Zeta potential and doping in polyaniline dispersions

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Data

2003-01-01

Autores

de Medeiros, DWO
Santos, D. S.
Dantas, TNC
Pereira, M. R.
Giacometti, A.
Fonseca, JLC

Título da Revista

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Título de Volume

Editor

Oficyna Wydawnicza Politechniki Wroclawskiej

Resumo

Polyaniline (PAni) has been classified as an intractable polymer, particularly in its conducting form, the emeraldine salt (ES). Therefore one can consider the mixture of water and PAni as a suspension. The conducting form of PAni can be obtained by a doping process known as acid doping, in which a strong acid turns PAni from its insulating form, the emeraldine base (EB), into the conducting form, the emeraldine salt. With the objective of establishing a correlation between the doping level and the zeta potential of polyaniline dispersions, polyaniline + HCl aqueous suspensions were prepared. Positive zeta potential values for the various suspensions of PAni showed that it acquired positive charges after the doping process. It was also observed an increase in zeta potential values as HCl concentration increased, which could be correlated to UV-visible spectra of PAni suspensions.

Descrição

Palavras-chave

polyaniline, electrophoretic mobility, zeta potential, doping

Como citar

Materials Science-poland. Wroclaw: Oficyna Wydawnicza Politechniki Wroclawskiej, v. 21, n. 2, p. 251-257, 2003.

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