The hottest two institutions in China jointly deve

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In recent years, carbon fiber composites have attracted more and more attention in aerospace and other fields due to their light weight and high temperature resistance. Recently, the R & D center of China Academy of launch vehicle technology and Harbin Institute of Technology (hereinafter referred to as "Harbin Institute of technology") jointly developed "graphene nano reinforced new composites" On the basis of traditional carbon fiber composites, the mechanical properties of this material have been improved by more than 10%, opening a new revolution in carbon fiber composites

graphene nano reinforced new composite material

according to Wu Di, the project leader, the greater the resolution of graphite, the greater the graphene nano reinforced new composite material, that is, in the carbon fiber composite material, the nano graphene is added, which further improves the toughness, strength, stiffness and other properties of the carbon fiber material

compared with traditional carbon fiber composites, in addition to the improvement of mechanical properties, it also has the following advantages:

good conductivity. The conductivity of this material is significantly better than that of traditional composite materials, which can effectively avoid the accumulation of charges on the contact surface between traditional composite materials and metal materials, resulting in electrochemical corrosion, and greatly improve the structural durability of products

electromagnetic shielding function. The new composite material has good electromagnetic shielding function and can be used to prepare the shell of instruments and equipment. Compared with the traditional metal shell, it can not only protect the internal electronic components from electromagnetic radiation interference, but also achieve the effect of weight reduction

moisture proof and waterproof function. The material has strong hydrophobic properties, which can be used to prepare moisture-proof structures, improve the environmental adaptability of products, and provide support for long-term storage and durability improvement of products in a humid environment

microstructure of graphene nano reinforced new composites

nano reinforced composite structure, as an important way to subversively improve material properties, has been a research hotspot in the field of materials in recent years. Generally, the traditional practice is to use carbon nanotubes as reinforcement structure, but this method has many technical bottlenecks and limitations. The most significant problem is that carbon nanotubes have strong fluidity, easy to produce "agglomeration" phenomenon, poor material uniformity, difficult to make large-size materials, and the material texture is relatively brittle, prone to fracture

the graphene nano reinforced new composite jointly developed by the R & D center and Harbin Institute of technology uses graphene oxide as the material to prepare graphene sponge, which has three-dimensional growth, is connected with each other, and can be very evenly fused with carbon fiber composites. If graphene sponge is compared to the "skeleton" of human body, carbon fiber composite is "muscle", and the two are completely integrated together, so the uniformity and consistency of the material are very good

Wu Di introduced that in the development process of this material, the R & D center is mainly responsible for the early simulation design, and Harbin Institute of technology is mainly responsible for the preparation of materials. The successful development of this material has subversively improved the performance level of existing composites, opened up a new way for the research of nano reinforced composite technology, and laid a material foundation for the lightweight design of aerospace vehicles in the future

the quotation is finished

it can be seen that this is a typical ternary composite, in which graphene sponge is equivalent to bone and carbon fiber is equivalent to? Muscle fiber, while resin is equivalent to connective tissue. From the micrograph, it can be seen that the structure of this material is crisscross on the three-dimensional scale, and it is highly integrated with high material temperature and high mold temperature. Therefore, it is necessary that it has better mechanical and physical and chemical properties than carbon fiber composites. The current problem of this material is industrialization, because how to realize the high experimental cycle, long-quality three-dimensional growth of graphene sponge and its high integration with carbon fiber resin composites with mass production scale and efficiency is a great challenge for any country. Therefore, the small batch application of this material may begin soon, but there is still a long way to go to realize industrialization. In addition, the production process of this material is special, and the cost is high except for the specific requirements for the control mode. Therefore, there is no possibility of commercialization in the foreseeable future. And to tell the truth, it is not needed or affordable for civilian occasions

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