Carbon fiber composite materials are increasingly favored in many fields such as aerospace and aviation 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 jointly developed a new composite of graphene nano-reinforced materials. Based on the traditional carbon fiber composites, the mechanical properties of the material have increased by more than 10%, opening a new revolution in carbon fiber composites.
According to Wu Di, the project leader, the graphene nano-reinforced new composite material is to add nano-scale graphene to the carbon fiber composite material to further improve the toughness, strength and rigidity of the carbon fiber material. Compared with traditional carbon fiber composite materials, in addition to the improvement of mechanical properties, it also has conductive, electromagnetic shielding and moisture-proof and waterproof functions.
The conductive property of the material is obviously superior to the conventional composite material, and can effectively avoid the situation that the conventional composite material and the metal material are easily accumulated to form electrochemical corrosion, which can greatly improve the structural durability of the product; the new composite material It has a good electromagnetic shielding function and can be used to prepare the instrument equipment housing. Compared with the traditional metal material housing, it can protect the internal electronic components from electromagnetic radiation and achieve the effect of weight reduction. It has strong hydrophobic properties and can be used to prepare moisture-proof structures, improve the environmental adaptability of products, and provide support for long-term storage and durability of products under humid conditions.
Nano-reinforced composite structure as an important way to subvert the performance of materials has been a research hotspot in the field of materials in recent years. The traditional practice is to use carbon nanotubes as a reinforcing 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, and material uniformity. Poor, it is difficult to make a large-sized material, and the material texture is relatively brittle and prone to breakage.
The graphene nano-reinforced novel composite material jointly developed by the R&D center and Harbin Institute of Technology is a graphene sponge prepared by using graphene oxide as a material. The graphene sponges have three-dimensional growth properties and are connected to each other to be very uniformly fused with the carbon fiber composite material. If the graphene sponge is likened to the "skeleton" of the human body, then the carbon fiber composite material is "muscle", and the two are completely fused together, so the uniformity and consistency of the material are very good.
