Morphology and conductivity tuning of polyaniline using short-chain alcohols by heterophase polymerization

Miguel A. Corona-Rivera, Víctor M. Ovando-Medina, Hugo Martínez-Gutiérrez, Francisca E. Silva-Aguilar, Elías Pérez, Iveth D. Antonio-Carmona

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

10 Citas (Scopus)

Resumen

Conducting polyaniline (PANI) nanostructures were obtained by heterophase polymerization of aniline monomer using sodium dodecyl sulfate (SDS) as surfactant in presence of the short-chain alcohols: ethanol, propanol, butanol, pentanol, and hexanol as co-surfactants, and ammonium persulfate (APS) as oxidizing agent. The resulting polymers were analyzed by Field Emission, high resolution scanning electron microscopy (FE-HRSEM), UV/Vis, FTIR, cyclic voltammetry, and X-ray diffraction (XRD). It was observed from FE-HRSEM analysis that fiber-like particles were obtained when polymerizing without alcohol and in presence of ethanol, while very big agglomerates were obtained in presence of propanol and butanol; using pentanol as co-surfactant well-defined and spherical nanoparticles were obtained, the presence of hexanol through polymerization gives both spherical agglomerated and needle-like nanostructures. Final conversions were between 50 and 73 %, in the following order: hexanol = pentanol > butanol > thanol > propanol > without alcohol. Conductivities were in the range of 0.81 to 1.1 S/m with the higher value for that synthesized in presence of pentanol. Difference in conductivity of PANI was ascribed to formation of organic acids as a consequence of reaction between alcohols and APS, thus doping in situ PANI.

Idioma originalInglés
Páginas (desde-hasta)605-615
Número de páginas11
PublicaciónColloid and Polymer Science
Volumen293
N.º2
DOI
EstadoPublicada - feb. 2014

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