College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, PR China.
Department of Food Science and Engineering, Jinan University, Guangzhou 510632, PR China.
Food Chem. 2022 Mar 30;373(Pt A):131409. doi: 10.1016/j.foodchem.2021.131409. Epub 2021 Oct 18.
Straw mushrooms are prone to autolyze, leading to a high requirement of environmental humidity. In this work, thermoplastic starch/polylactic acid/poly (butylene adipate-co-terephthalate) (TPS/PLA/PBAT) film was produced by extrusion. The moisture permeability of the film was controlled by adjusting the content of TPS, which could be expected to further control humidity of the microenvironment in the package. Results revealed that the water vapor transmission rate of the film linearly increased from 612.31 g/m·24 h to 1082.50 g/m·24 h with the increase in the TPS concentration. The TPS/PLA/PBAT film with 30 wt% TPS showed the strongest inhibition on the autolysis of straw mushrooms compared with other groups, effectively delaying the increase in the free water, soluble solid content, rate of weight loss, and polyphenol oxidase of straw mushrooms and extending the shelf life of straw mushrooms from 24 h to 72 h.
草菇容易自溶，对环境湿度要求较高。本工作采用挤出法制备了热塑性淀粉/聚乳酸/聚对苯二甲酸丁二醇酯（TPS/PLA/PBAT）薄膜。通过调整 TPS 的含量来控制薄膜的透湿性，有望进一步控制包装内微环境的湿度。结果表明，随着 TPS 浓度的增加，薄膜的水蒸气透过率从 612.31 g/m·24 h 线性增加到 1082.50 g/m·24 h。与其他组相比，TPS 含量为 30wt%的 TPS/PLA/PBAT 薄膜对草菇的自溶抑制作用最强，有效延缓了草菇游离水、可溶性固形物含量、失重率和多酚氧化酶的增加，将草菇的货架期从 24h 延长至 72h。
