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<p>Polyolefins with intrinsic antimicrobial properties have attracted significant attention. In this study, various ion-functionalized polyolefins were successfully constructed by incorporating iodine-containing comonomers into a polypropylene backbone, followed by post-functionalization strategies that utilized the conversion reactions of pre-introduced iodine groups. The introduction of ionic groups induced notable changes in both the thermal properties and the melt rheological behavior of the material. The dual crosslinking mechanism based on ionic interactions and polypropylene crystallization significantly enhanced the mechanical strength of the material. In addition, imidazolium-based ionomers exhibit highly effective antimicrobial properties against Gram-negative <i>Escherichia coli</i> and Gram-positive <i>Staphylococcus aureus</i>. Specifically, the P5-CCl<sub>3</sub>CO<sub>2</sub><sup>−</sup> sample achieved a sterilization rate of 99.99% against both bacteria and maintained a high bactericidal efficacy of above 90%, even after continuous supplementation with fresh bacterial solutions for 15 days. Consequently, this polypropylene-based ionomer, which combines excellent mechanical strength with outstanding antimicrobial performance, demonstrates substantial application potential in children’s toys, food packaging, and medicine.</p>

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Dynamic Ionic Crosslinking Polypropylene-based Elastomers with Excellent Mechanical Properties and Antibacterial Performance

  • 期刊论文

  • 发表日期：

    2026年2月2日

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  • Xiao-Hui Mao,
  • Wen-Lie Gaoguo,
  • Li Pan,
  • Bin Wang,
  • Chun-Sheng Xiao,
  • Yue-Sheng Li

摘要

Polyolefins with intrinsic antimicrobial properties have attracted significant attention. In this study, various ion-functionalized polyolefins were successfully constructed by incorporating iodine-containing comonomers into a polypropylene backbone, followed by post-functionalization strategies that utilized the conversion reactions of pre-introduced iodine groups. The introduction of ionic groups induced notable changes in both the thermal properties and the melt rheological behavior of the material. The dual crosslinking mechanism based on ionic interactions and polypropylene crystallization significantly enhanced the mechanical strength of the material. In addition, imidazolium-based ionomers exhibit highly effective antimicrobial properties against Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus. Specifically, the P5-CCl3CO2− sample achieved a sterilization rate of 99.99% against both bacteria and maintained a high bactericidal efficacy of above 90%, even after continuous supplementation with fresh bacterial solutions for 15 days. Consequently, this polypropylene-based ionomer, which combines excellent mechanical strength with outstanding antimicrobial performance, demonstrates substantial application potential in children’s toys, food packaging, and medicine.