Preparation method of low-density composite material wave-absorbing plate

Abstract

The invention relates to the technical field of preparation of wave-absorbing composite materials, particularly to a preparation method of a low-density composite material wave-absorbing plate. According to the invention, the functional integrated low-density wave-absorbing plate is prepared from an aramid fiber reinforced composite material, carbon nano tubes, nickel-plated carbon nano tubes anda vinyl resin through a hot pressing tank; the contents of the carbon nano tubes and the nickel-plated carbon nano tubes are different in a laying stage, a resin is added into the prepared vinyl resin, and 1%, 1.2% and 1.5% of modified titanate are added into the resin, so that the wave-absorbing agent can be dispersed in the resin, the surfaces of the resin and the fibers can be improved, the resin can well permeate the reinforcing fibers, and the mechanical property of the composite material is improved; and according to the wave-absorbing principle and the low-density requirement of the composite material, the functional integrated composite material is prepared by adopting the hot pressing tank through the formula design of the wave-absorbing agent and the laying design of the reinforcing fibers, so that the composite resin prepared by the process is low in content and good in material compactness.

Description

technical field [0001] The invention relates to the technical field of preparing wave-absorbing composite materials, and more specifically, to a method for preparing low-density composite wave-absorbing boards. Background technique [0002] With the rapid development of electronic information technology, electronic products are developing in the direction of integration, miniaturization, and broadband, and the problems of electromagnetic compatibility and electromagnetic interference of electronic products are becoming more and more prominent. Therefore, higher requirements are put forward for absorbing materials. , light, wide and strong. The wave-absorbing composite material is a structural functional material that takes into account both wave-absorbing and load-bearing protection capabilities. The composite material made of this material process has better mechanical properties than traditional wave-absorbing materials, and the wave-absorbing frequency bandwidth is wide, ...

AI Technical Summary

Problems solved by technology

In addition, only the application of nickel-coated carbon nanotubes in composite materials is carried out, and the nickel-plating method of nickel-coated carbon nanotubes is not explained.

[0005] The mechanical properties of the composite molding material of pure wave absorbing agent are poor, and it is difficult to meet the performance requirements of new devices and electromagnetic protection environments

In order to improve the mechanical properties of microwave-absorbing composite materials, fiber materials can be used for reinforcement. In the past, glass fibers and modified glass fibers were used as reinforcing materials to prepare microwave-absorbing composite materials. Although the density has been reduced, it is difficult in special aviation fields To meet the needs of light weight, the present invention uses aramid fibers with low density and good electromagnetic wave penetration as reinforcement materials, and the density can be reduced by 20% compared with glass fibers; Large, so the content of nickel-plated carbon fiber directly affects the density of the composite material

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