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A Flexible Silver-Hollow-Fiber Film by Blow-Spinning and UV-Induced Microstructural Engineering for High Efficiency Electromagnetic Interference Shielding
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  • Huan Zhang,
  • Jufeng Huang,
  • Yu Wang,
  • Yaxian Qin,
  • Sen Lin
Huan Zhang
Guangxi University
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Jufeng Huang
Guangxi University
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Yu Wang
Guangxi University
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Yaxian Qin
Guangxi University
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Sen Lin
Guangxi University

Corresponding Author:[email protected]

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Abstract

As the prevalence of electromagnetic interference (EMI) continues to rise, there is a growing demand for shielding materials, which play a crucial role in electronic devices, communication systems, and health protection etc. However, conventional EMI shielding materials encounter difficulties in effectively addressing the escalating intricacies of electromagnetic environments and diverse shielding scenarios, wherein foldability, flexibility and lightweight are desired. In this work, we develop a novel EMI shielding material, silver-hollow-fiber (AgHF), by combining blow-spinning, UV radiation and temperature-controlled annealing technologies. During fabrication process, UV radiation was used to selectively reduce silver ions on the outer surface of precursor fiber, and temperature-controlled annealing was further employed to remove the inside polymer, forming a hollow fiber structure. The AgHF exhibits superior flexibility, lightweight, remarkable mechanical stability, and excellent EMI shielding efficiency (SE). Particular, the AgHF with a thickness of 163 μm demonstrates an EMI SE of 101.65 dB, and with minimal degradation of less than 10% even after undergoing 2,000 bending cycles. The remarkable EMI shielding performance, combined with the lightweight, flexibility, and mechanical stability of AgHF, positions it as a highly promising material for a wide range of EMI shielding applications in the future.