以马铃薯淀粉、普鲁兰多糖、明胶为成膜物质，氯化钙为交联剂，甘油、山梨醇、聚乙二醇为增塑剂，采用流延法制备了马铃薯淀粉基复合膜，研究了3种增塑剂对复合膜物理机械性能的影响。结果表明：复合膜的抗拉强度和弹性模量均随增塑剂含量的增加而显著减小，断裂伸长率随甘油和山梨醇含量的增加而显著增加，聚乙二醇对其影响不显著；复合膜的水蒸气透过率和水溶性均随增塑剂含量的增加而增加；聚乙二醇能够显著降低复合膜的透光率。

Potato starch-based composite films were prepared by casting using potato starch, pullulan, gelatin as film forming material, calcium chloride as cross-linking agent, and glycerol, sorbitol, and polyethylene glycol as plasticizer. The effects of three kinds of plasticizers on physical and mechanical properties of composite films were studied. The results showed that tensile strength and Young's modulus of the composite films decrease significantly with plasticizer contents; elongation increases significantly with glycerol and sorbitol contents; effect of polyethylene glycol on elongation is not obvious; water vapor permeability and water solubility of composite films increase with plasticizer contents; polyethylene glycol can reduce the light transmission rate of the composite films significantly.