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T300和T700炭纤维的结构与性能 被引量:47

Structure and properties of T300 and T700 carbon fibers
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摘要 利用SEM、元素分析、XRD和激光Raman光谱研究了T300和T700的形貌、化学组成和微观结构参数。结果发现:T700炭纤维表面光滑,而T300炭纤维的表面有大量的沟槽。表明前者是用干喷湿纺原丝,后者是用湿法纺丝原丝。两种纤维的断面均呈现出颗粒状特征。T700的含碳量高于T300,含氮量低于T300。两者的微观结构参数(d002、La和Lc)差异佐证了T700的炭化温度高于T300。T700的择优取向角Z比T300小2.3°,是石墨微晶致密有序排列的反映,因而使其体密度比T300高2.27%,空隙率低7.54%。所以致密化赋予了T700较高的拉伸强度。 The microstructures of T300 and T700 carbon fibers were investigated by scanning electron microscopy, elemental analysis, X-ray diffraction and Raman spectroscopy. Results showed that the surface of T700 was smooth, whereas ridge-like prominences and grooves were much more obvious on the surface of the T300 fibers, indicating that the former were produced by dry-jet wet spinning and the latter by wet spinning. Grain-like features were seen in the cross section areas of both fibers. T700 fibers had a higher carbon content and less nitrogen than did T300 fibers. The difference in microstructure parameters, such as d002 ,La and Lc, showed that the heat treatment temperature of T700 during manufacture was higher than that of T300. Compared with T300, the preferred orientation parameter Z of T700 fibers was 2.3° lower, the density 2.27 % higher and the microvoid volume 7.54 % less. Thus it is the densification that produces the higher tensile strength for T700 fibers.
出处 《新型炭材料》 SCIE EI CAS CSCD 北大核心 2007年第1期59-64,共6页 New Carbon Materials
基金 中国科学院知识创新工程重要方向项目(KGCX3-SWY-202)~~
关键词 PAN基炭纤维 微观结构 XRD RAMAN光谱 PAN-based carbon fiber Microstructure XRD Raman spectroscopy
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