Submicrometric Fibrillar Structures of Codoped Polyaniline Obtained by Co-oxidation Using the NaClO/Ammonium Peroxydisulfate System: Synthesis and Characterization

  • Jorge Enrique Osorio-Fuente Instituto Politécnico Nacional
  • Carlos Gómez-Yáñez Instituto Politécnico Nacional
  • María de los Ángeles Hernández-Pérez Instituto Politécnico Nacional
  • Mónica de la Luz Corea-Téllez Instituto Politécnico Nacional
Keywords: Polyaniline, Nanofibers, Codoping, Co-oxidant

Abstract

A mixture of ammonium peroxydisulfate and sodium hypochlorite (NaClO) (co-oxidating system) were used to obtain polyaniline (PANi) doped with HCl and camphorsulfonic acid (CSA) (co-doping). The effect of HCl/CSA ratio added during polymerization on structure, morphology and electrical conductivity of the conducting polymer was investigated. When NaClO is used, the polymerization rate is substantially increased and the morphology changes from micrometric granular to nanometric fibrillar. CSA was used as complementary dopant but also to improve the solubility of PANi in common solvents. However, results suggest that quinone-like heterocycles containing carbonyl radicals as well as phenazine-type aromatic rings might be impeding an efficient doping in detriment of the conductivity.

Author Biographies

Jorge Enrique Osorio-Fuente, Instituto Politécnico Nacional
Departamento de Ingeniería en Metalurgia y Materiales, ESIQIE
Carlos Gómez-Yáñez, Instituto Politécnico Nacional
Departamento de Ingeniería en Metalurgia y Materiales, ESIQIE
María de los Ángeles Hernández-Pérez, Instituto Politécnico Nacional
Departamento de Ingeniería en Metalurgia y Materiales, ESIQIE
Mónica de la Luz Corea-Téllez, Instituto Politécnico Nacional
Departamento de Formación Básica, ESIQIE
Published
10-12-2017