Gas phase growth carbon fiber applications are also called chemical vapor deposition carbon fibers. It refers to the pyrolysis deposition of a specific mixture at high temperature, and the growth of catalyst particles into carbon fibers. The diameter is several micrometers, and it has good oxidation resistance and corrosion resistance. The preparation method can contact the vapor of hydrocarbon with the source of iron, nickel, sulfur, its oxide, salt particles and other catalysts and hydrogen and oxygen, and then go through the graphitization treatment surface to make the shape of spring. Reinforcing agent, spring, etc. used in composite materials.
Gas phase growth carbon fiber is the carbon material on the fiber, and the chemical composition carbon element accounts for more than 90% of the total mass. Due to different raw materials and preparation methods, the performance of carbon fiber is also different. At present, most countries classify carbon fibers according to their habits, which are generally divided into the following three categories:
(1) classification by raw materials: cellulose (rayon) or adhesive polypropylene finishing; Asphalt (isotropic, isotropic intermediate phase) Foundation; Peihua.
(2) classification according to manufacturing conditions and methods: carbon fiber (800~1600); Graphite fiber (2000~3000); Activated carbon fiber, gas phase growth carbon fiber.
(3) classification according to mechanical characteristics: General level (GP); High performance (HP): Including medium strength (MT), high strength (HT), high strength (UHT), medium Model (1m), High model (HM) and high Model (UHM).
According to different raw materials, there are five kinds of carbon fibers: adhesive, vermicelli (polypropylene) base, asphalt base and gas phase growth fiber. The market of adhesive-based carbon fiber and phenolic carbon fiber is gradually decreasing. Meteorological growth fiber is in the development stage. Fan carbon fiber and asphalt carbon fiber have the same performance, complement each other and develop side by side.
First of all, we should have a full understanding of the development of the application of gas phase growth carbon fiber. With the development of world carbon fiber, polycarbon fiber is in a stable growth period. Crying energy asphalt-based carbon fiber is entering a stage of extensive development and application of various technologies. Viscose and hyperaldehyde carbon fiber in order to meet special needs, only a small amount of carbon fiber is retained, and meteorological growth carbon fiber is gradually breaking through the core technology of industrialization. Overseas polypropylene purchasing machine T-1000 polycarbon fiber developed by Tongli with high carbon fiber performance, the strength is 72kg/mm2, the extension is 2.4%, and the coefficient is 30t/mm2. Major enterprises in the world have developed new varieties of carbon fiber with production, coarse spinning, high strength and medium wool, and have developed strength.
Due to its excellent processing performance, it is gradually replacing the existing T-30/carbon fiber. Asphalt-based carbon fiber has developed into a high-performance carbon fiber with a strength of 0.74% of 690kg/mm2 and a coefficient of 93T/mm2, there are signs that the world's carbon fiber will become a new high-performance material.
