A comparative study of EMI shielding properties of carbon nanofiber and multi-walled carbon nanotube filled polymer composites.
J Nanosci Nanotechnol
; 5(6): 927-31, 2005 Jun.
Article
em En
| MEDLINE
| ID: mdl-16060155
ABSTRACT
Electromagnetic interference shielding properties of carbon nanofiber- and multi-walled carbon nanotube-filled polystyrene composites were investigated in the frequency range of 8.2-12.4 GHz (X-band). It was observed that the shielding effectiveness of composites was frequency independent, and increased with the increase of carbon nanofiber or nanotube loading. At the same filler loading, multi-walled carbon nanotube-filled polystyrene composites exhibited higher shielding effectiveness compared to those filled with carbon nanofibers. In particular, carbon nanotubes were more effective than nanofibers in providing high EMI shielding at low filler loadings. The experimental data showed that the shielding effectiveness of the composite containing 7 wt% carbon nanotubes could reach more than 26 dB, implying that such a composite can be used as a potential electromagnetic interference shielding material. The dominant shielding mechanism of carbon nanotube-filled polystyrene composites was also discussed.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteção Radiológica
/
Nanotubos de Carbono
/
Campos Eletromagnéticos
/
Micro-Ondas
Tipo de estudo:
Evaluation_studies
Idioma:
En
Revista:
J Nanosci Nanotechnol
Ano de publicação:
2005
Tipo de documento:
Article
País de afiliação:
Estados Unidos