中国物理B ›› 2021, Vol. 30 ›› Issue (1): 18401-.doi: 10.1088/1674-1056/abc2b3

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  • 收稿日期:2020-09-09 修回日期:2020-10-20 接受日期:2020-10-20 出版日期:2020-12-17 发布日期:2020-12-17

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)†   

  1. State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Chemistry, and Key Laboratory of Functional Polymer Materials, Nankai University, Tianjin 300071, China
  • Received:2020-09-09 Revised:2020-10-20 Accepted:2020-10-20 Online:2020-12-17 Published:2020-12-17
  • Contact: †Corresponding author. E-mail: liuzunfeng@nankai.edu.cn
  • Supported by:
    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).

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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.

Key words: conductive elastomer, electromagnetic shielding, dipole antenna, strain sensor

中图分类号:  (Conductors, resistors (including thermistors, varistors, and photoresistors))

  • 84.32.Ff
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)