Química Nova (Oct 2007)

Nanocompósitos eletroativos de poli-o-metoxianilina e polissacarídeos naturais Electroactive nanocomposites made of poly (o-methoxyaniline) and natural polysaccharides

  • Carla Eiras,
  • Ionara Nayana Gomes Passos,
  • Ana Cristina Facundo de Brito,
  • José Ribeiro dos Santos Júnior,
  • Valtencir Zucolotto,
  • Osvaldo N. Oliveira Jr,
  • Igor L. Kitagawa,
  • Carlos J. L. Constantino,
  • Helder Nunes da Cunha

DOI
https://doi.org/10.1590/S0100-40422007000500020
Journal volume & issue
Vol. 30, no. 5
pp. 1158 – 1162

Abstract

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In this work we take advantage of the polyelectrolyte character of some Brazilian native gums to fabricate electrically conductive, nanostructured films. The gums Sterculia urens, (caraia), Sterculia striata (chicha) or Anadenanthera macrocarpa Benth were assembled in conjunction with poly(o-methoxyaniline) (POMA) in the form of layered nanostructured films using the layer-by-layer (LbL) technique. All the LbL films displayed a well-defined electroactivity, as confirmed via cyclic voltammetry. In comparison to POMA LbL films fabricated with conventional polyelectrolytes (viz. poly(vinyl sulfonic acid)-PVS), the presence of the gums in the LbL films increased remarkably the electrochemical stability of the films.

Keywords