In situ polymerized polyaniline films. 2. Dispersion polymerization of aniline in the presence of colloidal silica

Citation
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
Citations number
36
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
LANGMUIR
ISSN journal
07437463 → ACNP
Volume
16
Issue
15
Year of publication
2000
Pages
6240 - 6244
Database
ISI
SICI code
0743-7463(20000725)16:15<6240:ISPPF2>2.0.ZU;2-X
Abstract
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.