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<p>In this work, a simple, low-cost and palladium-free method for the electroless metallization of polyethylene terephthalate (PET) fibers was developed to enable insulate PET fibers with electrical conductivity. The activation solution containing silver nanoparticles (AgNPs) dispersed in dimethyl sulfoxide (DMSO) is applied to form a polyvinylpyrrolidone (PVP)-rich surface-physical-interpenetrating-network (SPIN) structure on the surface of the PET fibers. The formed AgNPs adsorb to the PVP within SPIN, serving as active sites dispersed on the fiber surface for metal deposition. The obtained AgNP-SPIN surface was examined by morphological and chemical characterizations, confirming the complete modification over the PET fiber surface. Followed by electroless copper plating, a uniform and dense copper layer with a thickness of approximately 0.8&#xa0;μm was deposited covering the PET fiber surface. The fabricated conductive PET fibers exhibit outstanding flexibility and strong adhesion between the copper and polymer interface. By sewing the developed conductive fiber threads onto the fabric, the flexible circuit on regular cotton cloth was realized.</p>

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Electroless copper plating on PET fibers through one-step pretreatment involving SPIN structure with silver nanoparticles

  • 期刊论文

  • 发表日期：

    2026年1月6日

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  • Binbin Zhang,
  • Yuanhao Liu,
  • Guorui Mou,
  • Zhijie Liang,
  • Chong Wang,
  • Guoyun Zhou,
  • Jiujuan Li,
  • Wenjun Yang,
  • Zesheng Wen,
  • Yongqiang Xu,
  • Wei He,
  • Yan Hong

摘要

In this work, a simple, low-cost and palladium-free method for the electroless metallization of polyethylene terephthalate (PET) fibers was developed to enable insulate PET fibers with electrical conductivity. The activation solution containing silver nanoparticles (AgNPs) dispersed in dimethyl sulfoxide (DMSO) is applied to form a polyvinylpyrrolidone (PVP)-rich surface-physical-interpenetrating-network (SPIN) structure on the surface of the PET fibers. The formed AgNPs adsorb to the PVP within SPIN, serving as active sites dispersed on the fiber surface for metal deposition. The obtained AgNP-SPIN surface was examined by morphological and chemical characterizations, confirming the complete modification over the PET fiber surface. Followed by electroless copper plating, a uniform and dense copper layer with a thickness of approximately 0.8 μm was deposited covering the PET fiber surface. The fabricated conductive PET fibers exhibit outstanding flexibility and strong adhesion between the copper and polymer interface. By sewing the developed conductive fiber threads onto the fabric, the flexible circuit on regular cotton cloth was realized.