目的 以壳聚糖和玉米淀粉为主要成膜基质，以纳米ZnO为添加剂，研究复合膜的相关结构和性能。方法 采用溶液共混法将壳聚糖溶液、淀粉糊化液及纳米ZnO质均混合，然后流延成膜，分析壳聚糖/淀粉的质量比和纳米ZnO的含量对复合膜力学性能、水蒸气透过率（WVP）的影响，并通过红外光谱、扫描电镜、X射线衍射和热重分析对复合膜的相关结构进行表征。结果 当壳聚糖/淀粉质量比为1∶1，纳米ZnO质量分数为9%时，所得膜在各自体系中的性能较佳。结论 壳聚糖和淀粉二者之间具有较好的相容性，纳米ZnO的加入能增强复合膜的力学性能，降低其水蒸气透过率，并提高复合膜的热稳定性。

The work aims to study the relevant structure and performances of composite film, with chitosan and corn starch as the main film-forming substrate and the nano ZnO as the additive. The chitosan liquid, starch gelatinized liquid and nano ZnO were homogeneously mixed by solution blending process and then film casting was done. The influence of the mass ratio of chitosan/starch and the nano ZnO content on the mechanical properties and water vapor permeability of the composite films was analyzed, and the relevant structure of the composite films were characterized by infrared spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD) and thermogravimetry analysis (TGA). When the mass ratio of chitosan/starch was 1∶1, and the mass fraction of nano ZnO was 9%, the composite films obtained had better performance in their respective systems. These results pointed out that there was a good compatibility between chitosan and starch. The addition of nano ZnO can improve the mechanical properties of composite films, reduce their water vapor permeability and improve their thermal stability.