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	Study on the skin-core evolvement of carbon fibers as a function of heat treatment temperature by raman spectroscopy
	Liu Fu-jie1,2; Fan Li-dong1; Wang Hao-jing1; Zhu Zhen-ping1
刊名	Spectroscopy and spectral analysis
	2008-08-01
卷号	28期号:8页码:1819-1822
关键词	Carbon fibers Skin-core structure Raman spectroscopy Heat treatment temperature
ISSN号	1000-0593
通讯作者	Wang hao-jing(hjwang@sxicc.ac.cn)
英文摘要	The skin-core evolvement of the carbon fibers was studied as a function of heat-treatment temperature though the analysis of raman spectroscopy of the carbon fibers surface and core. it was found that the change of the raman spectra of the carbon fibers core was similar to that on the surface with the increase in heat-treatment temperature. at 1 600 degrees c, the r. and r, values were almost equal, indicating that the degrees of the graphitization of the carbon fibers surface and core were almost uniform. the r, and r, values decreased dramatically with the increase in heat-treatment temperature, and r, decreased more. at 2 800 degrees c, the r. value came to 0. 429, lowered 77.2%, while the r. value then came to 1.101, lowered 38.7% only. it implied that the graphitization degree of the carbon fibers was enhanced with increasing the heat treatment temperature, and that of carbon fibers surface was enhanced more. the graphite characters of the carbon of the carbon fibers surface were different from that of the carbon fibers core. the former is close to soft carbon, which is easy to graphitize, while the latter is close to hard carbon, which is difficult to graphitize, and it may be resin carbon. skin-core structure gene r-sc (=r-s/r-c) which denoted the skin-core degree of the carbon fibers was first brought forward and adopted. the r. value is between 0 and 1. when the r. value is equal to 1, the carbon fibers are homogenous. when the r. value is close to zero, there are serious skin-core structures in the carbon fibers. the r. value reduced linearly with the increase in heat-treatment temperature, indicating that the homogeneous degrees of the carbon fibers decreased and the skin-core degrees of the carbon fibers increased. the crystallite size of the carbon fibers surface and core increased gradually with the increase in heat-treatment temperaturet but the surface's increased more quickly, indicating that the carbon of the carbon fibers surface was easier to graphitize than the carbon fibers core. serious skin-core structure was one of the reasons that caused the reducing of the carbon fibers' tensile strength.
WOS关键词	NANOTUBES ; SPECTRA
WOS研究方向	Spectroscopy
WOS类目	Spectroscopy
语种	英语
出版者	BEIJING UNIV PRESS
WOS记录号	WOS:000258968500030
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2393251
专题	中国科学院大学
通讯作者	Wang Hao-jing
作者单位	1.Chinese Acad Sci, Inst Coal Chem, Key Lab Carbon Mat, Taiyuan 030001, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Liu Fu-jie,Fan Li-dong,Wang Hao-jing,et al. Study on the skin-core evolvement of carbon fibers as a function of heat treatment temperature by raman spectroscopy[J]. Spectroscopy and spectral analysis,2008,28(8):1819-1822.
APA	Liu Fu-jie,Fan Li-dong,Wang Hao-jing,&Zhu Zhen-ping.(2008).Study on the skin-core evolvement of carbon fibers as a function of heat treatment temperature by raman spectroscopy.Spectroscopy and spectral analysis,28(8),1819-1822.
MLA	Liu Fu-jie,et al."Study on the skin-core evolvement of carbon fibers as a function of heat treatment temperature by raman spectroscopy".Spectroscopy and spectral analysis 28.8(2008):1819-1822.

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