Scholarlink

<p>Electrospun aramid nanofiber membranes possess excellent mechanical strength, thermal stability, flame retardancy, chemical resistance, and a high specific surface area, making them ideal candidates for high-temperature flexible circuit substrates, thermal protective layers in aerospace, and thermal insulation liners for military armor. However, their intrinsic poor electrical conductivity and rigidity severely limit their application in EMI and flexible wearable electronics. To address these challenges, we designed a multilayered flexible composite film by integrating aramid nanofiber membranes with a dual-network hydrogel. A discontinuous copper “reflection layer” was constructed on the hydrogel interface via spray deposition, while MWCNTs embedded within the membrane formed an internal “absorption layer,” together enabling a synergistic EMI shielding mechanism. The resulting composite achieved a high shielding effectiveness of up to 57&#xa0;dB in the 8.2–12.4&#xa0;GHz frequency range. The film is stretchable, bendable, and pressure-sensitive, capable of reliably detecting strain, bending, and pressure variations. Moreover, the pressure-induced signals can be encoded for information transmission, such as Morse code. This study not only expands the application scope of aramid nanofiber membranes in flexible EMI shielding but also proposes a novel strategy for integrating signal sensing and encoding, offering a versatile platform for next-generation intelligent wearable electronics.</p> Graphical abstract <p></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

Preparation and signal encoding of PMIA nanofiber-reinforced hydrogel composite films for electromagnetic interference shielding

  • 期刊论文

  • 发表日期：

    2025年11月14日

查看全文
  • Shuyue Zhu,
  • Liang Li,
  • Yuanyuan Zhang,
  • Suwei Gao,
  • Beibei Ge,
  • Xilin Liao,
  • Yanting Wang,
  • Shujing Li,
  • Rangtong Liu

摘要

Electrospun aramid nanofiber membranes possess excellent mechanical strength, thermal stability, flame retardancy, chemical resistance, and a high specific surface area, making them ideal candidates for high-temperature flexible circuit substrates, thermal protective layers in aerospace, and thermal insulation liners for military armor. However, their intrinsic poor electrical conductivity and rigidity severely limit their application in EMI and flexible wearable electronics. To address these challenges, we designed a multilayered flexible composite film by integrating aramid nanofiber membranes with a dual-network hydrogel. A discontinuous copper “reflection layer” was constructed on the hydrogel interface via spray deposition, while MWCNTs embedded within the membrane formed an internal “absorption layer,” together enabling a synergistic EMI shielding mechanism. The resulting composite achieved a high shielding effectiveness of up to 57 dB in the 8.2–12.4 GHz frequency range. The film is stretchable, bendable, and pressure-sensitive, capable of reliably detecting strain, bending, and pressure variations. Moreover, the pressure-induced signals can be encoded for information transmission, such as Morse code. This study not only expands the application scope of aramid nanofiber membranes in flexible EMI shielding but also proposes a novel strategy for integrating signal sensing and encoding, offering a versatile platform for next-generation intelligent wearable electronics.

Graphical abstract