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Ion exchange properties of polyaniline: potentiometric measurements on membranes and coated wire electrodes

✍ Scribed by F.B. Diniz; K.C.S. de Freitas; W.M. de Azevedo

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
454 KB
Volume
42
Category
Article
ISSN
0013-4686

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✦ Synopsis

Mixtures of polyaniline

with different polymeric materials were used in order to obtain mechanically stable matrices employed to prepare membranes and coated platinum electrodes. Potentiometric measurements were carried out in aqueous solutions containing either salts or acids of several anions. These measurements indicate that the matrices are more permeable to anions than to cations. The results obtained are dependent upon the radii and charge of the anions investigated. Also, the ionic mobility inside the matrices appears to be higher for protons than for other cations.

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