More than 40 experts tell you what the future of carbon fiber and its composite materials are?

On April 13th, the “15th Textile Science and Technology New Insights Academic Salon” hosted by the China Textile Engineering Society and jointly organized by Tianjin University of Technology and the Editorial Committee of the Textile Journal was held in Beijing. The theme of this salon is " carbon fiber and its composite material preparation technology and application". It is aimed at carbon fiber and carbon fiber composite material preparation technology, development status and application, and has carried out cutting-edge exchanges from different perspectives of different disciplines, triggering the "production of academic and industrial circles". "Study and research" cooperation, in order to provide new ideas and new ideas for the preparation of carbon fiber and its composite materials and product development.

Academician of the Chinese Academy of Engineering Sun Jinliang, Yu Jianyong, Professor of Beijing University of Chemical Technology Xu Lianghua, and professor of Tianjin University of Technology Chen Li served as the leading scientist in the salon. Fu Guangwei, executive vice president of China Textile Engineering Society, Wei Junfu, executive vice president of Science and Technology Research Institute of Tianjin Polytechnic University, and more than 40 experts, scholars and representatives from the media, attended by academics, universities, research institutes and enterprises. This salon.

At the beginning of Sharon, Fu Guangwei, executive vice president of China Textile Engineering Society, said in his speech that the purpose of this salon is to explore the preparation technology and application of carbon fiber and its composite materials in China, and at the same time brainstorming to find the future development of China's carbon fiber and its composite materials industry. road. He believes that from fiber to composite materials, textiles participate in the whole process of the whole process, the textile industry should become the main body of carbon fiber composite materials, he hopes that experts and scientists outside the textile field can participate in, can support the development of textile disciplines, and finally The value is passed to the end user.

Wei Junfu, executive vice president of the Institute of Science and Technology of Tianjin Polytechnic University, said in his speech that the textile discipline of Tianjin Polytechnic University was founded in 1912 and has a history of more than one hundred years. It is an important pioneer and leader of China's textile higher education. one. High-performance fiber and textile composite preparation technology has always been one of the key research directions of Tianjin Polytechnic University. Tianjin University of Technology closely focuses on the major needs of the development of national strategic new materials , aiming at the application of high-performance composite materials, especially carbon fiber and its textiles. In the aspect of composite material preparation technology, since the 1980s, it has undertaken many national aerospace and defense military research tasks, focusing on solving the core scientific problems and key technical problems of advanced textile structural materials and resin-based composite materials. Models and satellites, Shenzhou spacecraft, rocket power systems, hypersonic vehicles have been applied for verification, making outstanding contributions to China's aerospace and defense industry. We hope to provide new insights and new ideas for technological innovation in the field of new technologies for carbon fiber and its composite materials through this academic salon event.

The morning salon was hosted by Xu Lianghua, a professor at Beijing University of Chemical Technology.

First of all, Yu Muhuo, a professor at Donghua University, gave a keynote speech titled “The Key Technologies and Development Trends of CFRP in Large-Scale Manufacturing Industry”, detailing the overall solution for cost-effective application of individual products, through raw silk production and oxidative carbonization. At the same time, low-cost manufacturing of new technologies, continuous reduction of costs, and introduction of new technologies emerging in China, the United States, Japan, Australia, Europe and other countries and regions. As well as the large-scale application of carbon fiber composite materials in China, the leading enterprises in the high-speed rail, automobile and construction market segments.

Liu Ruigang, a researcher at the Institute of Chemistry of the Chinese Academy of Sciences, gave a keynote speech entitled "Basic Research on High Performance PAN-Based Carbon Fibers". It is said that defects in carbon fiber preparation are inevitable, and defect structure control is essential for the preparation of high-performance carbon fibers. . Carbon fiber structure is closely related to performance, and the degree of graphitization is improved to improve the carbon fiber modulus. The joint structure between the carbon fiber graphite crystals determines its strength. PAN-based carbon fiber preparation should start from the source, and each step of polymerization, solidification, filament drawing, densification, pre-oxidation, carbonization and graphitization should be finely regulated.

Xu Zhiwei, a professor at Tianjin Polytechnic University, gave a keynote speech titled "Carbon Fiber Microstructure Control and Composite Interface Design". The synergistic effect of Y-ray irradiation on carbon fiber surface modification and mechanical properties, and low-dimensional carbon nanomaterials on carbon fiber composite interface The regulation has been deeply analyzed.

Lian Feng, a senior engineer of Zhongfu Shenying Carbon Fiber Co., Ltd., gave a keynote speech titled “Key Technology for Engineering of Dry-jet Wet Spinning Carbon Fiber Scale Production”, analyzing the engineering characteristics of carbon fiber production, the development of domestic carbon fiber, and the existence of The problems of low scale, low capacity release rate, and weak traction in high-end applications.

Ma Quansheng, senior engineer of Weihai Guangwei Composite Materials Co., Ltd., spoke at the speech entitled "Engineering Application and Enlightenment of Domestic Carbon Fiber in Aviation Field", the distribution of major carbon fiber manufacturers in the world, carbon fiber production capacity of China's carbon fiber production enterprises, and China's carbon fiber demand. Trends in change, the application of carbon fiber in the field of aviation to domestic carbon fiber.

Liu Naxin, a senior engineer of Shanxi Gangke Carbon Materials Co., Ltd., mentioned in his speech titled "Exploration of High-Performance Carbon Fiber Preparation Technology and Industrialization Exploration" that Taigang's high-performance carbon fiber development progress, TG800H carbon fiber industrialization preparation technology innovation, and prospects Development prospects of domestic high-performance carbon fiber industrialization preparation technology: low-cost high-performance carbon fiber preparation technology, structure and function integration high-performance carbon fiber preparation technology, high-strength high-modulus high-toughness carbon fiber preparation technology.

In the morning salon, Yu Jianyong, an academician of the Chinese Academy of Engineering, listened carefully to the experts' speeches and discussions and said that the participating experts had reached important common views on the status quo of China's carbon fiber development, the existing problems in development and the future development prospects. It has fully affirmed the achievements of China's carbon fiber from technology to industry in the past ten years, but we must also correctly understand China's carbon fiber materials in terms of product quality level, especially application level and high-end varieties, large-scale production cost control and other aspects. The level still has a gap, and it is necessary to raise the level of development with international high-level benchmarking.

The afternoon salon was hosted by Chen Li, a professor at Tianjin Polytechnic University.

Xiao Jun, a professor at Nanjing University of Aeronautics and Astronautics, emphasized in his speech entitled "Strong Tension Winding Technology and Its Application" that economics is fundamental and cannot be reduced in order to reduce costs. To be perfect, the application is the most Ok. At the same time, the research results of the team led by the fiber winding technology, automatic tape laying technology, automatic wire laying technology, three-dimensional local reinforcement technology (Z-Pin), pulse molding technology (ADP), and the future tension distribution will be introduced. Research and optimization, high-efficiency winding technology and other aspects to increase research efforts.

Chen Li, a professor at Tianjin Polytechnic University, made a speech entitled "Characteristics and Analysis of Deformation Characteristics of Three-Dimensional Textile Preforms" and proposed that the fiber structure of the preform has a decisive influence on the final mechanical properties of the composite. The textile preform has typical deformation characteristics, revealing the deformation mechanism of the preform. The virtual fiber model can realize the refined modeling of the preform structure at different scales, as well as the numerical analysis method of the preform forming process and the deformation process.

Li Diansen, a professor at Beijing University of Aeronautics and Astronautics, gave a keynote speech entitled "Textile Composites and Mechanics", from macro/mesoscale textile composites and mechanics, micro/nanoscale textile composites and mechanics, natural/bionic textile composites and The development and application of mechanical and textile composite structural parts are analyzed in detail. From the perspective of the application of braided parts, it is bold to envisage the possibility of the emergence of bionic ground-effect suspension super-high trains in the future, which has attracted the attention of experts present.

Ma Li, a professor at Harbin Institute of Technology, gave a keynote speech titled "Design and Preparation of Composite Material Array Structure and Its Mechanical Properties". The preparation process, deformation law and failure characteristics of composite lattice structure, vibration damping of sandwich structure Performance, connection of lattice sandwich structure, three-dimensional negative Poisson's ratio structure of composite material, engineering application of composite lattice structure.

Zhang Guoli, a professor at Tianjin Polytechnic University, introduced the limitations of RTM molding technology, new technical methods for RTM resin flow control, and RTM molding process for complex structural parts during the keynote speech entitled “Control Methods and Techniques for Composite RTM Injection Technology”. Results.

Finally, Sun Jinliang, an academician of the Chinese Academy of Engineering, said in his concluding remarks that China's carbon fiber should establish a national brand concept and build a domestically-owned model. We must pay attention to the designability of composite materials, and actively design materials instead of simple imitation. We should absorb more experts from outside the industry to participate in the development of carbon fiber and composite materials industry, solve the breakthrough of carbon fiber industrialization process and equipment core technology, limited talent team in carbon fiber and composite materials, and serious shortage of key technical talents.