1-乙基-3-甲基咪唑醋酸盐溶剂小间隙干湿纺纤维素纤维的结构与性能  

Structure and properties of cellulose fibers from 1-ethyl-3-methylimidazolium acetate by dry-wet spinning with small gap

作　　者：李晓俊[1,2] 李念珂[2] 徐纪刚[2] 段先泉[2] 孙玉山[2] 赵强[1,2] 

机构地区：[1]东华大学纺织学院,上海201620 [2]中国纺织科学研究院生物源纤维制造技术国家重点实验室,北京100025

出　　处：《纺织学报》2014年第5期1-6,共6页Journal of Textile Research

基　　金：国家重点基础研究发展计划(973计划)项目(2012CB724610)

摘　　要：通过1-乙基-3-甲基咪唑醋酸盐([EMIM]Ac)溶剂小间隙下的干湿法纺丝,制备了不同间隙和牵伸速率条件下的纤维素纤维;采用密度梯度法、压汞法、广角X射线衍射(WAXD)、双折射、纤度强伸联用仪和湿摩擦等方法,对纤维素纤维的结构与力学性能进行表征。结果表明:采用密度法测量的纤维素纤维的密度和结晶度准确性高,采用WAXD法测量的结晶度适用于相对比较;所得纤维结构致密;在小间隙纺丝条件下,增加间隙有利于原液细流内应力的松弛,适当提高牵伸速率,有利于纤维结晶度、取向度的提高,所得纤维的物理机械性能较好。Cellulose fibers were prepared from cellulose/1-ethyl-3-methylimidazolium acetate（[EMIM]Ac） solution by dry-wet spinning with different small gaps and drawing speeds. Density gradient tubes, mercury porosimetry, wide angle X-ray diffraction（WAXD）, birefringent, tensile-fineness tester and wet friction were utilized to characterize the structure and mechanical properties. The results showed that density gradient tubes and mercury porosimetry were accurate methods for testing of density and crystallinity of cellulose fibers. WAXD was suitable for relative comparison of crystallinity. Fibers tested were dense. Under small gap condition, increasing gap was in favor of the relaxation of internal stress of spinning solution, properly increasing drawing speed was in favor of the orientation and crystallinity of fibers, which led to better mechanical properties of fibers.

关 键 词：1-乙基-3-甲基咪唑醋酸盐 小间隙 干湿纺 纤维素 取向 

分 类 号：TQ341.9[化学工程—化纤工业]