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高电压技术 2015

同轴电纺法制备纳米空心碳纤维

DOI: 10.13336/j.1003-6520.hve.2015.02.007, PP. 403-409

刘瑛岩,王登政,杨颖

Keywords: 电纺丝,同轴电纺,同轴复合纤维,空心碳纤维,晶体结构,聚酰亚胺

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Abstract:

高压静电纺丝的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改进,可用于制备复合或空心微纳米纤维。为制备纳米空心碳纤维,利用同轴电纺法进行了实验,讨论了溶液质量分数、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。实验结果表明较高的壳溶液质量分数以及壳溶液与核溶液之间较低的界面张力有利于电纺过程中同轴复合纤维的形成;获得的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。

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