MWCNTs含量对纤维素/[BMIM]Cl溶液及其纤维性能和形态结构的影响  

Effect of the MWCNTs Content on the Properties and Structures of Cellulose/[BMIM]Cl Solutions and Resultant Fibers

作　　者：陈桃[1] 蔡涛 张慧慧[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：《纤维素科学与技术》2010年第3期21-27,共7页Journal of Cellulose Science and Technology

基　　金：国家自然科学基金项目(批准号:50873024);高等学校学科创新引智计划项目(No.111-2-04)

摘　　要：分析了经表面功能化的MWCNTs(多壁碳纳米管)在纤维素/[BMIM]Cl(1-丁基-3-甲基咪唑氯盐)体系中的分散稳定性,探讨了MWCNTs/纤维素/[BMIM]Cl溶液的流变行为,并通过干湿法制备了不同MWCNTs含量的离子液体法纤维素纤维,对其力学性能和表面形态结构进行了研究。结果表明:MWCNTs/纤维素/[BMIM]Cl溶液为切力变稀流体。随着溶液中MWCNTs添加量的增加,溶液表观黏度先增大后减小;适量的MWCNTs可以均匀分散在纤维素/[BMIM]Cl溶液体系中并具有良好的可纺性,所制得的MWCNTs/纤维素纤维表面较光滑且力学性能明显改善。其中,含1%MWCNTs的纤维素纤维的初始模量和断裂强度较高,分别比未添加MWCNTs的纤维提高66.7%和22.7%。In this work,the dispersion stability of modified multi-walled carbon nanotubes（MWCNTs） in the cellulose/[BMIM]Cl system was investigated.And the rheological behavior of MWCNTs/cellulose/[BMIM]Cl solutions was also studied.In addition,the cellulose fibers containing different contents of MWCNTs were prepared by the dry-jet wet spinning process and the mechanical properties and structure of MWCNTs/cellulose fibers were investigated.The results showed that the cellulose/[BMIM]Cl solution filled with MWCNTs belong to the typical shear thinning fluid.The apparent viscosity of the solution was increased firstly with the addition of MWCNTs,and then decreased obviously with the further addition of MWCNTs.An appropriate amount of MWCNTs could be dispersed uniformly in the cellulose/[BMIM]Cl solutions and the mechanical properties of the resultant composite fiber were improved.Compared with the fiber without MWCNTs,the modulus and tenacity of the composite fiber containing 1% MWCNTs were increased by 66.7% and 22.7%,respectively.

关 键 词：纤维素 离子液体 碳纳米管 分散 纤维 

分 类 号：O636.11[理学—高分子化学]