Novel electromagnetic shielding composite material and preparation method thereof

Abstract

The invention provides a novel electromagnetic shielding composite material. The composite material comprises a metal layer, thermosetting resin and a carbon fiber woven fabric, wherein the metal layer is one or composite structure of two selected from a metal foam layer and a metal mesh layer; a viscosity range of the thermosetting resin is 0.1-0.5 Pa.s, the thermosetting resin is uniformly mixedwith a nano conductive filler to form a resin mixed solution, and the nano conductive filler accounts for 1-10% by weight of the resin mixed solution; and the outer surface of the metal layer is provided with the carbon fiber woven fabric through the resin mixed solution, and the metal layer and the carbon fiber woven fabric are fully wetted and infiltrated in the resin mixed solution. The novelelectromagnetic shielding composite material provided by the invention has the advantages of a light weight, high bonding strength, stronger corrosion resistance, a wide application range, good shielding stability and a wide shielding wave band range.

Description

technical field [0001] The invention relates to the technical field of polymer composite materials, in particular to a novel electromagnetic shielding composite material and a preparation method thereof. Background technique [0002] With the rapid development of science and technology, the number of various wireless communication systems and electronic devices has increased sharply. While they bring convenience to us, they also bring problems such as electromagnetic interference and electromagnetic pollution. On the one hand, these electromagnetic waves will affect human physical and mental health. On the other hand, it also affects the normal work of other precision instruments. In addition, these electromagnetic leaks will cause technical information leaks. Electromagnetic radiation leaks are becoming more and more popular as a way of military and commercial leaks. attention. Therefore, electromagnetic shielding materials have received more and more attention as an impor...

AI Technical Summary

Problems solved by technology

The traditional method is to use metal materials with high shielding performance as the shielding material, such as nickel, copper, aluminum, etc. In order to reduce the density, foam metal or metal mesh can be used. The smaller and denser the mesh size, the better the shielding effect. However, Due to the poor corrosion resistance of metals, its use is limited in some acid-base environments

Filled conductive composite materials and intrinsic state conductive polymer materials overcome the shortcomings of difficult processing of metal materials and are not resistant to acid and alkali, and have good comprehensive performance, but the shielding stability of these materials is poor, and the shielding band range is narrow