Development of the hottest pitch based carbon fibe

2022-08-05
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The development of pitch based carbon fiber should be cautious.

pitch based carbon fiber, which is lighter than aluminum, stronger than steel, and thinner than human hair, has attracted the attention of coal chemical enterprises in Henan, Shanxi, Shandong and other places in recent years. Some places have even developed pitch based carbon fiber as a potential product in the "12th Five Year Plan". However, it is learned from the interview and research that the market demand for asphalt based carbon fiber with market potential is difficult to expand in the short term, while China's high-performance asphalt based carbon fiber is facing difficulties in technology, and the development of asphalt based carbon fiber is entangled

according to the raw materials, the industrialized carbon fibers in the world mainly have two series: one is polyacrylonitrile as the raw material, and the other is petroleum asphalt or coal asphalt as the raw material. The former accounts for about 70% of the total output of carbon fibers, and the latter accounts for about 30%. Asphalt based carbon fiber is divided into two categories, one is general-purpose asphalt carbon fiber, and the other is high-performance carbon fiber. The special fiber with carbon content greater than 92% prepared by refining, spinning, pre oxidation, carbonization or graphitization of asphalt is an indispensable engineering material in the aerospace industry and is widely used because of its excellent properties such as high strength, high modulus, high temperature resistance, corrosion resistance, fatigue resistance, creep resistance, conductivity and heat conduction. At the end of 1960s, Wuyu chemical company of Japan took the lead in realizing the industrialized production of petroleum asphalt carbon fiber in the world, while Osaka gas company of Japan was the first to realize the production of coal asphalt carbon fiber

luoyifeng, director of the national special fiber information center, introduced that at present, the world's annual demand for general-purpose asphalt carbon fiber is about 2000 tons, and the output is about 2000 tons. There is basically no demand gap in the international market. The annual output of general-purpose pitch carbon fiber in China is less than 100 tons, and the production and demand are basically balanced. However, there is no mature technology for high-performance carbon fiber in China, which is still a blank

coal tar pitch is the residue of coal tar distillation. The production of pitch based carbon fiber is one of the ways to improve the added value of products that need long-distance transportation or long storage cycle. In the early 1970s, China successfully developed pitch based carbon fiber with coal tar as raw material. However, due to the unstable product quality and test, it failed to realize industrial production. Since then, Shandong Yankuang Group and Shandong Zibo Mining Group have invested in a production line that directly uses coal pyrolysis to extract coal tar pitch, and finally ran aground due to immature technology

luoyifeng pointed out that there are still technical difficulties in developing high-performance carbon fibers in China. This difficulty is comprehensive, both in terms of equipment and technology. The composition of coal tar pitch is more complex than that of petroleum pitch, and it is more difficult to synthesize carbon fibers. In addition, as high-performance carbon fiber and its composites are high-tech products and indispensable new materials for the development of aerospace and cutting-edge technology, abrasion damage often occurs in foreign countries to restrict the export of related technologies, which also restricts the development and application of high-performance carbon fiber in China

in the market, pitch based carbon fiber can be widely used in the structural materials of aerospace, aviation, aircraft and spacecraft. The consumption of carbon fiber composites can account for 70% ~ 80% of small commercial aircraft and helicopters, 30% ~ 40% of military aircraft and 15% ~ 20% of large passenger aircraft. In addition, carbon fiber is also extremely suitable for sports goods, such as the long handle of a golf club, the head of a golf club, the head hitting plate, etc. its consumption has accounted for 50% of the consumption of carbon fiber sports goods. For example, the consumption of carbon fiber in a racket is about 500 tons, and the consumption of carbon fiber in a fishing rod is about 2000 tons. Luoyifeng said that at present, the market demand for these carbon fibers is mainly polyacrylonitrile carbon fibers. The market analysis of carbon fibers should distinguish polyacrylonitrile from asphalt based ones, which have their own performance indicators and application fields. At present, high-performance asphalt based carbon fiber has not been produced in China and cannot be bought in the market. In foreign countries, it is basically only used in very limited fields such as satellite antenna, and is basically limited to domestic use. Therefore, the market demand for high-performance asphalt based carbon fiber is still very small, and this situation will not change much in a short time

experts said that the development of asphalt based carbon fiber technology and market application restrict each other. At present, the development of asphalt based carbon fiber should be cautious after adding pads. Luoyifeng pointed out that China is rich in asphalt raw materials with low prices. Enterprises with certain financial strength can invest in technology development to overcome technical difficulties. The market promotion of high-performance carbon fiber depends on the cost and price. Only when the cost falls below 100 yuan/kg, there will be a large market space

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