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Phase Equilibria and Structure of the 1-dodecyl Pyridinium Bromide-Dodecane-Water System
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
1998 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 204, no 2, 312-319 p.Article in journal (Refereed) Published
Abstract [en]

The isothermal ternary phase diagram for the 1-dodecylpyridinium bromide/dodecane/water system was determined at 40°C by 2H NMR and polarizing microscopy methods. Two liquid crystalline phases, a large cubic area and a normal hexagonal phase, and one isotropic normal micellar solution phase were characterized, and their ranges of existence were determined. The micelles were found to be probably small and spherical at lower concentrations of surfactant, and were found to grow at higher concentrations and on addition of oil. The two-phase areas, L1 + H1 and H1 + I, are both very narrow. The comparatively large cubic area, containing 43-63 wt% surfactant and 3-10 wt% dodecane, is probably consistent of more than one structure. SAXS experiments indicate two different structures built of discrete micellar aggregates.

Place, publisher, year, edition, pages
1998. Vol. 204, no 2, 312-319 p.
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:miun:diva-8449OAI: oai:DiVA.org:miun-8449DiVA: diva2:139773
Available from: 2009-01-26 Created: 2009-01-26 Last updated: 2017-12-14Bibliographically approved

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Edlund, HåkanBydén, MalinLindström, Birger

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