李昭锐,李常清,王建彬,张琨,徐樑华

• 1:北京化工大学国家碳纤维工程技术研究中心

摘要(Abstract)：

提出了制备渗铁PAN碳纤维的一种新方法,研究了铁元素对碳纤维热行为的影响,探讨了铁元素对碳纤维热行为影响机理。结果表明,在初生纤维上浸渍Fe2(SO4)3/DMSO溶液的方法制备得到的PAN碳纤维中元素铁含量在0.26%以上,其在纤维截面上分布均匀。铁元素对碳纤维热稳定性影响与碳纤维经历的热历史有关,在1700℃以上热处理过的渗铁碳纤维热稳定性较之2200℃热处理过的碳纤维热稳定性高。同时,铁元素对碳纤维热稳定性表现出浓度效应,碳纤维中铁浓度在49μg/g以上时,碳纤维耐热氧化能力随铁元素浓度的升高而降低。研究还表明,铁元素能降低了PAN碳纤维表面C1s费米能级,从而提高了碳纤维耐热氧化性。

关键词(KeyWords)： 碳纤维;热稳定性;铁;浓度效应;费米能级

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划资助项目(2011CB605602)

作者(Author): 李昭锐,李常清,王建彬,张琨,徐樑华

DOI: 10.13289/j.issn.1009-6264.2013.03.007

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