Application of multilayer carbon nanotubes for creation of coatings absorbing electromagnetic radiation

A Shchegolkov,L Zavolokina,N Diesperova,I Parfimovich

doi:10.1088/1757-899x/696/1/012022

Abstract

The article presents the use of carbon nanotubes as modifiers-materials for protection against electromagnetic radiation. The technique of obtaining nanomodified composites, as well as the method of characterization of carbon nanostructures is presented. Studies have shown that there is a linear dependence of the reflection coefficient on the frequency for composites modified multilayer carbon nanotubes based on Ni / 0.16 MgO catalyst. It was found that composites containing multilayer carbon nanotubes based on Ni / 0.16 MgO allow to achieve low values of the reflection coefficient and non-dependence of the reflection coefficient on the increase in frequency.

Highlights

The current state of scientific research in the field of radar absorbing coatings shows that an improvement in their characteristics can be achieved by creating new composite materials using nanoparticles [1]
The diameter of MWCNTs synthesized on a Ni / 0.16 MgO catalyst ~ 30 ÷ 60 nm
For almost all samples of composite materials with MWCNTs grown on the Ni / 0.16MgO catalyst, similar frequency dependence and similar values of the EMR transmittance are observed — a decrease from 55% to 35% in the frequency range from 8 to 40 GHz

Summary

Introduction

The current state of scientific research in the field of radar absorbing coatings shows that an improvement in their characteristics can be achieved by creating new composite materials using nanoparticles [1]. There are hierarchical (multilayer) radar absorbing composite materials based on polymer matrices with good dielectric constant, but having a narrow range of operating frequencies. This disadvantage is due to the characteristics of the composite filler. To create a new type of composite material with reduced mass and size parameters, carbon nanostructured materials (fullerene, nanotubes, graphene, etc.) can be used as filler. This argument is partially confirmed in [1]. It is possible to create composite materials based on polymers that are resistant to mechanical stress [3], erosion wear [4], as well as materials with high electrical conductivity [5, 6]

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