Synthesis and electrorheological properties of polyaniline/silicon dioxide composites

This study was to synthesize the inherently conductive polymer polyaniline using an optimized process to prepare polyaniline/silicon dioxide (PANI/SiO 2 ) composites by in situ polymerization and ex situ solution mixing. PANI and PANI/SiO 2 composite films were prepared by drop-by-drop and spin-coat...

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Bibliographic Details
Published in:Journal of materials science 2012-07, Vol.47 (13), p.5276-5286
Main Authors: Yilmaz, Hasim, Zengin, Hüseyin, Unal, Halil Ibrahim
Format: Article
Language:English
Subjects:
Analysis
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Coatings
Crystallography and Scattering Methods
Dispersions
Electric field strength
Electric fields
Electron microscopes
Materials Science
Morphology
Particle spin
Particulate composites
Polyanilines
Polymer matrix composites
Polymer Sciences
Polymerization
Scanning electron microscopy
Sedimentation
Shear rate
Silicon dioxide
Smart materials
Solid Mechanics
Spin coating
Volume fraction
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Summary:This study was to synthesize the inherently conductive polymer polyaniline using an optimized process to prepare polyaniline/silicon dioxide (PANI/SiO 2 ) composites by in situ polymerization and ex situ solution mixing. PANI and PANI/SiO 2 composite films were prepared by drop-by-drop and spin-coating methods. The morphology of particles and films were examined by a scanning electron microscope (SEM). SEM measurements indicated that the SiO 2 were well-dispersed and isolated in composite films. The electrorheological (ER), characteristics of the PANI/SiO 2 composites were investigated. A volume fraction series (φ = 5–25 %) of the PANI/SiO 2 /silicone oil dispersions were prepared and sedimentation stabilities were determined. An ER activity was observed from the samples, when subjected to external electric field strength thus, they were classified as smart materials. Some parameters affecting the ER properties of the dispersions such as volume fraction, shear rate, electric field strength, frequency, and temperature were investigated.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-012-6413-3