期刊
ACS APPLIED BIO MATERIALS
卷 4, 期 1, 页码 770-779出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsabm.0c01353
关键词
shikonin; propolis; gelatin/carrageenan; color indicator film; antioxidant; antibacterial; smart packaging
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2019R1A2C2084221]
The gelatin/carrageenan-based functional intelligent film, incorporating propolis and shikonin, demonstrated excellent properties in color change, gas sensing, UV blocking, antimicrobial, and antioxidant functions, successfully being applied in monitoring food freshness. The mechanical, thermal, and vapor barrier properties of the film were not significantly affected by blending the functional fillers.
Gelatin/carrageenan-based functional intelligent film was fabricated by incorporating shikonin and propolis. The shikonin solution extracted from the gromwell (Lithospermum erythrorhizon) root showed excellent pH-responsive color-changing properties in the broad pH range of 2-12 with good gas sensing and color stability properties. The bioactive functional filler materials (propolis and shikonin) were evenly dispersed in the gelatin/carrageenan matrix. The blending of propolis and shikonin enhanced the composite film's UV blocking property without decreasing much transparency. The mechanical, thermal, and vapor barrier properties of the film were not considerably affected by blending the functional fillers. The addition of propolis and shikonin provided the gelatin/carrageenan composite film with outstanding functional properties (antimicrobial activity and high antioxidant function). The intelligent film was successfully used to monitor the freshness of packaged milk. The intelligent film with functional properties is beneficial in enabling food safety and extending the shelf life of food by monitoring the quality of food.
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