Citation: Wei-wei Li, Kang Hong-liangKang, Jian Xu, Rui-gang Liu. Effects of Ultra-high Temperature Treatment on the Microstructure of Carbon Fibers[J]. Chinese Journal of Polymer Science, ;2017, 35(6): 764-772. doi: 10.1007/s10118-017-1922-9 shu

Effects of Ultra-high Temperature Treatment on the Microstructure of Carbon Fibers

a.
Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
b.
University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: Jian Xu, jxu@iccas.ac.cn Rui-gang Liu, rgliu@iccas.ac.cn
Received Date: 18 September 2016
Revised Date: 30 November 2016
Accepted Date: 2 December 2016

Fund Project: This work was financially supported by the National High Technology Research and Development Program of China 863 Program, No. 2015AA03A204

The microcrystalline structure and microvoid structure in carbon fibers during graphitization process (2300-2700 ℃) were characterized employing laser micro-Raman scattering (Raman), X-ray diffraction (XRD), small angle X-ray scattering (SAXS), and high-resolution transmission electron microscopy (HR-TEM). The crystalline sizes (L_a, L_c) increased and interlayer spacing (d₀₀₂) decreased with increasing heat treatment temperature (HTT). The microvoids in the fibers grew up and contacted to the neighbors with the development of microcrystalline. In addition, the preferred orientation of graphite crystallite along fiber axis decreased and microvoids increased. The results are crucial for analyzing the evolution of microstructure of carbon fibers in the process of heat treatment and important for the preparation of high strength and high modulus carbon fibers.
- Carbon fibers,
- Graphitization,
- Microcrystalline structure,
- Microvoid structure
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沈阳化工大学材料科学与工程学院沈阳 110142