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

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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.

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Acknowledgements

The authors thank the Fundação para a Ciência e a Tecnologia (FCT), Portugal, for financial support through the projects PTDC/CTM/69316/2006 and NANO/NMed-SD/0156/2007), and CIENCIA 2007 program for S.A.C.; V.S., J.S. and J.N.P. also thank FCT for the SFRH/BPD/63148/2009, SFRH/BD/60623/2009 and SFRH/BD/66930/2009 grants.

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Authors and Affiliations

  1. Laboratório de Catálise e Materiais (LCM), Laboratório Associado LSRE/LCM, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, s/n, 4200-465, Porto, Portugal

    S. A. C. Carabineiro & M. F. R. Pereira

  2. Centro/Departamento de Física da Universidade do Minho, Campus de Gualtar, 4710-057, Braga, Portugal

    J. Nunes-Pereira, J. Silva, C. Caparros, V. Sencadas & S. Lanceros-Méndez

  3. Institute for Polymers and Composites (IPC), University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal

    V. Sencadas

  4. International Iberian Nanotechnology Laboratory (INL), 4715-330, Braga, Portugal

    S. Lanceros-Méndez

Authors
  1. S. A. C. Carabineiro
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  2. M. F. R. Pereira
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  3. J. Nunes-Pereira
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  4. J. Silva
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  5. C. Caparros
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  6. V. Sencadas
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  7. S. Lanceros-Méndez
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Correspondence to S. Lanceros-Méndez.

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Carabineiro, S.A.C., Pereira, M.F.R., Nunes-Pereira, J. et al. The effect of nanotube surface oxidation on the electrical properties of multiwall carbon nanotube/poly(vinylidene fluoride) composites. J Mater Sci 47, 8103–8111 (2012). https://doi.org/10.1007/s10853-012-6705-7

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  • DOI: https://doi.org/10.1007/s10853-012-6705-7

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