利用LiCl/DMAc为溶剂，将5种不同种类及聚合度的纤维素浆粕溶解成了铸膜液，采用相转移的方法制备了纤维素包装膜，并研究了包装膜的机械性能和结构。结果表明：同种类浆粕，纤维素膜的拉伸强度和断裂伸长率随着聚合度的增大而增大；针叶浆制备的纤维素膜的机械强度优于用阔叶浆和棉浆制备的薄膜；通过对包装膜表面结构分析可知，棉浆、阔叶浆、针叶木浆制备的纤维素包装膜的表面粗糙度值依次减小，聚合度为1286的针叶浆纤维素膜的断面结构最致密。

Five different polymerization degrees of cellulose pulps were dissolved in LiCl/DMAc solution, and the cellulose packaging films were prepared by phase transfer technology. The influence of polymerization degree of pulp on mechanical strength and structures of cellulose packaging film was studied. The results showed that tensile strength and elongation at break increased along with the increase of polymerization degree, and the mechanical properties of the films with hardwood were best. The surface roughness decreases following cotton pulp, hardwood pulp to softwood pulp in turn, and the films with hardwood (DP=1286) has dense cross structures.