Facile one-step route to polyaniline-silver nanocomposite particles and their application as a colored particulate emulsifier

摘要

Polyaniline-silver nanocomposites were synthesized in the form of colloidal particles by the facile one-step aqueous chemical oxidative dispersion polymerization of aniline using silver nitrate as an oxidant and polyvinyl alcohol) as a colloidal stabilizer. Aniline monomer was oxidized by silver ions, yielding polyaniline and elemental Ag simultaneously. The synthesized nanocomposite particles'were colloidallystable over 2 years and transmission electron microscopy studies indicated the production of spherical,plate and rod-shaped polyaniline-silver nanocomposite particles with a silver core-polyaniline shellmorphology. The conductivity of a pressed pellet of the nanocomposite particles using the conven-tional four-point probe technique was 1.4 × 10~-2 S/cm at 25℃. The nanocomposite particles behavedas a 'colored' particulate emulsifier for the stabilization of transparent oil-in-water emulsions.