目的 研究可降解材料聚乳酸(PLA)/聚丁二酸丁二醇酯-聚己二酸丁二醇酯共聚物(PBSA)薄膜在添加有机纳米蒙脱土(MMT)和精油后的抗氧化性和保鲜性能。方法 采用挤出共混改性和挤出流延法加工制备出 PLA/PBSA/MMT/精油纳米复合薄膜，对其力学性能、透湿性、透气性、抗氧化性等进行探讨，并研究对樱桃的保鲜作用。结果 添加了 DK4 型号 MMT 的 PLA/PBSA 薄膜的抗拉强度得到提高，薄膜的水蒸气透过率、透气率得到降低，但是对樱桃保鲜的各项指标与对照组无明显差异。在此基础上添加丁香精油后，力学性能得到提升，抗氧化作用明显，并且对改善樱桃的保鲜效果显著增加。结论 添加了 DK4 型 MMT 和丁香精油的 PLA/PBSA 薄膜有着较好的改性效果，并且有良好的保鲜效果。

The work aims to study the oxidation resistance and fresh-keeping performance of the biodegradable polylactic acid (PLA)/poly(butylenesuccinate adipate) (PBSA) film added with organic nano montmorillonite (MMT) and clove essential oil. PLA/PBSA/MMT/essential oil nanocomposite films were prepared through extrusion blending modification and extrusion casting method. The mechanical property, moisture permeability, air permeability and oxidation resistance, etc. of the films were discussed; moreover, the preservation effect of cherries was studied. The PLA/PBSA film added with DK4 MMT not only increased its tensile strength, but also decreased the WVP and OP. However, there was no significant difference from the control indexes in the preservation of cherries. On this basis, after the addition of clove essential oil, mechanical property was improved, the antioxidation was obvious and the preservative effect of cherries was significantly improved. PLA/PBSA film added with DK4 MMT and clove essential oil has better modification effect and good preservative effect.