目的 通过对玉米醇溶蛋白(Zein)进行结构修饰，提高其在Pickering乳液两相界面之间的稳定性，并赋予其一定的抗氧化活性，研究负载肉桂精油Pickering乳液壳聚糖活性涂膜对采后芒果的保鲜效果。方法 使用碱处理法制备没食子酸修饰的玉米醇溶蛋白(Zein-g-GA)共价物，以其为乳化剂制备肉桂精油Pickering乳液，最后将乳液与壳聚糖溶液复合，并涂于芒果的表面，研究复合涂膜对采后芒果室温贮藏期间果实生理生化指标的影响，评价Pickering乳液壳聚糖涂膜对采后芒果的保鲜效果。结果 以Zein-g-GA为乳化剂制备得到的肉桂精油Pickering乳液粒径分布均匀，约为3.618 μm。负载肉桂精油Pickering乳液壳聚糖活性涂膜液通过在芒果果实表面形成一层气体阻隔性薄膜，抑制果实的呼吸代谢，从而阻止果实的硬度、pH、可溶性固形物等发生剧烈的变化，同时抑制芒果体内丙二醛的积累，减少膜脂氧化损伤，提高果实体内抗氧化酶活性，保持芒果采后贮藏品质。结论 Zein-g-GA具有稳定精油的能力，负载了肉桂精油Pickering乳液的壳聚糖活性涂膜可以提高对芒果的保鲜效果，延长其货架期，壳聚糖活性涂膜在水果保鲜方面具有广阔的发展前景。

The work aims to improve the stability of Zein modified by Gallic Acid (GA) at the interfaces of Pickering emulsion, endow it with antioxidant activity, and study the preservation effects of chitosan coating film on postharvest mangoes. The covalent compound (Zein-g-GA) of Zein and GA was prepared by alkaline treatment method. Zein-g-GA was used as an emulsifier to prepare Cinnamon Essential Oil (CEO) Pickering emulsion, and then the emulsion and chistosan solution were compounded and coated on the mango surface to study the effect of the composite film on the physiological and biochemical indicators of postharvest mangoes during room temperature storage and evaluate the preservation effect of the composite film. The particle size of CEO Pickering emulsion prepared with Zein-g-GA covalent as an emulsifier was uniform, about 3.618 μm. The chitosan/Zein-based Pickering emulsion coating film formed a film with good gas barrier on the surface of mango, reduced the water loss during storage, downgraded the weight loss rate of fruit, and prevented the drastic changes in hardness, pH and Total Soluble Solids (TSS). Meanwhile, the film inhibited the accumulation of MAD in mango, reduced the membrane lipid oxidation damage, and enhanced the antioxidant enzyme activity in the fruit, thereby maintaining the quality of mango during storage. The gallic acid modified Zein has the ability to stabilize essential oil, and chitosan/Zein-based Pickering emulsion film can be utilized as a coating packaging material to improve the preservation effects of postharvest mango and extend its shelf life. The chitosan coating film has broad development prospects in fruit preservation.