Carbon fiber composite is a new generation of structural materials with the characteristics of light weight and high strength, which has a good application in the fields of automobile, aerospace, industrial rail transit, etc. However, the most common epoxy resin in carbon fiber composite has the biggest disadvantages of poor high temperature resistance, low ignition point, etc., so the application of carbon fiber composite is limited, which makes carbon fiber composite materials The flame-retardant material can not only improve the safety of the product, but also broaden the application limitations of carbon fiber in the future.
As a new light material instead of traditional metal, carbon fiber composite is usually used in the situation of high working strength or poor natural environment.
The properties of carbon fiber composites, such as nearly zero linear expansion coefficient and good corrosion resistance, have obvious application advantages.
However, the practical application of carbon fiber composite is not smooth. Similarly, in automobile, high-speed rail and other manufacturing fields, there is a great demand for carbon fiber composite materials. One of the important requirements of the structural products of carbon fiber composite materials is the various accidents that may be encountered in the process of high-speed driving, including collision, friction and fire. The product must be able to maintain a high ignition point, and will not release the harmful threat to passengers Gas and smoke.
Therefore, it is necessary for carbon fiber composites to withstand higher temperature and higher safety. The main factor limiting the high temperature properties of composite is matrix resin. In order to make the composite have certain flame retardancy, there are two common methods, one is to use the bismaleamide resin as the matrix material, but the toughness and impact resistance of the resin are poor, the other is to add the corresponding flame retardant in the original composite. Although there are many kinds of flame retardants on the market at present, the specific application effect and use conditions of each flame retardant are different, and the factors considered are relatively complex. The research on carbon fiber composite in Suzhou has a long history, and many achievements have been made in modifying carbon fiber composite and thermoplastic carbon fiber.
It is said that the so-called flame retardant does not mean that the material is nonflammable, but under the open fire at the specified temperature, it needs to maintain the corresponding strength for a certain time, its combustion speed is lower than the formula speed, and the combustion product is non-toxic. The latest "Renaissance" in the body structure. The high-speed railway EMU adopts the carbon fiber composite material with fire resistance performance, which ensures the lightweight requirements of the carbon fiber composite body, the fire-retardant performance also guarantees the safety of passengers in the body, increases the occurrence and harm of fire to the maximum extent, and improves the overall safety of the body. When the safety of carbon fiber composite materials in open fire and high temperature reaches or approaches the level of metal materials, the application field of carbon fiber composite materials will be further expanded. In some areas where light weight is required, carbon fiber composites cannot be used due to temperature limitations. This concern will also be addressed, which is conducive to the application and promotion of carbon fiber composites in the market.