Preparation method of composite material with negative dielectric constant and negative permeability metamaterial performance

Abstract

The invention relates to a preparation method of a composite material with negative dielectric constant and negative permeability metamaterial performance, the method comprises the following steps: uniformly mixing a polyolefin elastomer and an organic solvent, and standing to swell the polyolefin elastomer; mixing carbon nano tubes with the swollen polyolefin elastomer, and then drying to removethe solvent to obtain a carbon nano tube / polyolefin elastomer composite material; uniformly stirring a conductive silver adhesive and the carbon nanotube / polyolefin elastomer composite material, and then curing and molding to obtain the composite material with the negative dielectric constant and negative permeability metamaterial performance. Compared with the prior art, the metamaterial with thenegative dielectric constant and negative permeability performance is prepared for the first time by using an insulating polymer-the polyolefin elastomer as a matrix, the application range of the metamaterial is greatly expanded, and the metamaterial can be applied in the fields of stealth, miniature antennas, electronic components and the like.

Description

technical field [0001] The invention relates to the field of materials, in particular to a method for preparing a carbon nanotube / polyolefin elastomer composite material with double negative metamaterial properties. Background technique [0002] There are two ways to generate double-negative metamaterial properties with negative permittivity and negative permeability, respectively. First of all, there are two types of negative permittivity, the Drude model and the Lorentz model. There are also two completely different mechanisms for the generation of negative magnetic permeability. One case is the phenomenon that the composite material whose filler is magnetic particles will produce negative magnetic permeability. The frequency dependence of permeability can be represented by two types of magnetic resonance: domain wall motion and gyromagnetic spin motion. Another situation is that a large number of conductive loops are formed in the system, which will generate an induced...

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Problems solved by technology

Another situation is that a large number of conductive loops are formed in the system, which will generate an induced current under the applied electromagnetic field, which in turn leads to the generation of negative magnetic permeability

At present, most researches use magnetic particles or metal materials to prepare double-negative metamaterials. The negative value of the dielectric constant of the prepared material cannot match the magnetic permeability, which greatly limits its application.

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