以玉米淀粉、氧化淀粉和酯化淀粉为原料，甘油和聚乙烯醇（PVA）作为混合增塑剂，溶液流延法制备了玉米淀粉、氧化淀粉和酯化淀粉的二元混合淀粉/PVA复合膜，并对其进行了外观和透光率检测，发现等重的玉米淀粉和氧化淀粉的混合淀粉/PVA复合膜的光亮性好，在紫外线、红外线和可见光下的透过率均最高。进一步研究混合淀粉中玉米淀粉的含量对其复合膜的影响。结果表明：混合淀粉/PVA复合膜均具有较高的透光率，可见光透过率高于55%。玉米淀粉含量为30%时，混合淀粉/PVA复合膜具有最高的拉伸强度，达到17.5 MPa。所有的淀粉/PVA复合膜的吸湿率在40 h后达到平衡吸湿率，玉米淀粉含量为30%的混合淀粉/PVA复合膜具有最高的吸湿率，达到48.9%。综合来看，玉米淀粉含量为30%的混合淀粉/PVA复合膜性能最佳。

Dual mixed starch/polyvinyl alcohol (PVA) composite films were prepared by solution casting, in which corn starch, oxidized starch, and esterified starch were used as raw materials, glycerol and PVA as mix plasticizer, their appearances and transmittances were tested, and it was found that the mixed starch/PVA composite film with equal weight of corn starch and oxidized starch had good brightness, with the highest transmittance under ultraviolet, infrared, and visible light. The effect of corn starch content in mixed starch on the composite films were further investigated. The results showed that the mixed starch/PVA composite films had high light transmittance, and the visible light transmittance was higher than 55%. When the corn starch content is 30%, the mixed starch/PVA composite film has the highest tensile strength of 17.5 MPa. The moisture absorption rate of all starch/PVA composite films reached the equilibrium absorption rate after 40 h, and the mixed starch/PVA composite film with 30% corn starch content had the highest moisture absorption rate of 48.9%. Overall, the mixed starch/PVA composite film with 30% corn starch content had the best performance.