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Highly Stretchable Polymer Composite with Strain-Enhanced Electromagnetic Interference Shielding Effectiveness |
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| Authors: | 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 |
| Affiliation: | 1. State Key Laboratory for Mechanical Behavior of Materials, School of Material Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049 China
Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, 16802 USA;2. Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen, 518055 China;3. Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA, 16802 USA;4. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, 16802 USA;5. State Key Laboratory for Mechanical Behavior of Materials, School of Material Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049 China;6. Department of Materials Science and Engineering and Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055 China;7. Materials Research Institute, The Pennsylvania State University, University Park, PA, 16802 USA |
| 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. |
| Keywords: | electromagnetic interference shielding liquid metals polymer nanocomposites stretchable electronics 3D microstructures |
