Ningbo Institute of Materials Research progresses on high-strength high-modulus carbon fiber

Recently, the Ningbo Institute of Materials Technology and Engineering of the Chinese Academy of Sciences has made important progress in the research of key high-strength and high-modulus carbon fiber preparation technologies. High-strength and high-modulus carbon fibers with a tensile strength of 5.24 GPa and a tensile modulus of 593 GPa have been prepared to realize the key preparation of domestic M60J. Technical breakthroughs.

In January 2016, Ningbo Materials took the lead in domestically to achieve a major breakthrough in domestic M55J preparation technology. In September of the same year, the preparation technology was verified and high-strength high-modulus carbon fibers with tensile strength of 4.15 GPa and tensile modulus of 585 GPa were obtained. The continuous and stable production of domestic high-strength high-modulus carbon fiber M55J was realized, and the inter-batch dispersion coefficient of fiber bulk performance was <5%. Subsequently, Ningbo Materials Institute conducted a detailed study on the process analysis, structural studies, and performance optimization of domestic high-strength high-modulus carbon fibers, especially focusing on the study of tensile strength retention of carbon fibers in high-temperature graphitization environments. The recent successful preparation of tensile strength was 5.24GPa. High-strength and high-modulus carbon fibers with a tensile modulus of 593 GPa, compared with Japan Toray M60J high-strength high-modulus carbon fibers (tensile strength 3.92 GPa, tensile modulus 588 GPa), continue to maintain its tensile strength advantage.

High-strength high-modulus carbon fiber has many advantages such as high tensile modulus, small thermal expansion coefficient and dimensional stability, and it has become a key raw material in spacecraft, aerospace and other fields relying on its unique structure and performance advantages. In recent years, domestic high-strength high-modulus carbon fiber has developed rapidly. Ningbo Institute of Materials and Beijing University of Chemical Technology have successively broken through the domestically produced M55J high-strength high-modulus carbon fiber preparation technology. Some domestic companies have also conducted M55J engineering technology research. The breakthrough in the key preparation technology of domestic high-strength high-modulus carbon fiber M60J made by Ningbo Materials will effectively promote the development of technology in this field in China.

While carrying out the domestic series of high-strength and high-modulus carbon fiber technology breakthroughs and stabilizing preparation, Ningbo Materials Institute has established a good cooperative relationship with domestic carbon fiber and upstream and downstream companies of composite materials, and developed domestic M55J grade carbon fiber prepreg preparation and composite material properties. Evaluation work, and will carry out work such as component evaluation and verification. The relevant research team will also further develop domestic M60J-grade high-strength and high-modulus carbon fiber stabilization preparation technologies based on the evaluation of domestic M55J-class high-strength and high-modulus carbon fiber applications, work closely with domestic carbon fiber-dominant enterprises, and actively carry out research, production and research cooperation to support related tasks. development of.