Preparation of graphene/superpolymer multilayer material with high electromagnetic shielding performance

Abstract

The invention provides a preparation method of a graphene/superpolymer multilayer material with high electromagnetic shielding performance, and belongs to the field of electromagnetic shielding material preparation. The method comprises the following steps: firstly preparing an oxidized graphene solution by adopting a liquid-phase stripping method; then carrying out freeze drying on a graphene thin film reduced by metallic foil under a vacuum condition so as to obtain a graphene aerogel thin film; and finally infiltrating a thin superpolymer layer on the surface of the thin film, laminating thin film layers together to prepare the graphene/superpolymer multilayer material. The method is simple in technological conditions, the flow is easy to control, the source of the raw materials is wide, the cost is low, and the method is convenient for industrial production. Due to the fact that graphene sheets are assembled to form a certain structure before the graphene is mixed with the superpolymer, and agglomeration in the mixing process of the graphene sheets and the superpolymer is avoided, the composite material has the characteristics of high strength, high conductivity, corrosion resistance, high electromagnetic shielding performance and the like, and can be widely applied to civil and military fields such as consumer electronics, communication equipment, information transfer and security.

Description

technical field [0001] The invention belongs to the field of preparation of electromagnetic shielding materials, in particular to a preparation method of a graphene / high polymer composite multilayer structure material. Background technique [0002] With the advent of the digital industrial age, the continuous development of electronic communication equipment and intelligent terminals has brought great convenience to people's lives and accelerated people's life rhythm and work efficiency. However, during the working process of electronic equipment, a certain amount of electromagnetic waves will be generated. The radiation brought by these electromagnetic waves will not only threaten human health, but also interfere with the normal operation of electronic components with high sensitivity. In order to prevent the increasing electromagnetic pollution, more and more attention has been paid to the research on the preparation and performance of electromagnetic shielding materials. ...

AI Technical Summary

Problems solved by technology

However, in the composite materials obtained by this method, the dispersion of graphene is usually relatively poor, and it is prone to agglomeration, which greatly reduces the strength, conductivity and electromagnetic shielding properties of the composite material.

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