Abstract
Montmorillonite (MMT)-based nanocomposites of polypyrrole (PPY) were prepared through the polymerization of pyrrole with MMT and FeCl 3-impregnated MMT in bulk and in aqueous medium. The composites were characterized by IR, X-ray diffraction (XRD), and scanning electron microscopy (SEM) studies. XRD analyses revealed no change in d 001 spacing in MMT (9.8 Å), suggesting no intercalation of PPY into MMT lamellae. TEM analysis indicated the particle size to be 25 ± 7 nm. The bulk conductivity of the composites was in the range of (1.3 to 26) × 10 −5 S/cm, depending on the FeCl 3-impregnation level and on the PPY loading in the composites. Suitable procedures were developed for obtaining a stable aqueous dispersion and a reversible dispersion of these composites.
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