Preparation of Gallic Acid-Grafted Silkworm Pupae Chitosan Composite Film and Its Application in Blueberry Preservation

Chitosan films are promising for food packaging but are limited by poor solubility, weak mechanical strength, and insufficient functional properties. Most conventional chitosan is derived from crustacean shells, with limited exploration of alternative biosources. To overcome these drawbacks, this study utilized silkworm pupae chitosan as a substrate and graft-modified it with gallic acid (GA-g-CS) to develop functional composite films for blue- berry preservation. The results showed that the...