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<p>The growing severity of antimicrobial resistance in medical and industrial textiles highlights the limitations of conventional antibacterial agents, especially under high humidity and repeated washing. To address this challenge, a synergistic “oxidative activation–polymer coating” strategy was employed to engineer the fabric surface in this work. A robust phenol-amine cross-linked coating layer was constructed via oxidative activation with caffeic acid (CA), followed by deposition of polyethyleneimine (PEI) and interfacial association. The resulting coating showed high antibacterial efficacy in vitro, achieving 99.99% inhibition against both <i>E. coli</i> and <i>S. aureus</i>. After 50 washing cycles under laboratory laundering conditions, the in vitro antibacterial activity remained above 95%, while the fabric backbone and mechanical properties were maintained. This durability is attributed to a cross-linked network formed through hydrogen bonding, electrostatic interactions and condensation reactions, which enhances interfacial robustness. Moreover, the coating exhibits a multichannel antibacterial mechanism, involving the in situ generation of reactive oxygen species (ROS) under oxidative conditions, which may act cooperatively with surface cationic amines. This study presents a metal-free, practical strategy for antibacterial functionalization of inert polymer fabrics and offers mechanistic insights based on the results obtained.</p> Graphical Abstract <p></p>

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Preparation and Performance of Polyester Fabrics with Antibacterial Modification Based on a Catechol–Polyethyleneimine Synergistic System

  • 期刊论文

  • 发表日期：

    2026年7月16日

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  • Mengting Wei,
  • Feiyang Cheng,
  • Chaowei Zhu,
  • Chen Shi,
  • Jian Han,
  • Xuebing Hou

摘要

The growing severity of antimicrobial resistance in medical and industrial textiles highlights the limitations of conventional antibacterial agents, especially under high humidity and repeated washing. To address this challenge, a synergistic “oxidative activation–polymer coating” strategy was employed to engineer the fabric surface in this work. A robust phenol-amine cross-linked coating layer was constructed via oxidative activation with caffeic acid (CA), followed by deposition of polyethyleneimine (PEI) and interfacial association. The resulting coating showed high antibacterial efficacy in vitro, achieving 99.99% inhibition against both E. coli and S. aureus. After 50 washing cycles under laboratory laundering conditions, the in vitro antibacterial activity remained above 95%, while the fabric backbone and mechanical properties were maintained. This durability is attributed to a cross-linked network formed through hydrogen bonding, electrostatic interactions and condensation reactions, which enhances interfacial robustness. Moreover, the coating exhibits a multichannel antibacterial mechanism, involving the in situ generation of reactive oxygen species (ROS) under oxidative conditions, which may act cooperatively with surface cationic amines. This study presents a metal-free, practical strategy for antibacterial functionalization of inert polymer fabrics and offers mechanistic insights based on the results obtained.

Graphical Abstract