Polyacrylonitrile-based carbon fiber as well as preparation method and application thereof
By performing multi-step carbonization and graphitization on polyacrylonitrile-based fibers, polyacrylonitrile-based carbon fibers with high tensile modulus and high tensile strength were prepared, which solved the problem that existing carbon fiber materials could not achieve high modulus and high strength at the same time, and achieved its wide application in composite materials.
CN119753892APending Publication Date: 2025-04-04CHANGCHUN UNIV OF TECH
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Patent Information
- Application Number
- CN202510015281.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-04-04
AI Technical Summary
Technical Problem
The existing carbon fiber materials cannot achieve high tensile modulus and high tensile strength at the same time, limiting their application in composite materials.
Method used
By performing multi-step treatment of pre-oxidation, low-temperature carbonization, alkali leaching, high-temperature carbonization and graphitization of the polyacrylonitrile-based fibers, polyacrylonitrile-based carbon fibers with tensile modulus of 200 to 590 GPa were prepared.
Benefits of technology
The tensile modulus and tensile strength of carbon fiber are improved, making it suitable for scenarios with high mechanical performance requirements, such as aerospace, automotive materials, sports equipment and wind power generation.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention belongs to the technical field of carbon fibers, and particularly relates to polyacrylonitrile-based carbon fibers as well as a preparation method and application thereof. According to the preparation method provided by the invention, the tensile modulus of the polyacrylonitrile-based carbon fiber is improved, the tensile modulus of the polyacrylonitrile-based carbon fiber is 200-590 GPa, and the tensile strength of the polyacrylonitrile-based carbon fiber is 2.4 GPa or above. Through gasification reaction of the metal catalyst, formation of a graphite-like structure of the carbon fiber and improvement of regularity of the carbon fiber are promoted, elements except carbon elements are removed, through low-temperature graphitization, a graphite layer plane is further oriented along a fiber axis, the rigidity of a molecular chain is increased, and the modulus is improved; and meanwhile, the problems of large broken filament amount and high energy consumption during graphitization of the carbon fibers are effectively relieved. The polyacrylonitrile-based carbon fiber provided by the invention has high tensile modulus, is suitable for occasions with high mechanical property requirements, such as aerospace, automobile materials, sports equipment or wind power generation, and has wide application prospects.
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