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<p>With the ubiquitous integration of electronic devices into daily life, managing electromagnetic radiation pollution has become a critical environmental and health concern. Developing textile materials that simultaneously offer high-efficiency electromagnetic interference (EMI) shielding and wear comfort is of significant research value. This study investigates a novel composite coating strategy on cotton fabrics, utilizing a sequential self-assembly process involving graphene oxide (GO) adsorption–reduction and <i>in situ</i> pyrrole polymerization. The research systematically explores the effects of precursor concentrations and, crucially, the assembly sequence on the fabric’s electrical and shielding properties. Results demonstrate that constructing a reduced graphene oxide (RGO) conductive skeleton followed by the polymerization of a polypyrrole (PPy) layer (Cotton/RGO/PPy) yields superior performance compared to the reverse sequence. This optimized architecture facilitates the formation of a continuous, smooth conductive network where PPy bridges the gaps between RGO sheets, enhanced by strong π-π stacking interactions. The resulting composite fabric, fabricated with 1&#xa0;g/L GO and 0.35&#xa0;mol/L pyrrole, achieves an EMI shielding effectiveness of approximately 80% (corresponding to ~ 15–20&#xa0;dB) with excellent wash durability. This work provides a robust strategy for fabricating lightweight, flexible, and durable protective textiles.</p>

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Sequential Self-Assembly of Reduced Graphene Oxide and Polypyrrole on Cotton Fabrics for Efficient Electromagnetic Interference Shielding

  • 期刊论文

  • 发表日期：

    2026年4月27日

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  • Chengchen Fu,
  • Jiao Ye,
  • Bingjie Fan,
  • Jiliang Cao

摘要

With the ubiquitous integration of electronic devices into daily life, managing electromagnetic radiation pollution has become a critical environmental and health concern. Developing textile materials that simultaneously offer high-efficiency electromagnetic interference (EMI) shielding and wear comfort is of significant research value. This study investigates a novel composite coating strategy on cotton fabrics, utilizing a sequential self-assembly process involving graphene oxide (GO) adsorption–reduction and in situ pyrrole polymerization. The research systematically explores the effects of precursor concentrations and, crucially, the assembly sequence on the fabric’s electrical and shielding properties. Results demonstrate that constructing a reduced graphene oxide (RGO) conductive skeleton followed by the polymerization of a polypyrrole (PPy) layer (Cotton/RGO/PPy) yields superior performance compared to the reverse sequence. This optimized architecture facilitates the formation of a continuous, smooth conductive network where PPy bridges the gaps between RGO sheets, enhanced by strong π-π stacking interactions. The resulting composite fabric, fabricated with 1 g/L GO and 0.35 mol/L pyrrole, achieves an EMI shielding effectiveness of approximately 80% (corresponding to ~ 15–20 dB) with excellent wash durability. This work provides a robust strategy for fabricating lightweight, flexible, and durable protective textiles.