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<p>This study introduces a new silver-based antibacterial coating for white cotton fabric, overcoming the discoloration and durability limitations of traditional silver ion agents. A one-pot hydrothermal synthesis created a waterborne polyurethane (WPU) resin with imidazole groups. Combining this WPU resin with a silver ammonia solution and applying it to cotton fabric resulted in a functionalized textile with superior whiteness retention and lasting antibacterial properties. After 8&#xa0;h of simulated sunlight, the whiteness of the treated fabric (76.8%) showed a significant improvement of 30.6% compared to a similar treatment without imidazole (58.8%), and even surpassed that of the untreated fabric (76.5%). Furthermore, the fabric maintained 99.9% inhibition rates against <i>E. coli</i> and <i>S. aureus</i> after 20 washes, with no adverse effects on other performance characteristics. This innovative approach enables the large-scale production of silver-coated antibacterial agents suitable for light-colored cotton textiles.</p> Graphical Abstract <p></p>

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One-Pot Preparation of a Novel Imidazole-Containing Water Polyurethane to Improve the Discoloration and Durability of Silver Ion Antimicrobial Finishes on Light-Colored Cotton Fabrics

  • 期刊论文

  • 发表日期：

    2025年6月17日

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  • Linghui Kong,
  • Almas Anwar,
  • Jiahui Li,
  • Ning Fang,
  • Yuying Zhang,
  • Yuzhu Zhai,
  • Yijun Jiang

摘要

This study introduces a new silver-based antibacterial coating for white cotton fabric, overcoming the discoloration and durability limitations of traditional silver ion agents. A one-pot hydrothermal synthesis created a waterborne polyurethane (WPU) resin with imidazole groups. Combining this WPU resin with a silver ammonia solution and applying it to cotton fabric resulted in a functionalized textile with superior whiteness retention and lasting antibacterial properties. After 8 h of simulated sunlight, the whiteness of the treated fabric (76.8%) showed a significant improvement of 30.6% compared to a similar treatment without imidazole (58.8%), and even surpassed that of the untreated fabric (76.5%). Furthermore, the fabric maintained 99.9% inhibition rates against E. coli and S. aureus after 20 washes, with no adverse effects on other performance characteristics. This innovative approach enables the large-scale production of silver-coated antibacterial agents suitable for light-colored cotton textiles.

Graphical Abstract