董艳,张清华,李静,夏清明,陈大俊
DONG Yan, ZHANG Qing-hua, LI Jing, XIA Qing-ming, CHEN Da-jun (State Key Laboratory for Modification of Chemical Fibers and Polymer Materials

• 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
• 2:东华大学材料科学与工程学院
• 3:纤维材料改性国家重点实验室
• 4:东华大学材料科学与工程学院

摘要(Abstract)：

碳纳米管经表面改性后与聚丙烯腈溶液共混制备了纺丝浆液,采用湿法纺丝技术制备了聚丙烯腈/多壁碳纳米管(PAN/MWNT)共混纤维。研究了碳纳米管对共混溶液动态流变性能的影响,探讨了共混纤维的物理机械性能和结晶特性。结果表明:MWNTs的加入降低了纺丝原液的黏度,明显提高了共混纤维的力学性能,降低了延伸率,并对纤维的结晶度有一定的影响。
Multiwall carbon nanotubes(MWNTs)were modified by strong acid and then blended with modified MWNTs and polyacrylonitrile(PAN)in dimethyl acetamide (DMAc). The dynamic rheological behavior of the blending solution was investigated. The results indicated that the addition of MWNT in the PAN/DMAc solution reduced the complex viscosity of the solution. Wet spinning technology was employed to produce the composite fibers of PAN/MWNT. The measurement of mechanical properties showed that the addition of MWNTs resulted in an increase of tensile of the composite fibers and a decrease of elongation at the break. X-ray diffraction was used to characterize the crystalline properties of the fibers, exhibiting an increasing crystallinity of the composite fibers.

关键词(KeyWords)： 多壁碳纳米管;聚丙烯腈;湿法纺丝;共混纤维
multiwall carbon nanotubes, polyacrylonitrle, wet spinning, composite fiber

Abstract:

Keywords:

基金项目(Foundation): 国家863计划项目(2005AA302H30);; 教育部新世纪优秀人才计划项目(NCET-06-0421);; 上海市启明星跟踪计划项目(06Q14001)

作者(Author): 董艳,张清华,李静,夏清明,陈大俊
DONG Yan, ZHANG Qing-hua, LI Jing, XIA Qing-ming, CHEN Da-jun (State Key Laboratory for Modification of Chemical Fibers and Polymer Materials

参考文献(References)：

• [1]Coleman J N,Khan U,et al.Small but strong:A review of the mechanical properties of carbon nanotube-polymer composites[J].Carbon,2006,44(9):1624-1652.
• [2]Sreekumar T V,Liu T,et al.Polyacrylonitrile single-walled carbon nanotube composite fibers[J].Adv Mater,2004,16(1):58-61.
• [3]潘玮,张慧勤等.碳纳米管/聚丙烯腈导电纤维的结构与性能[J].合成纤维,2006,35(10):1-3,8.
• [4]王新鹏,梁琳俐等.UHMWPE/CNTs冻胶体系的流变行为研究[J].合成技术及应用,2005,20(2):11-14.
• [5]Zhang Q,Rastogi S,et al.Low percolation threshold in single walled carbon nanotube/high density polyethylene composites prepared by melt processing technique[J].Carbon,2006,44(4):778-785.
• [6]Koganemaru A,Matsuo M,et al.Composites of polyacrylonitrile and mutiwalled carbon nanotubes prepared by gelation/crystallization from solution[J].Adv Funct Mater,2004,14(9):842-850.