X-ray Studies of Surfactant Ordering and Interfacial Phases at the Water-Oil Interface

Journal Article · Sun Jan 01 04:00:00 EST 2006 · J. Dispersion Sci. Technol.

DOI:https://doi.org/10.1080/01932690600660582· OSTI ID:914217

Pingali, S; Takiue, T; Luo, G; Tikhonov, A; Ikeda, N; Aratono, M; Schlossman, M

X-ray reflectivity studies of surfactants at the water-oil interface yield structural information with sub-nanometer resolution. In this presentation, we reviewed recent X-ray reflectivity measurements of the interface between water and a hexane solution of the hydrocarbon alkanol CH{sub 3}(CH{sub 2}){sub 19}OH and fluorocarbon alkanol CF{sub 3}(CF{sub 2}){sub 7}(CH{sub 2}){sub 2}OH. The mixed system exhibits three monolayer phases, two of which are similar to single surfactant phases. A transition from a liquid monolayer to a solid monolayer occurs with increasing temperature. This unusual phase transition and the qualitative features of the phase diagram are predicted by an appropriate superposition of the behavior of the two single surfactant systems.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 914217
• Report Number(s): BNL--78785-2007-JA
• Journal Information: J. Dispersion Sci. Technol., Journal Name: J. Dispersion Sci. Technol. Vol. 27; ISSN 0193-2691; ISSN JDTEDS
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
HEXANE
INTERFACES
OILS
PHASE STUDIES
PHASE TRANSFORMATIONS
SURFACTANTS
TEMPERATURE DEPENDENCE
WATER
national synchrotron light source