Preparation and characterization of ribbon-shaped mesophase pitch-based carbon fibers with different crystal orientations

Xiao Qing Xiong, Guan Ming Yuan, Xuan Ke Li*, Zhi Jun Dong, Zhong Wei Zhang, Jun Shan Wang

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

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摘要

Using mesophase pitch as the raw material, with the rectangular-section spinnerets at different aspect ratios (length divided by width), ribbon-shaped mesophase pitch-based carbon fibers with various cross-section sizes and crystal orientations were prepared by adjusting the spinning rate. Effects of the heat-treatment temperature and aspect ratio of spinnerets on structure and properties of the ribbon-shaped carbon fibers were investigated. The results show that the aspect ratio of spinneret and the spinning rate of pitch fibers have a significant influence on the crystal orientation of carbon fibers. Within the specified spinning rate of pitch fibers, the crystal orientation of carbon fibers varies from a parallel-fold structure to a vertical-radial structure with the decrease of the aspect ratio of the spinnerets. The electrical conductivity and the mechanical property of ribbon-shaped carbon fibers significantly increase with the increase of heat-treatment temperature. With increase in spinning rate, there is no obvious change in the room-temperature axial electrical resistivity along the longitudinal direction of fiber, whereas obvious changes in the mechanical property are observed. At 30:1 of the aspect ratio of the spinneret and 75 m/min of spinning rate, the tensile strength and young's modulus of the graphite fibers heat-treated at 2500℃ are up to 2.53 GPa and 234.77 GPa, respectively.

源语言英语
页(从-至)1186-1192
页数7
期刊Wuji Cailiao Xuebao/Journal of Inorganic Materials
29
11
DOI
出版状态已出版 - 1 11月 2014
已对外发布

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Xiong, X. Q., Yuan, G. M., Li, X. K., Dong, Z. J., Zhang, Z. W., & Wang, J. S. (2014). Preparation and characterization of ribbon-shaped mesophase pitch-based carbon fibers with different crystal orientations. Wuji Cailiao Xuebao/Journal of Inorganic Materials, 29(11), 1186-1192. https://doi.org/10.15541/jim20140101