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Highly Stretchable Polymer Composite with Strain‐Enhanced Electromagnetic Interference Shielding Effectiveness
Author(s) -
Yao Bin,
Hong Wei,
Chen Tianwu,
Han Zhubing,
Xu Xinwei,
Hu Renchao,
Hao Jianyu,
Li Changhao,
Li He,
Perini Steven E.,
Lanagan Michael T.,
Zhang Sulin,
Wang Qing,
Wang Hong
Publication year - 2020
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201907499
Subject(s) - materials science , electromagnetic shielding , composite material , emi , electromagnetic interference , composite number , elastomer , electrical conductor , polymer , carbon nanotube , stretchable electronics , conductive polymer , toughness , electronics , electrical engineering , engineering
Polymer composites with electrically conductive fillers have been developed as mechanically flexible, easily processable electromagnetic interference (EMI) shielding materials. Although there are a few elastomeric composites with nanostructured silvers and carbon nanotubes showing moderate stretchability, their EMI shielding effectiveness (SE) deteriorates consistently with stretching. Here, a highly stretchable polymer composite embedded with a three‐dimensional (3D) liquid‐metal (LM) network exhibiting substantial increases of EMI SE when stretched is reported, which matches the EMI SE of metallic plates over an exceptionally broad frequency range of 2.65–40 GHz. The electrical conductivities achieved in the 3D LM composite are among the state‐of‐the‐art in stretchable conductors under large mechanical deformations. With skin‐like elastic compliance and toughness, the material provides a route to meet the demands for emerging soft and human‐friendly electronics.