Yangguang Online Hai July 24th news (Reporter Wu Shanyang correspondent Yu Guangxian) After polymerization, spinning, drawing "warm-up", and then into the oxidized carbonization "furnace roasting", 48K large tow carbon fiber is black and bright, "breaking out ” Sinopec Shanghai Petrochemical Co., Ltd.’s “PAN (Polyacrylonitrile) Based Large Silk Bunch Raw Silk and Carbon Fiber Technology and Process Package Development Project” was recently identified by the domestic authoritative expert group of Sinopec Corp. The technology has reached the international advanced level.
Carbon fiber is a high-strength, high-modulus new fiber material with a carbon content of more than 95%. It has excellent mechanical properties, its specific gravity is less than 1/4 of steel, its strength is 7-9 times that of steel, and it also has corrosion resistance and high modulus. It is called "the king of new materials" and is also called As "black gold", it has broad application prospects in all walks of life.
In the carbon fiber industry, it is generally referred to as a large tow carbon fiber in which the number of carbon fibers per bundle is more than 48,000 (abbreviated as 48K). At present, each bundle of carbon fiber in China is basically between 1000 (1K) and 12,000 (12K), which is called a small tow. The biggest advantage of the 48K large tow is that under the same production conditions, the single-line capacity and quality performance of carbon fiber can be greatly improved, and the production cost can be reduced, thereby breaking the application limitation brought by the high price of carbon fiber.
According to Huang Xiangyu, chief engineer of Shanghai Petrochemical Acrylics Department, from 12K small tow to 48K large tow, it is not so simple to enlarge the number of spinning ports from 12,000 to 48,000. The middle has to go through a very difficult problem. Road, which requires deep scientific research guidance and rich practical experience to support, can solve many key technical difficulties, and Shanghai Petrochemical has created this condition after 10 years of grinding a sword. It can be said that the successful breakthrough from 12K to 48K marks the leap from the quantitative change to the qualitative change of Shanghai Petrochemical carbon fiber technology, which not only fills the domestic gap, but also reaches the international advanced level, which will greatly promote the “Shanghai Zhizao” industry. effect.
Shanghai Petrochemical is one of the largest large-scale refining and chemical integration enterprises in China, and it was once the largest acrylic fiber production enterprise in China. Relying on the advantages of the acrylic fiber industry, the company took the lead in conducting research and technical research on carbon fiber as early as the 1980s. In 2007, Sinopec decided to deploy PAN-based carbon fiber research and development and industrialization, and implemented the construction project in Shanghai Petrochemical.
Carbon fiber has strong technical barriers. So far, the core technology has been owned and mastered by only a few developed countries such as Japan and the United States. In this regard, with the strong support of Sinopec and Shanghai, Shanghai Petrochemical, together with dozens of research institutes, universities and enterprises such as Shanghai Petrochemical Research Institute, Shanghai Engineering Company and Fudan University, has embarked on a business-oriented The road of collaborative innovation based on "production, learning, research, and use", and the seamless connection between the university's powerful basic theory research and the development of engineering technology of the enterprise, not "walking black", not "nothing to imitate", no "Blind trial and error", under the guidance of clear goals, less detours, cross the gap, and achieved technological accumulation.
Under the concerted efforts of all parties, the carbon fiber research and rapid development: in November 2008, the pilot plant was built; in March 2009, the 12K original wire was successfully developed.
In September 2012, Shanghai Petrochemical's annual production of 3,000 tons of raw silk and 1,500 tons of carbon fiber project was completed and put into operation using the self-developed domestic NaSCN (sodium thiocyanate) wet process and complete intellectual property rights. The industrial production capacity of 3,000 tons of polymer, 1,500 tons of raw silk and 500 tons of carbon fiber per year has been formed.
The Shanghai Petrochemical Carbon Fiber Project has received great attention and strong support from the State, Sinopec and Shanghai Municipal Government. The “3000 tons of PAN raw silk industrialization demonstration project” has been listed as a national high-tech project, and “PAN-based carbon fiber complete technology research” It is listed as Sinopec's 2010-2017 Shilong Project, and the “1500-ton PAN-based carbon fiber project” is listed as a major project for Shanghai's innovation and high-tech industry development. During this period, the project has undertaken one national 863 project, one 973 project, two projects of the National Development and Reform Commission, five projects of the Shanghai Municipal Government, and 26.38 million yuan of government funding. During the period, Sinopec Corp. has applied for 179 patents and 62 authorizations for carbon fiber. According to statistics in 2016, the number of patent applications related to carbon fiber in Sinopec ranks first in the country and fourth in the world.
Huang Xiangyu said that especially in participating in the national 863 project and the 973 project, the deep integration with the research institutes has enabled the basic research theory to be better applied to technology research and development, and has played a positive role in promoting the overall technology development of the large tow. .
In May 2016, Shanghai Petrochemical carried out research and research on the industrialization of carbon fiber 48K large tow. In January 2018, the technology of polymerization, spinning and oxidation carbonization of large tow carbon fiber was successfully developed, and the technical basis of the complete technology package of PAN-based 48K large tow carbon fiber was formed. In March, we successfully produced a 48K large tow carbon fiber in the true sense of China, and passed through the entire process. According to tests, the 48K large tow strands have been oxidized and carbonized into 48K carbon fiber tows, and the strength of the monofilaments has reached high performance. This lays a solid foundation for the technical upgrade of the general-purpose carbon fiber (small tow + large tow) and the production of high-performance carbon fiber.
It is understood that since the first-stage 1,000-ton carbon fiber device was started, as of May 2018, the plant has produced 4,286 tons of raw silk and produced 709 tons of carbon fiber. The unique NaSCN wet raw silk process enables the carbon fiber produced to have excellent surface structure and interfacial properties, which can greatly enhance the performance of carbon fiber composites.
With the first batch of “National Fiber Engineering Research Center” named by Shanghai Petrochemical, the “Sinopec Carbon Fiber and Composite Materials Key Laboratory” jointly developed by Shanghai Petrochemical and Shanghai Petrochemical Institute, Shanghai Petrochemical Institute and Seven Enterprise Research Institutes The innovative platform of Sinopec's high-performance fiber and its composite materials, which is composed of the three systems of the “Fiber Processing Application Center (FTC)”, has been used in the traditional energy field. In the maintenance of 9 medical insurance infrastructures such as Mozambique N6 Highway, Tianjin Jinbin Expressway, Shenyang-Dandong Railway Line and Liaoning Shenwo Reservoir, carbon fiber pultruded sheet reinforcement is used, which not only makes construction efficient and convenient, but also significantly improves structural bearing capacity. Demonstration and application in the replacement of imported plastic gears with carbon fiber gears, as well as reinforcement and repair of liquid phase propylene, residual carbon four, flare gas, methane hydrogen, nitrogen, sewage and other petrochemical pipelines, high corrosion equipment, chemical workshop corrosion-resistant buildings, etc. good.
Shanghai Petrochemical also cooperated with Shengli Oilfield Company and its restructuring enterprise Xinda Pipe Industry Technology Co., Ltd. to develop carbon fiber sucker rods. After 5 batches of tests, the sucker rods have excellent performance and are equivalent to foreign carbon fiber levels. Replace imports. As of the end of 2017, Shengli Oilfield has used a total of 93 wells in the Shanghai Petrochemical carbon fiber continuous sucker rod test, with a total of 209,000 meters. It is currently being further promoted and applied, especially in the northwest.
With the advent of 48K large tow carbon fiber, Shanghai Petrochemical carbon fiber technology has a strong driving force to support the development of the industry, ushering in a broader application prospect. In the field of traditional energy and new energy, the company will develop and produce general-purpose, low-cost large tow, high-strength and high-modulus carbon fiber raw materials, which are mainly applied to oil fields (sucker rods, pumping casings, components, etc.), atmospheric pressure. And high-pressure vessels (high-pressure CNG bottles, vehicle CNG tanks, hydrogen storage bottles, compressed air bottles, etc.), gas tank double-layer tanks, vehicle tanks, petrochemical pipeline repair and reinforcement (factory pipelines of various materials and working conditions, long-distance crude oil pipelines) Etc.), large-capacity wind power blades, etc.; in the high-end fields such as rail transit, new energy vehicles, civil aviation, wind power, etc., to achieve commercial applications or industrial demonstration applications. At present, the company has cooperated with related projects such as offshore wind power, large wind power and automobile industry.
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