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The development of nano carbon fiber

2020-09-01 11:39:42
Times

In recent years, research on carbon nanotechnology has been quite active, with a variety of nano-carbon crystals, needles, rods, and barrels emerging in endlessly. In 2000, German and American scientists also prepared a hollow cage-shaped molecule composed of 20 carbon atoms. According to theoretical calculations, containing 20 carbon atoms is only composed of regular pentagons, and C60 molecules are the smaller one of the fullerene structure molecules. Considering the original intermolecular bonding angle and strength, people have always thought this Class molecules are very unstable and difficult to exist. German and American scientists have produced C60 cage molecules to solve an important research topic in the field of materials science. Among the carbon nanomaterials, new carbon materials such as carbon nanofibers and carbon nanotubes have many excellent physical and chemical properties and are widely used in many fields.

is divided into acrylonitrile carbon fiber and pitch carbon fiber. Carbon fiber is lighter than aluminum but stronger than steel. Its specific gravity is 1/4 of iron, and its strength is 10 times that of iron. In addition to its superb strength, its chemical properties are very stable, high corrosion resistance, and high temperature and Low temperature, radiation resistance, deodorizing. Carbon fiber can be used in a variety of different fields. Due to the high manufacturing cost, it is widely used as a structural material for aviation equipment, sports equipment, and construction engineering. The University of Illinois in the United States invented a cheap carbon fiber that has high strength and toughness, and at the same time has a strong adsorption capacity, can filter toxic gases and harmful organisms, and can be used to make gas protective clothing, masks, gloves and protective clothing.

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Nano-carbon materials refer to carbon materials with at least one dimension smaller than 100 nm in the dispersed phase. The dispersed phase can be composed of carbon atoms, heterogeneous atoms (non-carbon atoms), or even nanopores. Nano-carbon materials mainly include three types: carbon nanotubes, nano-carbon fibers, and nano-carbon balls.

Nano-carbon fiber: refers to a linear material with a nanometer-scale diameter and a large length with a certain aspect ratio. In addition, fibers modified by filling ordinary fibers with nanoparticles are also called nanofibers. In a narrow sense, the diameter of nanofibers is between 1nm and 100nm, but broadly speaking, fibers with a fiber diameter of less than 1000nm are called nanofibers.

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