A. Riede et al., In situ polymerized polyaniline films. 2. Dispersion polymerization of aniline in the presence of colloidal silica, LANGMUIR, 16(15), 2000, pp. 6240-6244
Composite polyaniline-silica films produced on glass surfaces during the di
spersion polymerization of aniline in the presence of colloidal silica were
investigated. The film morphology and composition were characterized by FT
IR, W-vis, and X-ray photoelectron spectroscopies. Compared with pure polya
niline films produced under similar conditions, the composite films are thi
nner and smoother, and their surface is silica rich. The film thickness of
both pure and composite films decreased as the polymerization temperature i
ncreased from 0 to 50 degrees C. To determine the particle size of polyanil
ine-silica dispersion particles, which are formed at the same time as the f
ilms, dynamic light scattering was used. The correlation between the partic
le size and film thickness is discussed. The electrical conductivity of com
posite polyaniline films was only a little affected by the presence of sili
ca.