Nanostructured composites based on carbon nanotubes and epoxy resin for use as radar absorbing materials
AUTOR(ES)
Silva, Valdirene Aparecida, Folgueras, Luiza de Castro, Cândido, Geraldo Maurício, Paula, Adriano Luiz de, Rezende, Mirabel Cerqueira, Costa, Michelle Leali
FONTE
Mat. Res.
DATA DE PUBLICAÇÃO
03/09/2013
RESUMO
Nanostructured polymer composites have opened up new perspectives for multifunctional materials. In particular, carbon nanotubes (CNTs) present potential applications in order to improve mechanical and electrical performance in composites with aerospace application. The combination of epoxy resin with multiwalled carbon nanotubes results in a new functional material with enhanced electromagnetic properties. The objective of this work was the processing of radar absorbing materials based on formulations containing different quantities of carbon nanotubes in an epoxy resin matrix. To reach this objective the adequate concentration of CNTs in the resin matrix was determined. The processed structures were characterized by scanning electron microscopy, rheology, thermal and reflectivity in the frequency range of 8.2 to 12.4 GHz analyses. The microwave attenuation was up to 99.7%, using only 0.5% (w/w) of CNT, showing that these materials present advantages in performance associated with low additive concentrations.
Documentos Relacionados
- Composite materials based on modified epoxy resin and carbon fiber
- Frequency Selective Surface Properties of Microwave New Absorbing Porous Carbon Materials Embedded in Epoxy Resin
- Effective functionalization of carbon nanotubes for bisphenol F epoxy matrix composites
- Radar absorbing materials based on titanium thin film obtained by sputtering technique
- Complex permeability and permittivity variation of radar absorbing materials based on MnZn ferrite in microwave frequencies