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Synthesis, Characterization, and Electrokinetic Properties of Polyindene/Colemanite Conducting Composite

Published online by Cambridge University Press:  01 January 2024

Berrak Cetin ,
Halil Ibrahim Unal  and
Ozlem Erol
Berrak Cetin
Affiliation:
Smart Materials Research Lab, Department of Chemistry, University of Gazi, Ankara, Turkey
Halil Ibrahim Unal*
Affiliation:
Smart Materials Research Lab, Department of Chemistry, University of Gazi, Ankara, Turkey
Ozlem Erol
Affiliation:
Smart Materials Research Lab, Department of Chemistry, University of Gazi, Ankara, Turkey
*
*E-mail address of corresponding author: [email protected]
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Abstract

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The aim of the aqueous electrokinetic experiments in the present study was to assess the relative contribution of the conducting polyindene (PIn) and inorganic colemanite components to the zeta (ζ) potentials of the composite particles, thus providing further insight into their surface composition in the dispersed state and establishing colloidally stable conditions for potential rheological, industrial applications. For this, PIn and a PIn/colemanite composite (containing 5 wt.% colemanite) were synthesized by chemical oxidative polymerization using FeCl3 as an oxidizing agent. Colemanite, PIn, and PIn/colemanite composite samples were characterized by Fourier-transform infrared spectroscopy, elemental analysis, conductivity, dielectric constant, magnetic susceptibility, density, particle-size measurements, thermogravimetric analysis, differential scanning calorimetry, X-ray diffraction analysis, and scanning electron microscopy methods. The electrokinetic properties of colemanite and PIn/colemanite composite dispersions were determined by ζ-potential measurements in aqueous medium, taking into account the effects of time, pH, various electrolytes, surfactants, and temperature. The pH was observed to have a greater effect on the ζ potentials of colemanite in water but caused only slight changes in the presence of cationic (NaCl, BaCl2, AlCl3) and anionic (NaCl, Na2SO4) electrolytes. Increased pH values shifted the ζ potentials of PIn/colemanite composite dispersions to more negative values. The most effective surfactant acting on the ζ potentials of colemanite and PIn/colemanite composite dispersions was cetyltrimethylammonium bromide (CTAB), which shifted the ζ potentials to more positive regions. Elevated temperatures caused almost no change to the ζ potentials of either the colemanite or the PIn/colemanite composite dispersions.

Keywords

ColemaniteConducting CompositeElectrokineticsPolyindene
Type
Article
Information
Clays and Clay Minerals , Volume 60 , Issue 3 , June 2012 , pp. 300 - 314
Copyright
Copyright © Clay Minerals Society 2012

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