The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 15, 2024
Filed:
Mar. 05, 2021
Tiangong University, Tianjin, CN;
Hi-tech Fiber Group Corporation, Beijing, CN;
Na Han, Tianjin, CN;
Chao Wu, Tianjin, CN;
Xingxiang Zhang, Tianjin, CN;
Lejun Wang, Tianjin, CN;
Jianyong Chen, Tianjin, CN;
Zhiheng Sun, Tianjin, CN;
Xujian Yang, Tianjin, CN;
Jun Cai, Tianjin, CN;
Tiangong University, Tianjin, CN;
HI- TECH FIBER GROUP CORPORATION, Beijing, CN;
Abstract
A method of preparing PAN-based carbon fibers relates to the technical field of materials. The method includes: S1. acrylonitrile, a second monomer and an unsaturated UV-sensitive cross-linking agent are mixed, an initiator is then added and a reaction is performed to obtain a meltable PAN-based copolymer; S2. the meltable PAN-based copolymer and a flow modifier are mixed to obtain a mixture, the mixture is extruded and pelletized, and then melt spinning is performed to obtain nascent fibers, the nascent fibers are stretched and annealed to obtain a PAN-based carbon fiber precursor; S3. ultraviolet irradiation is performed on the PAN-based carbon fiber precursor; S4. the PAN-based carbon fiber precursor after ultraviolet irradiation is pre-oxidized and carbonized to obtain PAN-based carbon fibers.