聚(己二酸/对苯二甲酸)-丁二醇酯基自发气调薄膜的性能研究及应用OA北大核心CSTPCD

A type of blending films based on poly(butylene adipate-co-terephthalate)(PBAT)and poly(lactic-co-butane-diol itaconate)(PLBI)were prepared at different mass ratios through melt extrusion using a twin-screw extruder.The ef-fect of PLBI content on the thermal performance,mechanical properties,and gas permeability of the blending films was investigated.The modified atmosphere packaging(MAP)system was designed on the basis of the gas permeability of material and the respiratory characteristics of strawberry.This MAP system was used for a strawberry-preserving experi-ment.The results indicated that the blended films achieved favorable mechanical properties at a PLBI content of 15 wt% .Through adjusting the blending ratio,the CO2/O2 penetration ratio of the blending films was reduced from 10.57 to about 3～7.Simultaneously,the water retention capacity of the blending films was enhanced.This makes the blend-ing films more suitable for air-adjusted fruit and vegetable packaging.This packaging system can be used to extend the shelf life of strawberries up to 21 days under low-temperature storage conditions.