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Preparation and properties of flexible electromagnetic shielding composites

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Abstract

Although traditional metallic electromagnetic shielding materials have appeared for quite a long time, the defects of high density and poor flexibility have limited their further applications for modern society. Luckily, a flexible rubber stuffed with light conductive materials is promising to solve this puzzlement and hence has attracted much attention. In this paper, a novel kind of flexible electromagnetic shielding material system was invented using cobalt-plated carbon aerogel as a conductive filler in the silicone rubber matrix. With a cobalt content of 30%, the 8-layered composite reveals the tensile strength of the composite is 1.23 MPa, and the fracture elongation is 128.7%. The shielding efficiency was measured to be 11.56 dB, and the electromagnetic wave transmittance of the composite was significantly decreased to less than 10%, indicating that at least 90% of electromagnetic waves can be reflected or absorbed. This excellent electromagnetic shielding performance can be ascribed to a combined action of interlayer multiple reflections, low dielectric loss of carbon aerogel, and low magnetic loss of cobalt particles. In addition, the composite also shows a good hydrophobic and high thermal stability, further extending the application feasibility in complex environments.

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The datasets generated during and/or analyzed during the current study are not publicly available but are available from the corresponding author on reasonable request.

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Funding

The authors would like to thank Major Science and Technology Projects of Anhui Province (Grant No: 2021e03020005) for their financial support.

Author information

Authors and Affiliations

  1. College of Mechanics and Materials, Hohai University, Nanjing, 211100, China

    Yao Du, Zhixiang Dai, Fan Bu, Manjiang Li, Gaiye Li & Jianfeng Zhang

  2. Sinosteel Maanshan New Material Technology Co., Ltd, Maanshan, 243000, China

    Lei Liu, Jun Wang & Chuanhua Xu

Authors
  1. Yao Du
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  2. Zhixiang Dai
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  3. Fan Bu
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  4. Manjiang Li
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  5. Gaiye Li
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  6. Lei Liu
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  7. Jun Wang
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  8. Chuanhua Xu
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  9. Jianfeng Zhang
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Contributions

YD contributed toward conceptualization, methodology, software, formal analysis, data curation, and writing—original Draft. ZD contributed toward writing—review & editing, supervision, and funding acquisition. FB contributed toward validation and data curation. ML contributed toward formal analysis and writing—review & editing. GL contributed toward formal analysis and writing—review & editing. LL contributed toward formal analysis and writing—review & editing. JW contributed toward writing—review & editing and supervision. CX contributed toward writing—review & editing and supervision. JZ contributed toward writing—review & editing and supervision.

Corresponding author

Correspondence to Jianfeng Zhang.

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Du, Y., Dai, Z., Bu, F. et al. Preparation and properties of flexible electromagnetic shielding composites. J Mater Sci: Mater Electron 34, 2241 (2023). https://doi.org/10.1007/s10854-023-11641-x

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