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<p>Cotton textiles (CTs) are in high demand for antimicrobial applications. Traditional approaches often struggle to achieve antibacterial and antifungal efficacy simultaneously. Herein, organosilicon quaternary ammonium salt (QAS/AEM-5700, a contact bactericidal agent) and organosilicon borneol ester (SBA, a stereochemical anti-adhesive agent) are covalently co-grafted onto CT surfaces <i>via</i> siloxane hydrolytic condensation, generating a synergistic antimicrobial coating (CT-A/S) that integrates both offensive and defensive functionalities. The as-prepared CT-A/S exhibits excellent antimicrobial activity against <i>Escherichia coli</i> (<i>E. coli</i>), <i>Staphylococcus aureus</i> (<i>S. aureus</i>), and <i>Aspergillus niger</i> (<i>A. niger</i>), with antimicrobial rates approaching 100%. Owing to the covalent immobilization, the CT-A/S demonstrates outstanding laundering durability. This strategy not only overcomes the deficiency of QAS-modified CT in mold resistance, but also addresses the limitation of borneol ester in contact-based bacterial killing. Furthermore, an <i>in vivo</i> mice infection model validates the antibacterial and anti-infective efficacy of the coating, offering a promising approach for the long-term antimicrobial protection of healthcare textiles.</p>

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Organosilicon Borneol Ester/Quaternary Ammonium Salt Based Attack-Defense Coatings for Durable Antibacterial and Antifungal Cotton Textiles

  • 期刊论文

  • 发表日期：

    2026年7月14日

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  • Wenjing Niu,
  • Songtao Wang,
  • Yi Liu,
  • Wanli Liang,
  • Wensheng Xie,
  • Guofeng Li,
  • Xing Wang

摘要

Cotton textiles (CTs) are in high demand for antimicrobial applications. Traditional approaches often struggle to achieve antibacterial and antifungal efficacy simultaneously. Herein, organosilicon quaternary ammonium salt (QAS/AEM-5700, a contact bactericidal agent) and organosilicon borneol ester (SBA, a stereochemical anti-adhesive agent) are covalently co-grafted onto CT surfaces via siloxane hydrolytic condensation, generating a synergistic antimicrobial coating (CT-A/S) that integrates both offensive and defensive functionalities. The as-prepared CT-A/S exhibits excellent antimicrobial activity against Escherichia coli (E. coli), Staphylococcus aureus (S. aureus), and Aspergillus niger (A. niger), with antimicrobial rates approaching 100%. Owing to the covalent immobilization, the CT-A/S demonstrates outstanding laundering durability. This strategy not only overcomes the deficiency of QAS-modified CT in mold resistance, but also addresses the limitation of borneol ester in contact-based bacterial killing. Furthermore, an in vivo mice infection model validates the antibacterial and anti-infective efficacy of the coating, offering a promising approach for the long-term antimicrobial protection of healthcare textiles.