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<p>This study developed a waterproof, breathable, and conductive knitted fabric by sequentially combining in-situ polymerization and electrospinning techniques. A pure cotton knitted fabric served as the substrate, onto which polypyrrole (PPy) was polymerized to impart conductivity, followed by electrospinning a polyvinylidene fluoride (PVDF) membrane to achieve waterproofness and breathability. Key parameters were systematically optimized: For PPy polymerization, the lowest surface resistivity was achieved at 10°C with 0.3 mol/L pyrrole concentration and 2.5 h reaction time. For PVDF electrospinning, the largest water contact angle (indicating superior hydrophobicity) was obtained using a 14 wt% PVDF solution in a DMF/acetone (4:6 v/v) solvent system, with an applied voltage of 14 kV and a spinning distance of 19 cm.The resulting composite fabric exhibited excellent electrical conductivity (surface resistivity &lt; 100 Ω/sq), outstanding waterproofness (contact angle &gt; 130°), and satisfactory breathability (moisture permeability &gt; 3000 g/m<sup>2</sup>·24h). Furthermore, the fabric demonstrated stable Joule heating performance (reaching 60 ℃ at 5 V within 60 s), making it suitable for wearable heating applications. This work provides a feasible strategy for designing multifunctional textiles, offering new insights into the development of smart wearable systems with integrated thermal management and environmental protection.</p>

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Preparation and electric heating performance of waterproof and breathable conductive knitted fabrics based on electrospinning technology

  • 期刊论文

  • 发表日期：

    2025年11月3日

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  • Yafang Li,
  • Yinong Sun,
  • Beining Ma,
  • Zhihao Li,
  • Jing Yan,
  • Yixia Zhao

摘要

This study developed a waterproof, breathable, and conductive knitted fabric by sequentially combining in-situ polymerization and electrospinning techniques. A pure cotton knitted fabric served as the substrate, onto which polypyrrole (PPy) was polymerized to impart conductivity, followed by electrospinning a polyvinylidene fluoride (PVDF) membrane to achieve waterproofness and breathability. Key parameters were systematically optimized: For PPy polymerization, the lowest surface resistivity was achieved at 10°C with 0.3 mol/L pyrrole concentration and 2.5 h reaction time. For PVDF electrospinning, the largest water contact angle (indicating superior hydrophobicity) was obtained using a 14 wt% PVDF solution in a DMF/acetone (4:6 v/v) solvent system, with an applied voltage of 14 kV and a spinning distance of 19 cm.The resulting composite fabric exhibited excellent electrical conductivity (surface resistivity < 100 Ω/sq), outstanding waterproofness (contact angle > 130°), and satisfactory breathability (moisture permeability > 3000 g/m2·24h). Furthermore, the fabric demonstrated stable Joule heating performance (reaching 60 ℃ at 5 V within 60 s), making it suitable for wearable heating applications. This work provides a feasible strategy for designing multifunctional textiles, offering new insights into the development of smart wearable systems with integrated thermal management and environmental protection.