Fabrication process and electromagnetic wave absorption characterization of a CNT/Ni/epoxy nanocomposite.
J Nanosci Nanotechnol
; 13(11): 7669-74, 2013 Nov.
Article
em En
| MEDLINE
| ID: mdl-24245312
ABSTRACT
Since carbon nanotube (CNT) was first discovered in 1991, it has been considered as a viable type of conductive filler for electromagnetic wave absorption materials in the GHz range. In this paper, pearl-necklace-structure CNT/Ni nano-powders were fabricated by a polyol process as conductive fillers. Compared to synthesized CNT, pearl-necklace Ni-decorated CNT increased the electrical conductivity by an order of 1 due to the enhancement of the Ni-conductive network. Moreover, the decorated Ni particles prevented the agglomeration of CNTs by counterbalancing the Van der Walls interaction between the CNTs. A CNT/Ni nanocomposite showed a homogeneous dispersion in an epoxy-based matrix. This enhanced physical morphology and electrical properties lead to an increase in the loss tangent and reflection loss in the CNT/Ni/Epoxy nanocomposite compared to these characteristics of a CNT/Epoxy nanocomposite in range of 8-12 GHz. The electromagnetic wave absorption properties of CNT/Ni/epoxy nanocomposites will provide enormous opportunities for electronic applications where lightweight EMI shielding or electro-magnetic wave absorption properties are necessary.
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Base de dados:
MEDLINE
Assunto principal:
Nanotubos de Carbono
/
Resinas Epóxi
/
Níquel
Idioma:
En
Revista:
J Nanosci Nanotechnol
Ano de publicação:
2013
Tipo de documento:
Article