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The purpose of this study is to develop a fresh-keeping packaging material that can monitor the freshness of food and effectively ensure food safety. Chitosan (CS) was used as the matrix, and different qualities of MA were added to prepare CS-MA composite membranes using a tape casting method. Study the effect of different concentrations of mulberry anthocyanins (MA) on the performance of chitosan composite films. The experimental results showed that there were hydrogen bonding forces in the composite films, and the intermolecular interactions provided the materials with good film-forming effects and properties. The DPPH radical scavenging was increased by 145%. The CS-MA films showed significant color changes under different acidic and alkaline environmental condition. The composite film showed light reddish brown under 3% hydrochloric acid atmosphere conditions; bright yellowish brown under 3% ammonia atmosphere conditions. This composite film can be used for real-time monitoring of the freshness of foods.

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Preparation and Performance Study of pH-Sensitive Mulberry Anthocyanin/Chitosan Films

  • 会议论文

  • 发表日期：

    2025年

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  • Hui Liu,
  • Lirui Liu,
  • Yiyang Chen,
  • Yabo Fu,
  • Jiazi Shi,
  • Gaimei Zhang,
  • Dongli Li

摘要

The purpose of this study is to develop a fresh-keeping packaging material that can monitor the freshness of food and effectively ensure food safety. Chitosan (CS) was used as the matrix, and different qualities of MA were added to prepare CS-MA composite membranes using a tape casting method. Study the effect of different concentrations of mulberry anthocyanins (MA) on the performance of chitosan composite films. The experimental results showed that there were hydrogen bonding forces in the composite films, and the intermolecular interactions provided the materials with good film-forming effects and properties. The DPPH radical scavenging was increased by 145%. The CS-MA films showed significant color changes under different acidic and alkaline environmental condition. The composite film showed light reddish brown under 3% hydrochloric acid atmosphere conditions; bright yellowish brown under 3% ammonia atmosphere conditions. This composite film can be used for real-time monitoring of the freshness of foods.