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

US11149361B1 · kind B1 · utility

Assignee

• China University of Petroleum · CN

Inventors

• Dong Hui Liu · Beijing, CN
• Xin Gong · Qingdao, CN
• Bin Lou · Qingdao, CN
• Jun Li · Norwood, US
• Zhihao Li · Qingdao, CN
• Nan Shi · Newark, US
• Fushan Wen · Qingdao, CN
• Hui Du · Golden, US
• Zhaojun Chen · Qingdao, CN
• Changlong Yin · Qingdao, CN
• Xiujie Yang · Qingdao, CN
• Luning Chai · Jinan, CN
• Zhichen Zhang · Beijing, CN
• Enqiang Yu · Qingdao, CN
• Yu'e Fu · Qingdao, CN
• Huizhi Yuan · Qingdao, CN
• Jianguo Zhang · Dizhai, CN
• Zhiqing Ma · Qingdao, CN
• Chong Jiao · Beijing, CN
• Yonggang CAO · Beijing, CN

Key dates

• Filing date: May 10, 2021
• Grant date: Oct 19, 2021
• Expiry date: May 10, 2041

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D10B2101/12
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

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.