DGIST Scholar: Effects of Selective Polymerization Conditions on Physical Properties of Nanometer-Scale Silica/Polypyrrole Composites

Title: Effects of Selective Polymerization Conditions on Physical Properties of Nanometer-Scale Silica/Polypyrrole Composites

Citation: Jung, Yongju. (2015-12). Effects of Selective Polymerization Conditions on Physical Properties of Nanometer-Scale Silica/Polypyrrole Composites. Bulletin of the Korean Chemical Society, 36(12), 2881–2884. doi: 10.1002/bkcs.10589

Author Keywords: Electrical conductivity ; Polypyrrole ; Selective polymerization ; Silica

Keywords: Electric Conductivity ; Electrical Conductivity ; Ions ; Nano-Meter Scale ; Nanocomposites ; NANOPARTICLES ; Oxidizing Agents ; PARTICLES ; Polymerization ; Polypyrrole ; Polypyrrole (PPy) ; Polypyrroles ; Pyrrole Monomers ; Reactant Concentrations ; Selective Polymerization ; Selective Polymerizations ; Silica ; Silica Surface ; SPHERES ; SURFACE

Abstract: Nanometer-scale (approximately 70 nm) silica/polypyrrole composites were synthesized using a selective polymerization based on an in situ-generated strong oxidizing agent (NO+ ions) on the silica surface. The effects of the concentrations of reactants (pyrrole monomer and NO2- ions) and the presence of additional dopant anions (Cl- or SO2-4) on the polypyrrole (ppy) content and electric conductivity of the silica/ppy composites are examined. It was found that the ppy content in the silica/ppy composites increased with the reactant concentration in the range of 0.02-0.2 M. It is revealed that employing additional dopant anions could be a promising way to improve the electrical conductivity of the composites. © 2015 Korean Chemical Society, Seoul & Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
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