By varying the liquid and solid states of LMF, the stretching can enable a multifunctional reversible switch that simultaneously regulates the thermal, electrical, and electromagnetic wave transport. Novel flexible temperature control and a thermoelectric system based on LMF-EC is furthermore developed. This work is a significant step toward the development of smart electromagnetic and thermal regulator for stretchable electronics.
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