Abstract

RESTREPO, HÉCTOR FABIÁN; CERVERA, JESÚS GEOFFREY  and  ALONSO HOYOS, BIBIAN. POLY-ANILINE SYNTHESIS BY ELECTROCHEMICAL OXIDATION. Dyna rev.fac.nac.minas [online]. 2005, vol.72, n.147, pp.57-63. ISSN 0012-7353.

In this work it was studied the temperature and initial monomer concentration (aniline) effect upon the morphology and conductivity of polyaniline obtained by electro-polymerization with cyclic voltammetry on glassy carbon supports. The initial aniline salt was characterized by Infrared Analysis (I.R.). The morphology of the obtained polyaniline was analyzed by Scanning Electronic Microscopy (S.E.M.), and conductivity by Electrochemical Impedance Spectroscopy (E.I.S.). The obtained results show a polymerization rate increase and polymer morphology changes with the increase of temperature and monomer concentration. The S.E.M. analysis shows three kinds of polymer formations for different polymerization parameters: spangles, filaments and granules. The EIS results show higher polymer conductivity and capacitance at high temperatures and high concentrations.

Keywords : Electro-polymerization; Aniline; Polymeric conductivity.

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