Each provision of paths to break the bottleneck of technology in Japan

2016/7/5 16:34:25

Dongli, Japan through the carbonization process to make carbon fiber strength and modulus at the same time to enhance more than 10%, the first to reach the third generation of carbon fiber technology requirements. Dongli company believes that the carbon fiber at the same time to obtain high tensile strength and high elastic modulus of the key lies in the carbonization process of heat treatment technology and high temperature equipment. In heat treatment technology, temperature, drafting, catalysis, magnetic field and many other factors will affect the performance of carbonized fiber. In March 2014, Dongli announced the successful development of T1100G carbon fiber. Toray using traditional pan spinning solution technology, fine control of carbonizing process, in nano scale improve the micro structure of carbon fiber, the control of carbon fiber graphite crystallite orientation, crystallite size and defects, so that the strength and elastic modulus have been increased dramatically. T1100G tensile strength of 6.6GPa, than T800 to improve 12%; modulus of elasticity 324GPa, 10%, is entering the stage of industrialization.

Georgia Science Institute research team break through raw silk production process. In maintaining carbon fiber high strength at the same time, the elastic modulus improve 28%. Carbon fiber products was still 30 years in the middle level of the elastic modulus, the performance is difficult to break. The United States National Defense pre research agency (DARPA) in 2006 to start advanced fiber structure project, the purpose is called the national advantage and scientific research strength, carbon fiber based next generation fiber structure development. As one of the participating research institutions of Georgia Institute of Technology, starting from the raw silk production technology, improve the elastic modulus of carbon fiber. In July 2015, the research team used innovative PAN based carbon fiber gel spinning technology, to enhance the tensile strength of carbon fiber to 5.5 ~ 5.8GPa, tensile modulus of 354 ~ 375GPa. Although the tensile strength and IM7 are equivalent, but the elastic modulus achieved a substantial increase of 36% ~ 28%. This is a combination of high strength and high modulus of carbon fiber. The mechanism is that the polymer chains are linked together to produce strong chain forces and the orientation of the crystallite orientation, which ensures the high strength of the larger crystallite size required for the high elastic modulus. This shows that the United States has a third generation of carbon fiber products, independent research and development strength.