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<p>Freestanding, lightweight, and flexible copper-decorated hollow silicon carbide (HSiC) fibrous mats were fabricated via co-axial electrospinning associated with chemical plating technology. In order to enhance the electromagnetic interference (EMI) shielding properties of HSiC fibrous mats as well as possess high-temperature stability and corrosion resistance properties, electroless Cu coating was firstly deposited on HSiC fibers. The EMI shielding performances of HSiC@Cu fibrous mats were evaluated in the frequency range of 1.5–10&#xa0;GHz using a free-space antenna-based system. Benefiting from the high content of Cu-decorated hollow fiber-stacked foam architecture, the EMI shielding effectiveness enhanced up to 88 ± 13&#xa0;dB, which was mainly attributed to the increase of reflection and multiple internal reflections. Moreover, in consideration of the density and thickness, these materials possessed desirable shielding effectiveness (SSE) up to 530.5&#xa0;dB&#xa0;cm<sup>3</sup>&#xa0;g<sup>−1</sup> and absolute shielding effectiveness (SSE<sub>t</sub>) high to 10,104.76&#xa0;dB&#xa0;cm<sup>2</sup>&#xa0;g<sup>−1</sup>, which were much better than those of pristine HSiC fibrous mats and void-free Cu foil. Aside from high thermal stability and corrosion resistance, HSiC@Cu fibrous mats would be considered as a good candidate for electromagnetic shielding materials in harsh environment.</p>

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Enhanced electromagnetic interference shielding performance of freestanding Cu-decorated hollow SiC fibrous mats in the Gigahertz Range

  • 期刊论文

  • 发表日期：

    2025年8月20日

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  • Yanan Liu,
  • Dong Gui,
  • Yiman Gao,
  • Zishuo Zhang,
  • Ying Xu,
  • Yang Liu,
  • Deng-Guang Yu,
  • Hak-Yong Kim

摘要

Freestanding, lightweight, and flexible copper-decorated hollow silicon carbide (HSiC) fibrous mats were fabricated via co-axial electrospinning associated with chemical plating technology. In order to enhance the electromagnetic interference (EMI) shielding properties of HSiC fibrous mats as well as possess high-temperature stability and corrosion resistance properties, electroless Cu coating was firstly deposited on HSiC fibers. The EMI shielding performances of HSiC@Cu fibrous mats were evaluated in the frequency range of 1.5–10 GHz using a free-space antenna-based system. Benefiting from the high content of Cu-decorated hollow fiber-stacked foam architecture, the EMI shielding effectiveness enhanced up to 88 ± 13 dB, which was mainly attributed to the increase of reflection and multiple internal reflections. Moreover, in consideration of the density and thickness, these materials possessed desirable shielding effectiveness (SSE) up to 530.5 dB cm3 g−1 and absolute shielding effectiveness (SSEt) high to 10,104.76 dB cm2 g−1, which were much better than those of pristine HSiC fibrous mats and void-free Cu foil. Aside from high thermal stability and corrosion resistance, HSiC@Cu fibrous mats would be considered as a good candidate for electromagnetic shielding materials in harsh environment.