Effect of the Morphology and Structure on the Microwave Absorbing Properties of Multiwalled Carbon Nanotube Filled Epoxy Resin Nanocomposites

The current research shows the effect of structural and morphological differences of multilayer carbon nanotubes (CNT) on radar absorbing materials (RAM) performance. Two CNT samples, from different manufacturers, had their morphological and structural aspects investigated by XRD, SEM and SEM-FEG an...

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Bibliographic Details
Published inMaterials research (São Carlos, São Paulo, Brazil) Vol. 21; no. 5; p. 1
Main Authors Silva, Valdirene Aparecida da, Rezende, Mirabel Cerqueira
Format Journal Article
LanguageEnglish
Portuguese
Published Sao Carlos Universidade Federal do Sao Carlos, Departamento de Engenharia de Materiais 01.01.2018
ABM, ABC, ABPol
Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
Subjects
Agglomerates
Carbon nanotubes
Carbon-epoxy composites
Dielectric properties
Electrical resistivity
ENGINEERING, CHEMICAL
Epoxy resins
MATERIALS SCIENCE, MULTIDISCIPLINARY
METALLURGY & METALLURGICAL ENGINEERING
Morphology
Multi wall carbon nanotubes
Multilayers
Nanocomposites
Nanotubes
Polymer matrix composites
Radar absorbers
Radar absorbing materials
Reflectivity
SEM
Wave attenuation
XRD
Reflectivity
Carbon nanotubes
SEM
XRD
Radar absorbing materials
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Summary:The current research shows the effect of structural and morphological differences of multilayer carbon nanotubes (CNT) on radar absorbing materials (RAM) performance. Two CNT samples, from different manufacturers, had their morphological and structural aspects investigated by XRD, SEM and SEM-FEG analyses. CNT/epoxy resin based nanostructured composites were prepared and characterized by reflectivity measurements in the X-band. SEM results show the formation of agglomerates in the composites and the XRD patterns show structural differences between the two CNT samples. The best RAM performance (-25 dB) was determined for the nanocomposite based on the CNT with the smallest stacking layers (Lc = 26.9 Å) associated to the longest length of nanofilament (10-20 µm). This characteristic can have contributed to the formation of an interconnected network in the composite favoring electrical conductivity and dielectric properties, with the consequent increase of the wave attenuation.
ISSN:1516-1439
1980-5373
1980-5373
DOI:10.1590/1980-5373-mr-2017-0977