▎ 摘　　要

NOVELTY - Use of graphitic carbon nitride (g-C3N4) based high antibacterial and high barrier modified atmosphere fresh-keeping plastic product for fresh-keeping of fruits and vegetables, meat, prepared dishes or semi-finished food. The plastic product is made by blending and melting g-C3N4 material and plastic base material. The particle diameter of the g-C3N4 material is 0.02-17 microns. USE - The plastic product is used for fresh-keeping of fruits and vegetables, meat, prepared dishes or semi-finished food. ADVANTAGE - The plastic product not only has a simple process, but also has excellent fresh-keeping ability, specifically it has high barrier properties to water vapor, oxygen, carbon dioxide and other gases at the same time, has high antibacterial properties against Escherichia coli and Staphylococcus aureus, can decompose mature gases e.g. ethylene, modified atmosphere fresh-keeping plastic products with high antibacterial and high barrier properties can adapt to different fresh-keeping environments, has good fresh-keeping effect in freezing (≤ 11°C), cold storage (0-10°C), normal temperature, and dark environments, so that it can efficiently keep food fresh and prolong the freshness of food.