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<p>With growing public health awareness, the antibacterial performance of textiles has gained increasing importance. Bacterial adhesion on textile surfaces can lead to medical implant-related infections and contribute to the spread of infectious diseases. By preventing bacterial colonization, both material durability and safety can be enhanced. In this study, initial bacterial adhesion was effectively prevented through the construction of a physical barrier. The results showed that sulfobetaine-modified carboxymethyl chitosan (SPCM) was successfully prepared by reacting carboxymethyl chitosan (CMC) with sulfobetaine (SPB) at a molar ratio of 0.9:1, using 1&#xa0;wt% of ammonium persulfate at 70&#xa0;°C for 4&#xa0;h. SPCM exhibited substantially better thermal stability than CMC, indicating its suitability for high-temperature textile finishing processes. The minimum inhibitory concentration values of SPCM against <i>E. coli</i> and <i>S. aureus</i> were 375 and 187&#xa0;μg/mL. Compared with CMC,&#xa0;the antibacterial activity increased by 26.8% against&#xa0;<i>E. coli</i>&#xa0;and 27.0% against&#xa0;<i>S. aureus</i>. At a concentration of 40&#xa0;g/L, SPCM-treated fabrics showed antibacterial adhesion rates of 89.5% for&#xa0;<i>E. coli</i>&#xa0;and 94.2% for&#xa0;<i>S. aureus</i>, representing improvements by sevenfold and threefold, respectively, relative to CMC-treated fabrics.</p>

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Sulfobetain-modified carboxymethyl chitosan for the construction of antibacterial adhesion interfaces on cotton fabric

  • 期刊论文

  • 发表日期：

    2026年5月1日

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  • Junyi Lu,
  • Zhiqiang Zhao,
  • Lili Wang,
  • Xiangyu Li,
  • Minghua Wu

摘要

With growing public health awareness, the antibacterial performance of textiles has gained increasing importance. Bacterial adhesion on textile surfaces can lead to medical implant-related infections and contribute to the spread of infectious diseases. By preventing bacterial colonization, both material durability and safety can be enhanced. In this study, initial bacterial adhesion was effectively prevented through the construction of a physical barrier. The results showed that sulfobetaine-modified carboxymethyl chitosan (SPCM) was successfully prepared by reacting carboxymethyl chitosan (CMC) with sulfobetaine (SPB) at a molar ratio of 0.9:1, using 1 wt% of ammonium persulfate at 70 °C for 4 h. SPCM exhibited substantially better thermal stability than CMC, indicating its suitability for high-temperature textile finishing processes. The minimum inhibitory concentration values of SPCM against E. coli and S. aureus were 375 and 187 μg/mL. Compared with CMC, the antibacterial activity increased by 26.8% against E. coli and 27.0% against S. aureus. At a concentration of 40 g/L, SPCM-treated fabrics showed antibacterial adhesion rates of 89.5% for E. coli and 94.2% for S. aureus, representing improvements by sevenfold and threefold, respectively, relative to CMC-treated fabrics.