Increasing the dielectric breakdown strength of poly(ethylene terephthalate) films using a coated polyaniline layer
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Data
2003-06-21
Autores
Job, A. E.
Alves, Neri [UNESP]
Zanin, M.
Ueki, M. M.
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Iop Publishing Ltd
Resumo
The dielectric strength of films made from poly(ethylene terephthalate) (PET) coated with a thin layer of polyaniline (PANI) was studied. The PANI layer was deposited on the PET films by the 'in situ' chemical polymerization method. The PANI layer of the PANI/PET films was undoped in NH4OH 0.1 M solution and re-doped with aqueous HCl solution under different pH values varying from 1 to 10. Electric breakdown measurements were performed by applying a voltage ramp and the results showed a dependence of the dielectric strength on the pH of the doping solution due to the changes in the electrical conductivity of the PANI layer. The dielectric strength of PET/PANI films treated under higher pH conditions showed an electric strength about 30% larger than the PET films, since it leads to a non-conductive PANI layer.
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Journal of Physics D-applied Physics. Bristol: Iop Publishing Ltd, v. 36, n. 12, p. 1414-1417, 2003.