Scholarlink

<p>Electromagnetic interference from 5G and intelligent electronics demands lightweight, broadband high-efficiency microwave absorption (MA) materials. PAN-based carbonaceous nanofibers are promising MA candidates, yet balancing dielectric loss and impedance matching via simple process regulation remains challenging. Herein, we tailor precursor viscosity by synergistically regulating electrospinning voltage and PAN content, fabricating PAN/phenolic resin-based carbonaceous nanofibers with a unique webbed interconnected structure via electrospinning and subsequent thermal treatments. This structure enriches heterogeneous interfaces for enhanced interfacial polarization loss and forms continuous conductive pathways for improved conductive loss. The optimal WFF-15 sample achieves an effective absorption bandwidth (EAB) of 5.4&#xa0;GHz (12.6–18.0&#xa0;GHz) and a minimum reflection loss (RLmin) of −15.4&#xa0;dB at 2.0&#xa0;mm. Mechanistic analyses confirm that the balanced conductive/polarization loss and improved impedance matching from the webbed structure account for the superior MA performance. This work clarifies the intrinsic correlation between process parameters, precursor viscosity, webbed structure, and dielectric loss synergy, providing a low-cost scalable strategy for designing high-performance carbon-based MA materials for electromagnetic protection and radar stealth applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Viscosity-regulated webbed interconnected structure in pan/phenolic resin-based carbonaceous nanofibers: enhanced microwave absorption performance via synergistic dielectric loss

  • 期刊论文

  • 发表日期：

    2026年6月2日

查看全文
  • Weiwei Pei,
  • Hongli Liu,
  • Guanqi Xu,
  • Junjie Zhang,
  • Wenshuo Cao,
  • Mingwei Li,
  • Xianlin Xiao,
  • Yuhao Liu

摘要

Electromagnetic interference from 5G and intelligent electronics demands lightweight, broadband high-efficiency microwave absorption (MA) materials. PAN-based carbonaceous nanofibers are promising MA candidates, yet balancing dielectric loss and impedance matching via simple process regulation remains challenging. Herein, we tailor precursor viscosity by synergistically regulating electrospinning voltage and PAN content, fabricating PAN/phenolic resin-based carbonaceous nanofibers with a unique webbed interconnected structure via electrospinning and subsequent thermal treatments. This structure enriches heterogeneous interfaces for enhanced interfacial polarization loss and forms continuous conductive pathways for improved conductive loss. The optimal WFF-15 sample achieves an effective absorption bandwidth (EAB) of 5.4 GHz (12.6–18.0 GHz) and a minimum reflection loss (RLmin) of −15.4 dB at 2.0 mm. Mechanistic analyses confirm that the balanced conductive/polarization loss and improved impedance matching from the webbed structure account for the superior MA performance. This work clarifies the intrinsic correlation between process parameters, precursor viscosity, webbed structure, and dielectric loss synergy, providing a low-cost scalable strategy for designing high-performance carbon-based MA materials for electromagnetic protection and radar stealth applications.