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<p>This study developed an antimicrobial composite film with dual functions of antibacterial activity and freshness preservation. Carvacrol-loaded microcapsules were embedded into a linear low-density polyethylene (LLDPE) matrix using the melt extrusion process. Compared to the pure LLDPE film, the composite films containing 0.5% and 1% carvacrol microcapsules (0.5% CM and 1% CM, respectively) showed significantly altered physical properties. They exhibited an enhanced water vapor barrier, with permeability reductions of 17.4% and 27.5%, respectively, along with superior thermal stability. Moreover, the film surface became more hydrophilic, as indicated by a reduced water contact angle, which correlated with the presence of microcapsules. Antibacterial tests demonstrated significant inhibitory effects against <i>Erwinia carotovora</i> and <i>Pectobacterium carotovorum</i>, the primary pathogens causing carrot soft rot. When applied to fresh-cut carrot preservation, the composite films reduced respiration rate and malondialdehyde content, thereby maintaining hardness and minimizing weight loss. The results indicate that the carvacrol composite film possesses promising antibacterial and preservation properties, showing great potential for application in food packaging.</p>

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Development of Carvacrol Microcapsules Incorporated Polyethylene Antimicrobial Films for Active Packaging in Fresh-Cut Carrot Preservation

  • 期刊论文

  • 发表日期：

    2026年3月30日

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  • Haitao Long,
  • Zhonghua Tang,
  • Lumei Pu,
  • Weibing Xu,
  • Fuxin Liu,
  • Yongcai Li,
  • Yang Bi

摘要

This study developed an antimicrobial composite film with dual functions of antibacterial activity and freshness preservation. Carvacrol-loaded microcapsules were embedded into a linear low-density polyethylene (LLDPE) matrix using the melt extrusion process. Compared to the pure LLDPE film, the composite films containing 0.5% and 1% carvacrol microcapsules (0.5% CM and 1% CM, respectively) showed significantly altered physical properties. They exhibited an enhanced water vapor barrier, with permeability reductions of 17.4% and 27.5%, respectively, along with superior thermal stability. Moreover, the film surface became more hydrophilic, as indicated by a reduced water contact angle, which correlated with the presence of microcapsules. Antibacterial tests demonstrated significant inhibitory effects against Erwinia carotovora and Pectobacterium carotovorum, the primary pathogens causing carrot soft rot. When applied to fresh-cut carrot preservation, the composite films reduced respiration rate and malondialdehyde content, thereby maintaining hardness and minimizing weight loss. The results indicate that the carvacrol composite film possesses promising antibacterial and preservation properties, showing great potential for application in food packaging.