China’s carbon fiber industrialization has entered a new stage of development. After breaking through the T1100 carbon fiber production technology bottleneck in industrial production, China’s thinking in the field of carbon fiber research has undergone a fundamental change. China will no longer continue to catch up with international standards. Is to lead international standards…
As the director of China National Carbon Fiber Engineering Technology Research Center, deputy director of the Key Laboratory of Carbon Fiber and Functional Polymer of the Ministry of Education of Beijing University of Chemical Technology, and director of the Institute of Carbon Fiber and Composite Materials, Xu Lianghua has rooted in the field of carbon fiber research for more than 30 years and has experienced domestic production. Half the history of carbon fiber development.
In his opinion, China's carbon fiber research institutions should stick to the basic research, application foundation and forward-looking work of carbon fiber materials. "A person's energy is limited. We should stick to our duty and build the foundation of the carbon fiber industry."
Break the inherent thinking and rebuild the mainstream process of carbon fiber localization
From the late 1960s to the 1980s, domestic carbon fiber went through a difficult stage, and the material industry lacked its knowledge and scientific research capabilities.
At that time, the research and development of carbon fiber was not carried out as a large-scale collaborative technology system. From polymerization, spinning, oxidation, carbonization, and application to the framework of segmentation at that time, coordination could not be formed.
The level of the national economy is also relatively low, which does not match the demand for carbon fiber R&D investment. The strength of scientific research is weak, and the reference and reference of advanced technology are lacking. The domestic awareness of carbon fiber is not high.
The most critical reason is that the mainstream technology of localization has not been found.
Therefore, before 2000, China's carbon fiber exploration has been in a lingering stage.
With the promotion of the market's demand for carbon fiber, the country and the government have increased their support for carbon fiber research and development. During the "Tenth Five-Year Plan" period, under the promotion of the national "863" project, three relatively concentrated R&D bases were formed with Beijing University of Chemical Technology, Shanxi Institute of Coal Chemistry of the Chinese Academy of Sciences, and Shandong University as the main forces.
Engaged in high-performance polyacrylonitrile (PAN) carbon fiber science and technology research, Xu Lianghua deeply feels the mission is very important, and lamented that it is not easy, "It requires a calm mind to do it."
In the last century, the nitric acid method represented the level of China's carbon fiber. However, the nitric acid method has been eliminated internationally. Now the dimethyl sulfoxide method represents the level of China's carbon fiber. At that time, China already had dimethyl sulfoxide technology, but it was shelved because of its inherent thinking.
The team led by Xu Lianghua, based on the PAN/DMSO batch solution polymerization and one-step wet spinning process, was the first in China to develop a dimethyl sulfoxide solution system to prepare a domestically produced carbon fiber precursor with a regular cross-sectional structure. The dimethyl sulfoxide precursor process route plays a major role in the development of carbon fiber localization.
The quality of the polyacrylonitrile precursor produced by this process fully meets the needs of high-strength carbon fiber production. From then on, domestic carbon fiber has embarked on a fast track of orderly development from high-strength, high-strength medium-mode, high-mode, high-mode and high-strength.
Xu Lianghua believes that reusing the dimethyl sulfoxide method is not only a technological transformation, but also a conceptual transformation.
Breaking out of the benchmarking dilemma and realizing independent innovation of domestic technology
If the carbon fiber technology at the beginning of this century is in the transition stage, then the current carbon fiber industry can be said to be in the upgrading stage. "Next enter the industrialization of carbon fiber." Xu Lianghua said.
The development speed of domestic carbon fiber in the past 20 years far exceeds the development speed of the previous 30 years, and the industrialization has achieved numerous results. Technically, from the T300 at that time to the current high-strength and high-mode full coverage.
Although sticking to the basic research duties of the carbon fiber industry, the Xu Lianghua team does not forget to innovate. Xu Lianghua believes that domestic carbon fiber materials should realize independent innovation, and avoid following the pace of foreign development in a benchmark-style road.
During the "Tenth Five-Year Plan" period, Beijing University of Chemical Technology and Shanxi Coal Chemical Research Institute respectively launched the research and development of T700 carbon fiber. The two research routes are different. Shanxi Coal Chemical takes the dry-jet wet spinning route. Xu Lianghua's team proposed the technical direction of wet spinning process to prepare domestic T700 high-strength carbon fiber and received the support of the Ministry of Science and Technology.
After 4 years of hard work, wet spinning T700 grade carbon fiber has achieved a key technological breakthrough and applied it to carbon fiber companies represented by WHGW Carbon Fiber Technology Group, which means that the domestic high-strength carbon fiber industrialization technology gap has been filled. "This original innovation is unique to us, not even in Japan."
The realization of independent innovation of domestic carbon fiber technology undoubtedly strengthens Xu Lianghua's team's belief in promoting the localization of carbon fiber. "With the development of domestic carbon fiber up to now, we can do our own technology without benchmarking against foreign countries."
Take advantage of carbon fiber to maximize value
China's carbon fiber industry has entered the second stage of rapid development. With the development of new energy vehicles and other modern industries, "black gold" ushered in the development trend.