Novel colloidal polyaniline–silica composites

Abstract

We have prepared novel colloidal polyaniline-silica composites by chemically polymerising aniline in the presence of small silica particles of 38 k 7 n m diameter; these composites have been characterised by various techniques including thermogravimetry, microanalyses, scanning electron microscopy, photon correlation spectroscopy, visible absorption and FTlR spectroscopy and conductivity measurements.

Synthesis of Nano/Microstructures at Fluid Interfaces

“…[104] Armes and co-workers first reported the preparation of silica/polyaniline composites by using commercial ultrafine silica sols as the stabilizer in 1992. [105] The silica nanosols can also be used as a stabilizer for the in situ polymerization of various monomers to prepare raspberry-like hybrid microspheres. [106][107][108][109][110][111][112][113][114] Similar polymerizations of aniline with the different nanoparticles stabilizers, such as ZnO, [115] SiO 2 , [116] and CeO 2 , [117] can be used to prepare conducting polyaniline raspberry-like composites.…”

Synthesis and Characterization of Polypyrrole– Magnetite–Silica Particles

“…4a-4e. These nanocomposite particles are nominally spherical but have a rather ill-defined particle morphology, at least compared to the pronounced ''raspberry'' morphology noted previously for polypyrrole-silica and polyaniline-silica nanocomposites (12)(13)(14). Nevertheless, ''dark spots'' can be clearly observed within the interior of the polypyrrole-magnetite-silica particles; these features are attributed to the magnetite component since this component has a higher electron density than either silica or polypyrrole.…”

“…silica and polypyrrole-silica nanocomposites using ultrafine silica sols (12)(13)(14). Both XPS studies (15) and aqueous prior to their addition to 0.7 M NH 4 OH (2000 cm 3 ).…”

Encapsulation of Inorganic Particles by Dispersion Polymerization in Polar Media

“…(46). This method allows the preparation of monodisployed for the preparation of composite materials made of perse silica spheres, with radii ranging from 10 nm to a few ultrafine silica particles and polyaniline (39)(40)(41)(42)(43) or polypyr-mm in a mixture of ethanol, ammonia, and water using the role (41, 42, 44, 45), two conductive polymers. However, so-called ''sol-gel'' process at low temperature.…”