Antibacterial and clusteroluminogenic hypromellose-graft-chitosan-based polyelectrolyte complex films with high functional flexibility for food packaging

Wing Fu Lai, Shuyang Zhao, Jiachi Chiou

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)


Food packaging can extend the shelf life of food products and enhance the safety and quality of the food. This study reports food-grade polyelectrolyte complex films generated via electrostatic interactions between two cellulose-based agents [viz., hypromellose-graft-chitosan, and carmellose sodium]. At optimal conditions, our films show good barrier properties, high transparency, and high efficiency in post-production agent loading. They also demonstrate intrinsic antibacterial effects against both Gram-negative and Gram-positive bacteria. By using frozen chicken breasts as a model, the films enable real-time monitoring of the status of the frozen food due to the property of clusterisation-triggered emission. Along with their negligible toxicity, our films warrant further development as multi-functional films for effective and self-indicating food packaging.

Original languageEnglish
Article number118447
JournalCarbohydrate Polymers
Publication statusPublished - 1 Nov 2021


  • Clusterisation-triggered emission
  • Food preservation
  • Luminescence
  • Packaging materials
  • Real-time monitoring

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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