Highly Stretchable Polymer Composite with Strain-Enhanced Electromagnetic Interference Shielding Effectiveness

Bin Yao, Wei Hong, Tianwu Chen, Zhubing Han, Xinwei Xu, Renchao Hu, Jianyu Hao, Changhao Li, He Li, Steven E. Perini, Michael T. Lanagan, Sulin Zhang, Qing Wang, Hong Wang

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Article number1907499
JournalAdvanced Materials
Volume32
Issue number14
DOIs
StatePublished - Apr 1 2020

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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