The effect of nanotube surface oxidation in the electric response of MWCNT/PVDF nanocomposites

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

S. A. C. Carabineiro (Autor) FEUP; M. F. R. Pereira (Autor) FEUP; J. Nunes-Pereira (Autor) Outra; J. Silva (Autor) Outra; C. Caparros (Autor) Outra; V. Sencadas (Autor) Outra; S. Lanceros-Méndez (Autor) Outra

Revista

Título: Journal of Materials Science

Vol. 47 Nº 23

Páginas: 8103-8111

ISSN: 0022-2461

Editora: Springer Nature

Indexação

ISI Web of Science

Scopus

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Nanotecnologia

CORDIS: Ciências Físicas > Química

Outras Informações

Abstract (EN): Carbon nanotube/poly(vinylidene fluoride) (CNT/PVDF) composites were prepared using CNT with different oxidation and thermal treatments. The oxidation procedure leads to CNT with the most acidic characteristics that lower the degree of crystallinity of the polymer and contribute to a large increase of the dielectric constant. The surface treatments, in general, increase the percolation threshold and decrease conductivity. The surface treatments do not seem to affect CNT interactions and similar degrees of dispersion are achieved in all cases, as shown by the SEM results. The maximum value of the dielectric constant is *630. It is demonstrated that the composite conductivity can be attributed to a hopping mechanism that is strongly affected by the surface treatment of the CNT.

Idioma: Inglês

Tipo (Avaliação Docente): Científica