Temperature dependence of the electrical conductivity of vapor grown carbon nanofiber/epoxy composites with different filler dispersion levels

Utilize este identificador para referenciar este registo: https://hdl.handle.net/1822/21881

Título:	Temperature dependence of the electrical conductivity of vapor grown carbon nanofiber/epoxy composites with different filler dispersion levels
Autor(es):	Cardoso, Paulo Silva, J. Moreira, J. Agostinho Klosterman, D. Hattum, F. W. J. van Simões, Ricardo Lanceros-Méndez, S.
Palavras-chave:	Composite materials Polymer-based composites Percolation Low temperature measurements
Data:	2012
Editora:	Elsevier Science BV
Revista:	Physics Letters A
Resumo(s):	The influence of the dispersion of vapor grown carbon nanofibers (VGCNF) on the electrical properties of VGCNF/epoxy composites has been studied. A homogeneous dispersion of the VGCNF does not imply better electrical properties. The presence of well distributed clusters appears to be a key factor for increasing composite conductivity. It is also shown that the main conduction mechanism has an ionic nature for concentrations below the percolation threshold, while above the percolation threshold it is dominated by hopping between the fillers. Finally, using the granular system theory it is possible to explain the origin of conduction at low temperatures.
Tipo:	Artigo
URI:	https://hdl.handle.net/1822/21881
DOI:	10.1016/j.physleta.2012.09.045
ISSN:	0375-9601
Arbitragem científica:	yes
Acesso:	Acesso restrito UMinho
Aparece nas coleções:	IPC - Artigos em revistas científicas internacionais com arbitragem