中文摘要：

以细菌纤维素为原料，氯化锂（LiCl）／二甲基乙酰胺（DMAc）为溶剂，通过相转化法制备了细菌纤维素膜。用单纤维强力仪对膜的拉伸强度和伸长率进行测试，分析了细菌纤维素浓度、凝固浴温度、凝固浴浓度、凝固时间及塑化条件对膜力学性能的影响。结果表明：在一定范围内，随着制膜液中细菌纤维素浓度的增加、凝固浴温度的降低和凝固浴浓度的增大，膜的拉伸强度和伸长率均提高；随着甘油浓度的增大和塑化时间的延长，膜的拉伸强度逐渐减小，伸长率逐渐增大。

英文摘要：

Bacterial cellulose membranes were prepared by phase inversion method using bacterial cellulose as material and lithium chloride/dimethylacetamide as solvent. The tensile strength and elongation of membranes were determined by a monofilament tensile testing machine. The effects of bacterial cellulose concentration coagulation bath temperature, coagulation bath concentration and coagulation time on mechanical properties of membranes were investigated. Results show that the membrane mechanical property improves with the increase of the bacterial cellulose concentration, the decrease of coagulation bath temperature and the increase of coagulation bath concentration. With the increasing of the glycerol concentration and prolonged plasticizing time, the elongation of membrane improves, while the tensile strength decreases.