Journal
SYNTHETIC METALS
Volume 145, Issue 2-3, Pages 265-270Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2004.05.011
Keywords
polyaniline; montmorillonite; intercalation; mechanochemical
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Nanocomposites consisting of conducting polyaniline (PANI) and montmorillonite (MMT) were synthesized by the mechanochemical intercalation method. The mixtures of sodium MMT and anilinium chloride were mechanochemically ground in a mortar. X-ray diffraction (XRD) analysis confirmed that anilinium cations, which are the monomer of PANI, were intercalated into MMT by a cation-exchange reaction between the sodium cations of MMT and the anilinium cations of anilinium chloride. The basal spacing of the anilinium-MMT intercalation compound significantly expanded from 0.96 to 2.47 nm by adding an excess amount of anilinium chloride. After polymerization by the mechanochemical grinding with ammonium peroxodisulfate in a mortar, a decrease in the basal spacing to 1.33 nm was observed, indicating that PANI was synthesized between the interlayer spaces of MMT. It was further characterized by Fourier transform infrared (FT-IR) spectroscopy. The result of thermogravimetric analysis showed the improved thermal stability of PANI due to modification of the incorporated MMT. (C) 2004 Elsevier B.V. All rights reserved.
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