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Chin. Phys. B, 2021, Vol. 30(1): 018401    DOI: 10.1088/1674-1056/abc2b3
INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY Prev   Next  

Stretchable electromagnetic interference shielding and antenna for wireless strain sensing by anisotropic micron-steel-wire based conductive elastomers

Xiaoyu Hu(胡晓宇), Linlin Mou(牟琳琳), and Zunfeng Liu(刘遵峰)†
State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Chemistry, and Key Laboratory of Functional Polymer Materials, Nankai University, Tianjin 300071, China
Abstract  We prepare stretchable elastic electromagnetic interference (EMI) shielding and stretchable antenna for wireless strain sensing using an elastic composite comprising commercial steel wool as a conducting element. The prepared elastic conductor shows anisotropic electrical properties in response to the external force. In the stretchable range, the electrical resistance abnormally decreases with the increase of tensile deformation. The EMI shielding effectiveness of the elastic conductor can reach above -30 dB under 80% tensile strain. The resonance frequency of the dipole antenna prepared by the elastic conductor is linearly correlated with the tensile strain, which can be used as a wireless strain sensor. The transmission efficiency is stable at about -15 dB when stretched to 50% strain, with attenuation less than 5%. The current research provides an effective solution for stretchable EMI shielding and wireless strain sensing integrated with signal transmission by an antenna.
Keywords:  conductive elastomer      electromagnetic shielding      dipole antenna      strain sensor  
Revised:  20 October 2020      Published:  17 December 2020
PACS:  84.32.Ff (Conductors, resistors (including thermistors, varistors, and photoresistors))  
  84.40.Ba (Antennas: theory, components and accessories)  
  81.05.Ni (Dispersion-, fiber-, and platelet-reinforced metal-based composites)  
  07.50.-e (Electrical and electronic instruments and components)  
Fund: Project supported by the State Key Development Program for Basic Research of China (Grant Nos. 2016YFA0200200 and 2017YFB0307001), the National Natural Science Foundation of China (Grant Nos. 51973093, U1533122, and 51773094), and the Natural Science Foundation of Tianjin, China (Grant No. 18JCZDJC36800).
Corresponding Authors:  Corresponding author. E-mail: liuzunfeng@nankai.edu.cn   

Cite this article: 

Xiaoyu Hu(胡晓宇), Linlin Mou(牟琳琳), and Zunfeng Liu(刘遵峰) Stretchable electromagnetic interference shielding and antenna for wireless strain sensing by anisotropic micron-steel-wire based conductive elastomers 2021 Chin. Phys. B 30 018401

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