Mixed Micellar Properties of Nonionic Saccharide and Anionic Fluorocarbon Surfactants in Aqueous Solution
| Autor: | Kunio Esumi, Kenji Takasugi, Takahiro Arai |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Aqueous solution
Aggregation number Inorganic chemistry chemistry.chemical_element Mole fraction Micelle Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials Surface tension Colloid and Surface Chemistry chemistry Pulmonary surfactant Polymer chemistry Lithium Fluorocarbon |
| Zdroj: | Journal of Colloid and Interface Science. 197:94-100 |
| ISSN: | 0021-9797 |
| DOI: | 10.1006/jcis.1997.5232 |
| Popis: | Mixed micellar properties of nonionic saccharides (n-decyllactobionamide, C10Glu2; n-dodecyllactobionamide, C12Glu2) and anionic fluorocarbon surfactants (lithium perfluorooctanesulfonate, LiFOS) in aqueous solutions have been studied by means of surface tensiometry, NMR, and light scattering. The interaction parameters estimated from the modified regular solution theory are -5.0 for the C10Glu2/LiFOS system and -0.2 for the C12Glu2/LiFOS system. This difference could be due to the interaction of the surfactant tails. The average aggregation number is almost identical over a wide mole fraction of C12Glu2 for the C12Glu2/LiFOS system, while it shows a minimum at a C10Glu2 mole fraction of 0.4 for the C10Glu2/LiFOS system. It is also found from NMR measurements that the segmental motions of surfactants in the mixed micelles of C12Glu2 and LiFOS are not restricted, whereas they are restricted at a C10Glu2 mole fraction of 0.4 for the C10Glu2/LiFOS system. These motional changes as well as micellar composition reflect the solubilization of decafluorobiphenyl in the mixed micelles. Copyright 1998 Academic Press. Copyright 1998Academic Press |
| Databáze: | OpenAIRE |
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