文档介绍：
同轴电纺法制备纳米空心碳纤维#
王登政,杨颖,刘瑛岩**
(清华大学电机系)
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摘要:高压静电纺丝是目前高电压技术中新兴的一个研究领域。其基本原理是高分子溶液在
静电力的作用下产生弯曲失稳而被拉伸形成微纳米纤维。同轴电纺技术是对常规静电纺丝的
一个改进,可用于制备复合或空心微纳米纤维。本文采用同轴电纺法制备了纳米空心碳纤维,
讨论了溶液浓度、界面张力等对纤维形貌的影响,表征了核-壳空心结构对碳纤维晶体结构
的影响。试验结果表明,较高的壳溶液浓度以及壳溶液与核溶液之间较低的界面张力有利与
电纺过程中同轴复合纤维的形成。空心碳纤维的晶体结构与传统实心碳纤维相比无明显差
异。
关键词:静电纺丝;同轴电纺;空心碳纤维;核-壳结构
中图分类号:
Fabrication of Hollow Carbon Fibers through Coaxial
Electrospinning
WANG Dengzheng, YANG ying, LIU yingyan
(Dept. of Electrical Engineering, Tsinghua Univ)
Abstract: Electrospinning technique is an emerging research area in High-voltage technology. Its basic
principle is polymer solution’s bending instability caused by electrostatic force generated by
high-voltage power source. Coaxial electrospinning technique is an improvement over conventional
electrospinning, which could be used to posite or hollow fiber. In this study, hollow
carbon nano-fibers are fabricated by coaxial electrospinning. The effect of shell solution’s
concentration and interfacial tension between shell solution and core solution on fibers’ morpology is
discussed. The influence of hollow structure on the fiber’s crystal structure is investigated. The results
show that higher shell concentration and lower interfacial tension between shell solution and core
solution favors the formation of core-shell structure during the process o