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<p>The rapid development of science and technology has led to the aggravation and complexity of electromagnetic radiation pollution. Therefore, multifunctional electromagnetic interference shielding materials have become increasingly indispensable. Based on the advantages of textile materials, the modular coupling assembly strategy was utilized to achieve the structural regulation of the multifunctional PP conductive composite film and effectively endowed it with excellent EMI shielding performance. In this study, the adhesive property of polydopamine was utilized to enhance the chemical reactivity of PP films. The construction of porous conductive structures and core–shell conductive structures of PPy inside and outside PP fibers was achieved by controlling the polymerization rate of pyrrole in a low-temperature environment. The macroscopic encapsulation of the hydrophobic layer enhanced the bonding strength between the PP substrate and the conductive layer. The results show that different concentrations of pyrrole affected the microstructure and EMI shielding performance. When the concentration of pyrrole was 0.8&#xa0;mol/L, the surface contact angle and surface resistance of the PP composite film were 138.42° and 73&#xa0;Ω, respectively. In addition, the shielding value of the PP composite film was as high as 28.02&#xa0;dB, which could effectively shield 99.84% of electromagnetic waves. This preparation strategy of coupling multiple functional layers to realize multifunctional composite films provides research ideas for the structural design of multi-purpose smart wearable electromagnetic protection composite materials.</p>

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PPy-decorated composite film with lightweight and flexible properties based on step assembly strategy for electromagnetic shielding performance

  • 期刊论文

  • 发表日期：

    2025年12月23日

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  • Yanting Wang,
  • Shiyu Song,
  • Xilin Liao,
  • Pei wen Zhou,
  • Runchuan Li,
  • Mengxing Xing,
  • Jia-Horng Lin,
  • Liang Li,
  • Rangtong Liu

摘要

The rapid development of science and technology has led to the aggravation and complexity of electromagnetic radiation pollution. Therefore, multifunctional electromagnetic interference shielding materials have become increasingly indispensable. Based on the advantages of textile materials, the modular coupling assembly strategy was utilized to achieve the structural regulation of the multifunctional PP conductive composite film and effectively endowed it with excellent EMI shielding performance. In this study, the adhesive property of polydopamine was utilized to enhance the chemical reactivity of PP films. The construction of porous conductive structures and core–shell conductive structures of PPy inside and outside PP fibers was achieved by controlling the polymerization rate of pyrrole in a low-temperature environment. The macroscopic encapsulation of the hydrophobic layer enhanced the bonding strength between the PP substrate and the conductive layer. The results show that different concentrations of pyrrole affected the microstructure and EMI shielding performance. When the concentration of pyrrole was 0.8 mol/L, the surface contact angle and surface resistance of the PP composite film were 138.42° and 73 Ω, respectively. In addition, the shielding value of the PP composite film was as high as 28.02 dB, which could effectively shield 99.84% of electromagnetic waves. This preparation strategy of coupling multiple functional layers to realize multifunctional composite films provides research ideas for the structural design of multi-purpose smart wearable electromagnetic protection composite materials.