China University of Petroleum

Yonggang Cao

Jun Li

Jianguo Zhang

Dong Liu

Hui Du

Fushan Wen

Changlong Yin

Zhihao Li

Xiujie Yang

Zhaojun Chen

Xin Gong

Nan Shi

Bin Lou

Huizhi Yuan

Zhiqing Ma

Chong Jiao

Luning Chai

Zhichen Zhang

Enqiang Yu

Yu'e Fu

Preparation methods of a high modulus carbon fiber (HMCF) and a precursor (mesophase pitch (MP)) thereof are provided. The preparation method of MP includes: separating components with a molecular weight distribution (MWD) of 400 to 1,000 from a heavy oil raw material through size-exclusion chromatography (SEC); subjecting the components to ion-exchange chromatography (IEC) to obtain modified feedstock oil, where, the components are passed through macroporous cation-exchange and anion-exchange resins in sequence to remove acidic and alkaline components; and subjecting the modified feedstock oil to thermal polycondensation and carbonization to obtain high-quality MP with prominent spinnability. With high mesophase content, low softening point, low viscosity, and prominent meltability and spinnability, the obtained MP is a high-quality raw material for preparing HMCFs. The obtained MP can be subjected to melt spinning, pre-oxidation, carbonization, and graphitization to obtain an MP-based HMCF.

Preparation methods of high modulus carbon fiber (HMCF) and precursor (mesophase pitch (MP)) thereof

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Yonggang Cao