The effect of nanotube surface oxidation on the electrical properties of multiwall carbon nanotube/poly(vinylidene fluoride) composites

Authors

S A. Carabineiro, Universidade Do Porto
Manuel F. Pereira, Universidade Do Porto
J Nunes-Pereira, University of Minho
J P. Silva, University of Minho
Cristina Caparrós, University of Minho
Vitor Sencadas, University of WollongongFollow
Senentxu Lanceros-Méndez, University of Minho

RIS ID

99237

Publication Details

Carabineiro, S. A. C.., Pereira, M. F. R.., Nunes-Pereira, J., Silva, J., Caparrós, C., Sencadas, V. & Lanceros-Méndez, S. (2012). The effect of nanotube surface oxidation on the electrical properties of multiwall carbon nanotube/poly(vinylidene fluoride) composites. Journal of Materials Science, 47 (23), 8103-8111.

Abstract

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.