Publicação

The role of disorder on the AC and DC electrical conductivity of vapour grown carbon nanofibre/epoxy composites

Detalhes bibliográficos
Resumo:	Four dispersion methods were used for the preparation of vapour grown carbon nanofibre (VGCNF)/epoxy composites. It is shown that each method induces certain levels of VGCNF dispersion and distribution within the matrix, and that these have a strong influence on the composite electrical properties. A homogenous VGCNF dispersion does not necessarily imply higher electrical conductivity. In fact, it is concluded that the presence of well distributed clusters, rather than a fine dispersion, is more important for achieving larger conductivities for a given VGCNF concentration. It is also found that the conductivity can be described by a weak disorder regime.
Autores principais:	Cardoso, Paulo
Outros Autores:	Silva, J.; Klosterman, D.; Covas, J. A.; Hattum, F. W. J. van; Simões, Ricardo; Lanceros-Méndez, S.
Assunto:	Nano composites Polymer matrix composites Electrical properties Polymer-matrix composites (PMCs) A. Nano composites A. Polymer-matrix composites (PMCs) B. Electrical properties
Ano:	2012
País:	Portugal
Tipo de documento:	artigo
Tipo de acesso:	acesso restrito
Instituição associada:	Universidade do Minho
Idioma:	inglês
Origem:	RepositóriUM - Universidade do Minho

Descrição
Resumo:	Four dispersion methods were used for the preparation of vapour grown carbon nanofibre (VGCNF)/epoxy composites. It is shown that each method induces certain levels of VGCNF dispersion and distribution within the matrix, and that these have a strong influence on the composite electrical properties. A homogenous VGCNF dispersion does not necessarily imply higher electrical conductivity. In fact, it is concluded that the presence of well distributed clusters, rather than a fine dispersion, is more important for achieving larger conductivities for a given VGCNF concentration. It is also found that the conductivity can be described by a weak disorder regime.