Electrical and dielectric properties of polyaniline and polyaniline/montmorillonite nanocomposite prepared by solid reaction using spectroscopy impedance

The combination of two components with uniform distribution in nanoscale is expected to facilitate wider applications of the material. In this study, polyaniline (PAn) and polyaniline/montmorillonite (Mt) nanocomposite were prepared by solid reaction using persulfate of ammonium as oxidant. The phase composition and morphology of the nanocomposite were characterized by FTIR, UV-visible spectroscopy, X-ray diffractometer, thermal gravimetric analysis, and scanning electron microscopy. The electrical and dielectric properties were determined using spectroscopy impedance. The analysis of UV-visible and FTIR spectroscopy demonstrated that aniline chloride has been polymerized into PAn in its conducting emeraldine form. Thermogravimetric analysis suggested that PAn chains intercalated in the clay host are more thermally stable than those of free PAn prepared by solid-solid reaction. Electrical measurements were carried out using the complex impedance technique in the frequency range of 10-2 to 104 Hz at different temperatures. The ac conductivity data of different nanocomposites were analyzed as a function of frequency and temperature. It has been found that the incorporation of inorganic clay phase into polyaniline matrix has an effect on the electrical and dielectric properties of the nanomaterial.

[1]  B. L. Weeks,et al.  Electropolymerized polyaniline/manganese iron oxide hybrids with an enhanced color switching response and electrochemical energy storage , 2015 .

[2]  S. Madeswaran,et al.  Dielectric studies on struvite urinary crystals, a gateway to the new treatment modality for urolithiasis. , 2015, Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy.

[3]  M. J. Soares,et al.  Structural, electrical and dielectric characterization of TeO2–WO3–Y2O3–Er2O3–Yb2O3 glasses , 2015 .

[4]  M. Gargouri,et al.  AC conductivity and mechanism of conduction study of lithium barium pyrophosphate Li2BaP2O7 using impedance spectroscopy , 2015, Ionics.

[5]  H. Xin,et al.  Giant Magnetoresistive Phosphoric Acid Doped Polyaniline–Silica Nanocomposites , 2013 .

[6]  Qiang Wang,et al.  Magnetoresistive polyaniline-magnetite nanocomposites with negative dielectrical properties , 2012 .

[7]  E. Srasra,et al.  Solid state polymerization and intercalation of aniline in Fe rich montmorillonite , 2011 .

[8]  E. Srasra,et al.  Characterization and AC conductivity of polyaniline–montmorillonite nanocomposites synthesized by mechanical/chemical reaction , 2010 .

[9]  Arup Choudhury,et al.  Polyaniline/silver nanocomposites: Dielectric properties and ethanol vapour sensitivity , 2009 .

[10]  Yanmo Chen,et al.  Preparation of magnetic and conductive NiZn ferrite-polyaniline nanocomposites with core-shell structure , 2006 .

[11]  Jean-Luc Duvail,et al.  Electrical and magnetic properties of polyaniline/Fe3O4 nanostructures , 2005 .

[12]  T. Aminabhavi,et al.  Novel high dielectric constant nanocomposites of polyaniline dispersed with γ-Fe2O3 nanoparticles† , 2005 .

[13]  A. De,et al.  Characterization and dielectric properties of polyaniline?TiO2 nanocomposites , 2004 .

[14]  J. Bisquert,et al.  Interpretation of AC Conductivity of Lightly Doped Conducting Polymers in Terms of Hopping Conduction , 2004 .

[15]  O. Anunziata,et al.  Thermal and FTIR spectroscopic analysis of the interactions of aniline adsorbed on to MCM-41 mesoporous material. , 2003, Journal of colloid and interface science.

[16]  S. M. Yang,et al.  Synthesis of polyaniline-modified montmorillonite nanocomposite , 2003 .

[17]  S. Yariv,et al.  Montmorillonite treated with Rhodamine-6G mechanochemically and in aqueous suspensions , 2002 .

[18]  A. Epstein,et al.  Nanocomposite of Polyaniline and Na+-Montmorillonite Clay , 2002 .

[19]  G. Rothenberg,et al.  Understanding solid/solid organic reactions. , 2001, Journal of the American Chemical Society.

[20]  K. Kuroda,et al.  Solid-state intercalation of 4,4′-bipyridine and 1,2-di(4-pyridine) ethylene into the interlayer spaces of Co(II)-, Ni(II)- and Cu(II)-montmorillonites , 2001 .

[21]  J. Joo,et al.  Physical characterization of polyaniline-Na+-montmorillonite nanocomposite intercalated by emulsion polymerization , 2001 .

[22]  B. Feng,et al.  Electropolymerization of polyaniline/montmorillonite nanocomposite , 2001 .

[23]  T. Nakato,et al.  Intercalation compound of VOPO4.2H2O with acrylamide: preparation and exfoliation , 2001 .

[24]  S. Yariv,et al.  The Effect of Mechanochemical Treatments on Clay Minerals and the Mechanochemical Adsorption of Organic Materials onto Clay Minerals , 2000 .

[25]  A. Epstein,et al.  Structural investigation of metallic PAN-CSA and some of its derivatives , 1995 .

[26]  K. Lazar,et al.  Solid-state ion exchange in zeolites. Part 5.—NH4-Y–iron(II) chloride , 1994 .

[27]  E. Geniés,et al.  A rechargeable battery of the type polyaniline/propylene carbonate-LiClO4/Li-Al , 1988 .

[28]  G. G. Miller,et al.  Electrical and optical properties of highly conducting charge-transfer complexes of poly(p-phenylene) , 1980 .

[29]  H. Olphen.  An Introduction to Clay Colloid Chemistry , 1977 .

[30]  R. Nurse.  An Introduction to Clay Colloid Chemistry , 1965 .