Formation of mesophase from the components of high temperature coal tar pitch

XU Lei; WANG Xiang-jun; YANG Tao; CHI Yong-qing; SONG Yan; SONG Huai-he; LIU Zhan-jun

doi:10.19869/j.ncm.1007-8827.20190161

Volume 35 Issue 5

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Article Navigation > New Carbon Mater. > 2020 > 35(5): 599-608

XU Lei, WANG Xiang-jun, YANG Tao, CHI Yong-qing, SONG Yan, SONG Huai-he, LIU Zhan-jun. Formation of mesophase from the components of high temperature coal tar pitch. New Carbon Mater., 2020, 35(5): 599-608. doi: 10.19869/j.ncm.1007-8827.20190161

Citation:

XU Lei, WANG Xiang-jun, YANG Tao, CHI Yong-qing, SONG Yan, SONG Huai-he, LIU Zhan-jun. Formation of mesophase from the components of high temperature coal tar pitch. New Carbon Mater., 2020, 35(5): 599-608. doi: 10.19869/j.ncm.1007-8827.20190161

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Formation of mesophase from the components of high temperature coal tar pitch

doi: 10.19869/j.ncm.1007-8827.20190161

1.
Taiyuan University of Science and Technology, Taiyuan 030024, China;
2.
Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Science, Taiyuan 030001, China;
3.
University of Chinese Academy of Science, Center of Materials Science and Optoelectronics Engineering, Beijing 100049, China;
4.
State Key Laboratory of Chemical Resource Utilization, Beijing University of Chemical Technology, Beijing 100029, China

Funds: National Natural Science Foundation of China (U1610252).

Received Date: 2019-12-04
Rev Recd Date: 2020-02-10
Publish Date: 2020-10-28

Abstract

Abstract

High temperature coal tar pitch was extracted with n-hexane, toluene and pyridine to produce a N-heptane-soluble component (HS), a N-heptane insoluble-toluene soluble component (HI-TS), a toluene insoluble-pyridine soluble component (TI-PS) and a pyridine insoluble component (PI). Mesophase pitch was prepared by direct thermal polycondensation using HS, HI-TS, TI-PS as the raw materials. Polarizing microscopy was used to observe the microstructure of the three mesophases, and their contents were measured by extracting thermal polycondensation products with tetrahydrofuran. Results showed that with increasing reaction temperature from 400℃ to 460℃, the HS tends to form mesophase pitch with larger anisotropic domains while the HI-TS and TI-PS produce flow-textured and mosaic structures with mesophase contents above 90%.
- Component of coal pitch,
- Coal tar pith,
- Optical structure,
- Mesophase content

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References(28)

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