Research and Application Progress of Structural Color-Responsive Food Intelligent Packaging

Structural color response is the interference of light caused by external factors on the crystal structure of structural color materials, resulting in color change response. Based on this, various response types of food intelligent packaging can be designed to achieve visualization and real-time monitoring of the quality of food and packaging environment inside the packaging. This article reviews the principles, research, and application progress of structural color responsive food intelligent packaging caused by temperature, humidity, mechanical stress, gas, and pH. At the same time, it analyzes the challenges faced by structural color responsive food intelligent packaging and looks forward to its development direction, in order to provide reference for promoting further research and application of structural color based food intelligent packaging.