碳纤维在石墨化处理过程中的sp2 结构转变

碳纤维在石墨化处理过程中的sp2 结构转变
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作者单位:北京化工大学
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Transition of sp2 Hybridization Structure During Graphitization of Carbon Fiber

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摘要:

利用激光拉曼光谱的方法,研究了国产PAN 基碳纤维CCF300 在石墨化过程中碳化学结构的变

化规律。通过对散射谱图进行分峰分析,根据不同振动峰的归属,提出了sp2结构转化度琢,即

IG +IC

这一表征纤

维由碳纤维向石墨材料转变进程的结构参数。结果表明:随着处理温度的不断升高,纤维中的无序碳结构逐渐

减少,在1 700益之前sp3杂化向sp2杂化结构转变的速率较快;在1 700益之后,转变速率明显变慢,逐步形成了

最终石墨纤维的规整六元环结构基础。

Abstract:

In present study, the evolution of sp2 hybridization for CCF300 carbon fiber during the heat treatment

process was studied by Raman spectroscopy. The transition from sp3 to sp2 hybridization was traced by the method of

deconvolution for Raman scattering curves. The parameter which can be used to trace the graphitization was defined as

琢,namely IG

IG +IC. The results indicated that with the increasing of the heat treatment temperature, the amount of amor鄄

phous carbon decreased gradually. Before 1 700益, the rate of transition to sp2 hybridization structure is more rapid.

After 1 700益, however, this rate had slowed down dramatically and the pseudo鄄graphitic structure is formed gradually

after the transition to sp2 hybridization structure.

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引证文献

陈旺.碳纤维在石墨化处理过程中的sp2 结构转变[J].宇航材料工艺,2013,43(5).

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