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Electrical properties of intrinsically conductive core-shell polypyrrole/poly(vinylidene fluoride) electrospun fibers

Journal Article


Abstract


  • Polypyrrole (PPy) has been synthesized as an homogeneous layer on the fibers of electroactive poly(vinylidene fluoride) (PVDF) electrospun mats via in-situ polymerization of pyrrole (Py). A core-sheath structure was obtained, the electrical conductivity depending on synthesis time, which influences the morphology and thickness of PPy layer. An overall dc conductivity of 70 ± 4 S m-1 was obtained for the sample with a PPy layer of 160 ± 25 nm. Further, the thermal coefficient of resistivity obtained for the sample after 120 min in-situ polymerization is almost twice the one calculated for the sample with 5 min synthesis time. The temperature dependence of the electrical dc conductivity of the PPy/PVDF membranes gives evidence of a transport mechanism based on Mott's variable range hopping model. Using this model, values for the density of states, hopping energy and distance were assessed.

UOW Authors


  •   Dias, J C. (external author)
  •   Correia, Daniela M. (external author)
  •   Botelho, Gabriela (external author)
  •   Lanceros-Méndez, Senentxu (external author)
  •   Gomes da Silva Sencadas, Vitor

Publication Date


  • 2014

Citation


  • Dias, J. C., Correia, D. M., Botelho, G., Lanceros-Méndez, S. & Sencadas, V. (2014). Electrical properties of intrinsically conductive core-shell polypyrrole/poly(vinylidene fluoride) electrospun fibers. Synthetic Metals, 197 198-203.

Scopus Eid


  • 2-s2.0-84907504487

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3679

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 198

End Page


  • 203

Volume


  • 197

Place Of Publication


  • Switzerland

Abstract


  • Polypyrrole (PPy) has been synthesized as an homogeneous layer on the fibers of electroactive poly(vinylidene fluoride) (PVDF) electrospun mats via in-situ polymerization of pyrrole (Py). A core-sheath structure was obtained, the electrical conductivity depending on synthesis time, which influences the morphology and thickness of PPy layer. An overall dc conductivity of 70 ± 4 S m-1 was obtained for the sample with a PPy layer of 160 ± 25 nm. Further, the thermal coefficient of resistivity obtained for the sample after 120 min in-situ polymerization is almost twice the one calculated for the sample with 5 min synthesis time. The temperature dependence of the electrical dc conductivity of the PPy/PVDF membranes gives evidence of a transport mechanism based on Mott's variable range hopping model. Using this model, values for the density of states, hopping energy and distance were assessed.

UOW Authors


  •   Dias, J C. (external author)
  •   Correia, Daniela M. (external author)
  •   Botelho, Gabriela (external author)
  •   Lanceros-Méndez, Senentxu (external author)
  •   Gomes da Silva Sencadas, Vitor

Publication Date


  • 2014

Citation


  • Dias, J. C., Correia, D. M., Botelho, G., Lanceros-Méndez, S. & Sencadas, V. (2014). Electrical properties of intrinsically conductive core-shell polypyrrole/poly(vinylidene fluoride) electrospun fibers. Synthetic Metals, 197 198-203.

Scopus Eid


  • 2-s2.0-84907504487

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3679

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 198

End Page


  • 203

Volume


  • 197

Place Of Publication


  • Switzerland