TY - JOUR

T1 - Influence of Carbon Nanotube Spatial Distribution on Electromagnetic Properties of Nanotube–Polymer Composites

AU - Moseenkov, Sergey I.

AU - Krasnikov, Dmitry V.

AU - Suslyaev, Valentin I.

AU - Korovin, Evgeniy Yu

AU - Dorozhkin, Kiril V.

AU - Kuznetsov, Vladimir L.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - This paper is devoted to the influence of the multi-walled carbon nanotube (MWCNT) spatial distribution within a polymer matrix on the electrophysical properties of the composite. We have studied composites with MWCNT concentrations close to the percolation threshold upon variation in (i) the morphology of the reinforcing material using MWCNTs with different aspect ratio and nanotube aggregate size (up to the average size of ≈300 µm) that were isolated from each other by thin polymer layers, and (ii) the type of the polymer matrix. The composites obtained have been characterized using optical and scanning electron microscopy, and DC conductivity measurements. A study of the electromagnetic response in microwave (0.01–18 GHz) and terahertz (100–200 GHz) ranges was performed. In the region close to and above the percolation threshold, the electrophysical properties of the composites were found to be strongly affected by the spatial distribution of MWCNTs in the composite matrix. The effect of conductive fillers (NTs) size on the EMI reflectance of the composites was different for microwave and terahertz ranges.

AB - This paper is devoted to the influence of the multi-walled carbon nanotube (MWCNT) spatial distribution within a polymer matrix on the electrophysical properties of the composite. We have studied composites with MWCNT concentrations close to the percolation threshold upon variation in (i) the morphology of the reinforcing material using MWCNTs with different aspect ratio and nanotube aggregate size (up to the average size of ≈300 µm) that were isolated from each other by thin polymer layers, and (ii) the type of the polymer matrix. The composites obtained have been characterized using optical and scanning electron microscopy, and DC conductivity measurements. A study of the electromagnetic response in microwave (0.01–18 GHz) and terahertz (100–200 GHz) ranges was performed. In the region close to and above the percolation threshold, the electrophysical properties of the composites were found to be strongly affected by the spatial distribution of MWCNTs in the composite matrix. The effect of conductive fillers (NTs) size on the EMI reflectance of the composites was different for microwave and terahertz ranges.

KW - composites

KW - dielectric properties

KW - multi-walled carbon nanotubes

KW - permittivity

KW - polymers

KW - NANOCOMPOSITES

KW - ACTIVATION

UR - http://www.scopus.com/inward/record.url?scp=85030244684&partnerID=8YFLogxK

U2 - 10.1002/pssb.201700257

DO - 10.1002/pssb.201700257

M3 - Article

AN - SCOPUS:85030244684

VL - 255

JO - Physica Status Solidi (B): Basic Research

JF - Physica Status Solidi (B): Basic Research

SN - 0370-1972

IS - 1

M1 - 1700257

ER -