Effect of ultrasonic treatment on electromagnetic properties of composites based on multiwall carbon nanotubes at microwave frequency range

2016 ◽  
Author(s):  
Anastasia O. Kachusova ◽  
Olga A. Ulianova ◽  
Olga A. Dotsenko ◽  
Anna S. Polivanova
Keyword(s):  
Carbon Nanotubes ◽  
Ultrasonic Treatment ◽  
Multiwall Carbon Nanotubes ◽  
Microwave Frequency ◽  
Electromagnetic Properties ◽  
Frequency Range ◽  
Multiwall Carbon ◽  
Properties Of Composites

Anisotropy of the electromagnetic properties of polymer composites based on multiwall carbon nanotubes in the gigahertz frequency range

JETP Letters ◽  
2011 ◽  
Vol 93 (10) ◽  
pp. 607-611 ◽  
Author(s):  
D. S. Bychanok ◽  
M. A. Kanygin ◽  
A. V. Okotrub ◽  
M. V. Shuba ◽  
A. G. Paddubskaya ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Polymer Composites ◽  
Multiwall Carbon Nanotubes ◽  
Electromagnetic Properties ◽  
Frequency Range ◽  
Multiwall Carbon

Preparation and electromagnetic properties of the BaFe12 O19 /multiwall carbon nanotubes/poly(3-methyl-thiophene) composites

2013 ◽  
Vol 34 (11) ◽  
pp. 1801-1808 ◽  
Author(s):  
Jie Zhao ◽  
Yu Xie ◽  
Zhanggao Le ◽  
Yan Luo ◽  
Yunhua Gao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwall Carbon Nanotubes ◽  
Electromagnetic Properties ◽  
Multiwall Carbon

Research of Electromagnetic Properties of Composite Materials on the Basis of MWNTs in Microwave Range

2014 ◽  
Vol 1040 ◽  
pp. 142-147
Author(s):  
Valentine I. Suslyaev ◽  
Vladimir L. Kuznetsov ◽  
S.I. Moseenkov ◽  
Evgeniy Yu. Korovin ◽  
D.V. Krasnikov
Keyword(s):  
Carbon Nanotubes ◽  
Composite Materials ◽  
Structural Parameters ◽  
Multiwall Carbon Nanotubes ◽  
Dielectric Permeability ◽  
Electromagnetic Properties ◽  
Microwave Range ◽  
Multilayer Carbon Nanotubes ◽  
Multiwall Carbon ◽  
Parameters Calculation

In this paper electromagnetic properties of composite materials based on polymethylmethacrylate and multiwall carbon nanotubes (MWCNTs) are investigated. Carbon nanotubes are received with application of various types of catalysts and have various structural parameters. Calculation of dielectric permeability of the synthesised materials is carried out. Dependence of electromagnetic properties of composite materials on concentration and structure used multilayer carbon nanotubes is shown.

Microwave Absorbing Nanocomposites Composed with and without Polyaniline by Use as Radar Absorbing Structure

2012 ◽  
Vol 730-732 ◽  
pp. 920-924 ◽  
Author(s):  
Luiza de Castro Folgueras ◽  
Mirabel Cerqueira Rezende
Keyword(s):  
Carbon Nanotubes ◽  
Multiwall Carbon Nanotubes ◽  
Chemical Properties ◽  
Woven Fabric ◽  
Electromagnetic Properties ◽  
Naval Research ◽  
Radar Absorbing Structure ◽  
Physical And Chemical ◽  
Multiwall Carbon ◽  
And Chemical Properties

In the past decade, new materials have been developed based on the physical and chemical properties of carbon nanotubes. The combination of polyaniline with multiwall carbon nanotubes results in a new functional material with advantageous electromagnetic properties. The objective of this study was to produce a radar absorbing structure consisting of glass fiber woven fabric impregnated with a formulation containing carbon nanotubes, polyurethane resin, with or without polyaniline. A different formulation was used for each woven sheet (multilayer structure). The electromagnetic properties of these nanocomposite materials were characterized by reflectivity measurements using Naval Research Laboratory arch method (frequency range, 8 to 12 GHz). The attenuation of both sides of each nanocomposite material was also measured and compared. The attenuation of electromagnetic energy was as high as 70 %, approximately, indicating that these materials can be used as microwave absorbers.

Microwave Properties of Nanocomposites: Effect of Manufacturing Methods and Nanofiller Structure

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
A. A. Khurram ◽  
Sobia A. Rakha ◽  
Naveed Ali ◽  
I. H. Gul ◽  
Arshad Munir
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Return Loss ◽  
Epoxy Composite ◽  
Multiwall Carbon Nanotubes ◽  
Frequency Range ◽  
Epoxy Nanocomposite ◽  
Surface Functionality ◽  
Dc Electrical Conductivity ◽  
Multiwall Carbon

Nanocomposite materials filled with multiwall carbon nanotubes (MWCNTs) having three types of structures, i.e., longer (200 μm), shorter (20–50 μm), and aminated (20–50 μm), are manufactured for microwave absorption (MA) in 11–17 GHz frequency range. Microstructure, dielectric permittivity, direct current (DC) electrical conductivity, and MA properties of the MWCNTs–epoxy nanocomposite were investigated. A correlation has been developed between the structure (aspect ratio and surface functionality) of MWCNTs, electrical conductivity of the composite, and MA (return loss (RL)). E-glass/epoxy composite filled with longer carbon nanotubes (CNTs) has shown higher RL as compared to that of other two nanocomposites. The measurements have shown that the magnitude of RL of microwaves depends strongly on the structure of MWCNTs used in the composite. Furthermore, the effect of synthesis route followed for the manufacturing of nanocomposite on its electrical conductivity and microwave absorbing properties is also investigated; three different approaches were followed to manufacture CNT/epoxy nanocomposites from longer CNTs (200 μm).

Influence of Ultrasonic Treatment on Electromagnetic Characteristics of Composites Based on Multiwall Carbon Nanotubes at Microwave Frequencies

2016 ◽  
Vol 683 ◽  
pp. 65-70 ◽  
Author(s):  
Olga Dotsenko ◽  
Anastasia Kachusova
Keyword(s):  
Carbon Nanotubes ◽  
Dielectric Properties ◽  
Multiwalled Carbon Nanotubes ◽  
Ultrasonic Treatment ◽  
Multiwall Carbon Nanotubes ◽  
Multiwalled Carbon ◽  
Microwave Frequencies ◽  
Absorbing Materials ◽  
Electromagnetic Characteristics ◽  
Multiwall Carbon

There is a growing demand for light and radar absorbing materials in both commercial and military purposes. In this paper, microwave properties of polimer based composites containing multiwalled carbon nanotubes used as fillers have been analyzed. The multiwall carbon nanotubes used in the composite were about 9.4 nm in diameter. The results show that the ultrasonic treatment modifies the dielectric properties of the composite. Both real and imaginary permittivity of composites is 2 times more than ordinary example after sonicating for 3 minutes.

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