Method for preparing PVDF modified three-dimensional braided carbon fiber structural damping composite material

Abstract

The invention provides a method for preparing a PVDF modified three-dimensional braided carbon fiber structural damping composite material, wherein the method includes the steps: preparation of a PVDF solution; pre-treatment of a three-dimensional braided carbon fiber; preparation of a three-dimensional braided carbon fiber with a PVDF coating layer: immersing the pretreated three-dimensional braided carbon fiber into the PVDF homogeneous solution and then taking out the three-dimensional braided carbon fiber, extruding out excess mixed adhesive paste, putting into an 80 DEG C-140 DEG C drying oven, drying for at least 4 h, and making a DMF solvent fully volatilized, to obtain the three-dimensional braided carbon fiber with the PVDF coating layer; and preparation of the damping composite material. The method has the advantages that the film forming process is simple and easy to operate, and the PVDF composition is simple and has chemical properties. The method has the advantages of simple equipment, high production efficiency, less material loss, and easy realization of mechanized operation, and is suitable for preparing materials with complex shapes.

Description

technical field [0001] The invention belongs to the field of composite materials, and relates to a preparation method of a PVDF modified three-dimensional braided carbon fiber structure damping composite material. Background technique [0002] In the 1860s, in order to meet the technical needs of aerospace cutting-edge fields, advanced composite materials with carbon fiber as reinforcement came into being. Due to the outstanding characteristics of high-performance fiber-reinforced resin-based composite materials such as high strength, high stiffness, light weight, and good designability, they have a very wide range of applications as structural materials. During the use of structural materials, it is inevitable that they will bear large mechanical vibration loads, especially in high-speed and high-load situations. Fields such as trains are of great significance. [0003] For the research on improving the damping of composite materials, most of them modify the matrix, or co...

AI Technical Summary

Problems solved by technology

However, these methods have their own shortcomings: on the basis of improving the damping, the mechanical properties of the material will be sacrificed to varying degrees, which will affect the reliability of the composite material.

Or it is prone to delamination during the loading process, resulting in poor mechanical properties and affecting its use

Images