2results about How to "Simplify the modification process" patented technology

This invention discloses a method for preparing carbon fiber epoxy composite materials that combine high mechanical properties and a low coefficient of thermal expansion. Belonging to the field of composite materials, it addresses the technical challenge of simultaneously improving the mechanical properties and reducing the coefficient of thermal expansion of composite materials using existing carbon fiber processing methods. By non-covalently modifying carbon nanotubes with ionic liquids, unlike traditional covalent modification methods, the intrinsic strength of carbon nanotubes is preserved, constructing a multi-mechanism synergistic interface reinforcement system. This specifically addresses the key problems of traditional sizing agents having a single interfacial effect and hindered stress transmission. In this invention, flexible polyimide acts as a bridge at the interface, while rigid carbon nanotubes construct an effective armor on the fiber surface. The two form a rigid-flexible composite structure at the interface, which effectively alleviates interfacial stress concentration, significantly improves interfacial stress transmission efficiency, achieves uniform dispersion of external loads, and ultimately improves the mechanical properties of the carbon fiber epoxy composite material.

The application discloses a modification method for realizing the conductivity of basalt fiber. The method forms a conductive polymer on the surface of the basalt fiber through an in-situ polymerization method, so that the basalt fiber is endowed with conductivity. The method can control the particle size of the conductive polymer, the coating thickness and the conductivity of the basalt fiber by adjusting experimental parameters such as the types and concentrations of monomers, oxidants and dopants and the polymerization reaction time. The method is simple and efficient in manufacturing process, and is strong in controllability of structure and performance. The modified basalt fiber has good conductivity, and the resistivity of the basalt fiber is adjustable in the range of 1~10 ‑3 Ω·cm, which widens the application of the basalt fiber in the fields of electromagnetic shielding and electrostatic protection. Moreover, the method does not damage the structure of the fiber itself while realizing the conductivity of the basalt fiber, and improves the mechanical performance of the basalt fiber to a certain extent.