浆粕性质对纤维素/[Bmim]Cl纺丝原液性能的影响  

Effect of pulp characteristics on properties of cellulose/[Bmim]Cl spinning dope

作　　者：张慧慧[1] 蔡涛 周振兴[1] 邵惠丽[1] 胡学超[1] 

机构地区：[1]东华大学材料科学与工程学院纤维材料改性国家重点实验室,上海201620

出　　处：《合成纤维工业》2011年第5期8-10,共3页China Synthetic Fiber Industry

基　　金：国家自然科学基金项目(50903015和50873024);863计划项目(2009AA03Z425);高等学校学科创新引智计划项目(111-2-04)

摘　　要：选用棉浆和木浆3种纤维素浆粕为原料,以离子液体1-丁基-3-甲基咪唑氯盐([Bmim]C1)为溶剂,探讨了浆粕的聚合度(DP)和α-纤维素含量对其在[Bmim]Cl中的溶解情况、纺丝液的流变行为及其纤维性能的影响。结果表明:浆粕的DP和α-纤维素含量越高,其在[Bmim]Cl中完全溶解所需时间就越长;相对于α-纤维素含量而言,Dp对浆粕溶解速率的影响为主要因素;3种纤维素/[Bmim]Cl纺丝液都属于切力变稀流体,由高DP和高α-纤维素含量的浆粕所制得的纺丝液的结构粘度指数大且粘流活化能高;高DP和高α-纤维素含量的浆粕有利于获得力学性能更好的纤维素纤维。Using three kinds of cotton and wood cellulose pulps as raw material and the ionic liquid of 1-butyl-3-methylimidazolium chloride（[Bmim]Cl） as solvent,the effect of the degree of polymerization（DP） andα-cellulose content of pulps on the cellulose dissolution in[Bmim]Cl,the rheological behavior of the spinning dope and the properties of the resulted fibers were discussed.The results showed that the higher the DP andα-cellulose content of cellulose pulp,the longer the dissolution time of cellulose in[Bmim]Cl.The DP of pulp was the dominating factor on the dissolution rate of cellulose in[Bmim]Cl as compared withα-cellulose content.Three kinds of cellulose/[Bmim]Cl spinning dopes belonged to the typical shear thinning fluids.High DP and highα- cellulose content of the pulp contributed high structural viscosity index and viscous flow activation energy to the spinning dope.The pulp with high DP and highα- cellulose content helped to prepare the fiber with high mechanical properties.

关 键 词：纤维素浆粕 1-丁基-3-甲基咪唑氯盐 聚合度 Α-纤维素 流变性能 力学性能 

分 类 号：TQ352.79[化学工程]