Synthesis and Characterization of Micrometer-Sized, Polyaniline-Coated Polystyrene Latexes
| Autor: | Shen Y. Luk, C. Barthet, Steven P. Armes, Heather M. E. Stanley, Stuart F. Lascelles |
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| Rok vydání: | 1998 |
| Předmět: |
Materials science
Scanning electron microscope Surfaces and Interfaces Condensed Matter Physics Polypyrrole Overlayer Micrometre chemistry.chemical_compound symbols.namesake Colloid chemistry Chemical engineering Polymer chemistry Polyaniline Electrochemistry symbols General Materials Science Polystyrene Raman spectroscopy Spectroscopy |
| Zdroj: | Langmuir. 14:2032-2041 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/la971064z |
| Popis: | Poly(N-vinylpyrrolidone)-stabilized polystyrene (PS) latexes have been coated with thin overlayers of polyaniline (PANi) to produce electrically conductive “core−shell” particles. In this work we focused on the morphology of the PANi overlayer, the colloid stability of the coated latexes, and electrical conductivity. PANi-coated particles exhibit a nonuniform morphology as observed by scanning electron microscopy (SEM), in comparison with the relatively smooth polypyrrole overlayers synthesized in a previous study (Lascelles, S. F. et al., J. Mater. Chem. 1997, 7, 1339 and 1349). Disk centrifuge photosedimentometry confirmed that the PANi-coated PS latexes were weakly flocculated. The underlying PS latex “core” was quantitatively removed by solvent extraction, and SEM observations of the PANi residues revealed a “broken egg shell” morphology. Vibrational bands due to the PANi component were more intense in both the FT-IR and Raman spectra of the PANi-coated PS latexes, which is also consistent with the “c... |
| Databáze: | OpenAIRE |
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