Preparation of pitch precursor with excellent spinnability for general-purpose carbon fibre using coal tar pitch as raw material

doi:10.1016/j.cjche.2022.01.003

中国化学工程学报 ›› 2023, Vol. 54 ›› Issue (2): 22-28.DOI: 10.1016/j.cjche.2022.01.003

• Full Length Article • 上一篇下一篇

Preparation of pitch precursor with excellent spinnability for general-purpose carbon fibre using coal tar pitch as raw material

Jinchang Liu, Chenyang Shen, Lujie Huang, Tinghao Fang, Yaping Li, Dingcheng Liang, Qiang Xie

School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China

收稿日期:2021-10-09 修回日期:2022-01-05 出版日期:2023-02-28 发布日期:2023-05-11
通讯作者: Jinchang Liu,E-mail:liujinchang@cumtb.edu.cn
基金资助:
The authors gratefully acknowledge the financial support provided by the National Natural Science Foundation of China (22008254), the Fundamental Research Funds for the Central Universities (2020XJHH01), the National Training Program of Innovation and Entrepreneurship for Undergraduates (C202003309), and China University of Mining and Technology (Beijing) Yueqi Outstanding Scholar Project (2020JCB02).

Preparation of pitch precursor with excellent spinnability for general-purpose carbon fibre using coal tar pitch as raw material

Jinchang Liu, Chenyang Shen, Lujie Huang, Tinghao Fang, Yaping Li, Dingcheng Liang, Qiang Xie

School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China

Received:2021-10-09 Revised:2022-01-05 Online:2023-02-28 Published:2023-05-11
Contact: Jinchang Liu,E-mail:liujinchang@cumtb.edu.cn
Supported by:
The authors gratefully acknowledge the financial support provided by the National Natural Science Foundation of China (22008254), the Fundamental Research Funds for the Central Universities (2020XJHH01), the National Training Program of Innovation and Entrepreneurship for Undergraduates (C202003309), and China University of Mining and Technology (Beijing) Yueqi Outstanding Scholar Project (2020JCB02).

摘要/Abstract

摘要： Tetrahydrofuran (THF) extract of coal tar pitch (CTP) was used instead of blending CTP with pretreated pyrolysis fuel oil to prepare an isotropic pitch precursor with excellent spinnability for general-purpose carbon fibre through bromination–dehydrobromination. The feasibility and effectiveness of synthesising an isotropic pitch precursor derived from THF-soluble (CTP-THFs) is demonstrated in this study. The results show that CTP-THFs contains more light components than CTP; CTP-THFs and CTP monomer proportions were 62.52% and 45.32%, respectively. However, based on comparisons of CTP-THFsBr0 and CTPBr0 characterisations, CTP-THFs exhibits better polycondensation than CTP. Bromination–dehydrobromination promotes polycondensation of pitch precursors, leading to greater carbon aromaticity in CTP-THFsBr5, CTP-THFsBr10, and CTP-THFsBr15 than that in CTP-THFsBr0 and CTPBr0. CTP-THFsBr5 and CTP-THFsBr10 have excellent spinnability even with softening points as high as 230 ℃. The peri-condensed carbon and carbon aromaticity of CTP-THFsBr5 and CTP-THFsBr10 are high owing to the higher degree of polycondensation; however, they still possess a more linear molecular structure. The as-prepared carbon fibre exhibits homogeneity and uniformity, and the mechanical performance is comparable with that of commercial general-purpose carbon fibre products.

关键词: Carbon fibre, Isotropic pitch, Coal tar pitch (CTP), High spinnability, Bromination–dehydrobromination

Abstract: Tetrahydrofuran (THF) extract of coal tar pitch (CTP) was used instead of blending CTP with pretreated pyrolysis fuel oil to prepare an isotropic pitch precursor with excellent spinnability for general-purpose carbon fibre through bromination–dehydrobromination. The feasibility and effectiveness of synthesising an isotropic pitch precursor derived from THF-soluble (CTP-THFs) is demonstrated in this study. The results show that CTP-THFs contains more light components than CTP; CTP-THFs and CTP monomer proportions were 62.52% and 45.32%, respectively. However, based on comparisons of CTP-THFsBr0 and CTPBr0 characterisations, CTP-THFs exhibits better polycondensation than CTP. Bromination–dehydrobromination promotes polycondensation of pitch precursors, leading to greater carbon aromaticity in CTP-THFsBr5, CTP-THFsBr10, and CTP-THFsBr15 than that in CTP-THFsBr0 and CTPBr0. CTP-THFsBr5 and CTP-THFsBr10 have excellent spinnability even with softening points as high as 230 ℃. The peri-condensed carbon and carbon aromaticity of CTP-THFsBr5 and CTP-THFsBr10 are high owing to the higher degree of polycondensation; however, they still possess a more linear molecular structure. The as-prepared carbon fibre exhibits homogeneity and uniformity, and the mechanical performance is comparable with that of commercial general-purpose carbon fibre products.

Key words: Carbon fibre, Isotropic pitch, Coal tar pitch (CTP), High spinnability, Bromination–dehydrobromination

Jinchang Liu, Chenyang Shen, Lujie Huang, Tinghao Fang, Yaping Li, Dingcheng Liang, Qiang Xie. Preparation of pitch precursor with excellent spinnability for general-purpose carbon fibre using coal tar pitch as raw material[J]. 中国化学工程学报, 2023, 54(2): 22-28.

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Preparation of pitch precursor with excellent spinnability for general-purpose carbon fibre using coal tar pitch as raw material

Preparation of pitch precursor with excellent spinnability for general-purpose carbon fibre using coal tar pitch as raw material

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