| Popis: |
The development of intelligent edible films with food preservation and monitoring function is of great significance and applications. Herein, active intelligent edible films with pH-responsiveness, long term antioxidant and antibacterial activities were prepared base on gelatin. In this work, gelatin was chemically and physically combined with rosmarinic acid (RosA) and blueberry anthocyanins extract (BAE) to fabricate RosA-gelatin/BAE (RGA) films with the crosslinking of dialdehyde starch (DS). We found that the RGA films possess dense micromorphology, robust mechanical property, outstanding light barrier ability and good water resistance property. The introduction of rosmarinic acid and anthocyanins endows the RGA films with admirable long-term antioxidant and antibacterial activities. Significantly, the RGA films exhibit excellent pH/NH3 responsiveness to show visible color change. It is worth noting that the films can real-time monitor and delay the spoilage of fresh fish. Overall, the intelligent and active RGA films possess promising application for food preservation and real-time quality monitoring. |
