Application of modified epoxy resin in carbon fiber products

1. Overview of modified epoxy resin

Modified epoxy resin is a composite material that improves the properties of the base epoxy resin by chemical or physical methods. It not only retains the original good adhesion, chemical resistance and electrical insulation of epoxy resin, but also significantly enhances its toughness, heat resistance and corrosion resistance by adding toughening agents, heat resistant agents and fillers. There are many kinds of modified epoxy resins, which can be divided into glycidyl ethers, glycidyl esters, glycidyl amines and fat groups according to their chemical structure, each of which has its unique application scenarios and performance advantages.

2. Introduction of carbon fiber products

Carbon fiber products are carbon fiber prepreg cloth as raw materials, through different processing methods (such as winding, rolling, molding, vacuum molding, etc.) processed material products. Because of its high strength, high modulus, low density and excellent corrosion resistance, carbon fiber has become an ideal material for aerospace, automotive, sports equipment and other fields. Carbon fiber products not only have the characteristics of light weight and high strength, but also significantly improve the durability and reliability of the product.

3. Modified and enhanced mechanical properties

The application of modified epoxy resin in carbon fiber products significantly improves the mechanical properties of the products. For example, by adding a toughening agent such as carboxy-terminated liquid nitrile butadiene rubber (CTBN), the toughness of the epoxy resin can be effectively improved, and the crack growth of the product during the stress process can be reduced, thus enhancing the impact strength and tensile shear strength of the carbon fiber product. In addition, the use of difunctional toughening agents such as polypropylene glycol diglycidyl ether (PPG) can also improve the fatigue resistance of the product while maintaining high strength.

4. Improved temperature and corrosion resistance

The modified epoxy resin also significantly improves the temperature and corrosion resistance of carbon fiber products. By adding heat resistant agents, such as ketone anhydride resin (TOA), the thermal deformation temperature and thermal stability of epoxy resin can be improved, so that carbon fiber products can still maintain good performance in high temperature environment. At the same time, the antioxidants and preservatives added to the modified epoxy resin can effectively resist the erosion of chemical media such as acid, alkali and salt, and extend the service life of the product.

5. Lightweight application advantages

The combination of modified epoxy resin and carbon fiber makes carbon fiber products have significant advantages in lightweight. Carbon fiber is only about a quarter of the density of steel, but it is much stronger than steel. Therefore, the use of carbon fiber products can significantly reduce the weight of the product, improve energy efficiency and operational efficiency. In aerospace, automotive and other fields, lightweight is of great significance for improving fuel efficiency and reducing emissions.

6. Research on interface modification technology

The interfacial modification technology is the key to improve the binding force between carbon fiber and modified epoxy resin. The bonding strength between carbon fiber and resin matrix can be significantly improved by changing the morphology and chemical properties of carbon fiber surface by physical or chemical methods. For example, the use of coupling agents to treat the surface of carbon fibers can increase the interaction force with the resin matrix, thereby improving the overall performance of the composite. In addition, by optimizing the formulation and molding process of the resin matrix, the binding force of carbon fiber and the resin matrix can be further improved.

7. Application in transportation

Modified epoxy resin carbon fiber products have been widely used in the field of transportation. In the aerospace field, carbon fiber products are widely used in the structural parts and shells of aircraft, rockets and other aircraft because of their lightweight and high-strength characteristics. In the automotive sector, carbon fiber products are used to manufacture key components such as body and chassis to reduce vehicle weight and improve fuel efficiency. In addition, in the field of rail transit, carbon fiber products are also used to manufacture the shell and internal structural parts of the vehicle.

8. Construction and other applications

In addition to the field of transportation, modified epoxy resin carbon fiber products are also widely used in construction and other fields. In the field of construction, carbon fiber products are used to strengthen and repair concrete structures, such as Bridges, tunnels, building facades, etc. By pasting carbon fiber cloth or carbon fiber plate, the bearing capacity and durability of the structure can be significantly improved. In addition, in the fields of sporting goods, medical equipment, leisure products, carbon fiber products are also favored for their lightweight and high-strength characteristics.

In summary, the application of modified epoxy resin in carbon fiber products not only significantly improves the mechanical properties and temperature and corrosion resistance of products, but also makes carbon fiber products have significant advantages in lightweight. With the progress of science and technology and the growth of demand, modified epoxy resin carbon fiber products will play an important role in more fields.