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| Interfacial
Phenomena - Liquid-Liquid Systems |
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One important area to understand
the physics and behavior
of any multi-phase fluid
system is the interactions
among the various phases.
For two (or more) liquid
phases, the interfacial
energy, or interfacial tension
(IFT), is a critical parameter
that determines in part
the nature of the mixing
between phases, such as
a loose dispersion or a
"tight" emulsion where the
fluids are intimately together
as microscopic droplets.
The figure below illustrates
the results of an atomistic-level
simulation of water-surfactant-oil
interface. The location
of each molecule, as dictated
by fundamental physics,
and the details of the forces
at the interface, allows
the calculation of the IFT.
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Hydrocarbon
Phase
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Interface
Region
(Surfactant-Rich)
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Aqueous
Phase
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| Parallel experimental
studies confirm the key trends
in surfactant chemical structure
that are responsible for low
IFT that are predicted by
these first principle calculations.
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| RELATED PUBLICATIONS
AND PRESENTATIONS: |
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1. "Molecular
Dynamics Study of Surfactant-Mediated
Decane/Water Interface: Effect
of Molecular Architecture
of Alkyl Benzene Sulfonate"
Jang, S. S.; Lin, S. T.; Maiti
,P. K.; Blanco, M; Goddard,
W. A.; Shuler, P. J.; Tang,
Y. J. Phys. Chem, B (2004),
108, 12130-12140 |
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2. "Alkyl
Polyglycoside Surfactants
for Improved Oil Recovery"
Iglauer,S.; Wu, Y.; Shuler,
P. J.; Tang, Y.; Blanco, M;
Goddard, W. A. SPE 89472 (Proceedings),
SPE/DOE 14th Symposium on
Improved Oil Recovery, Tulsa,
Oklahoma. April 17-21, 2004
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3. "Synergistic
Effect of Alkyl Polyglycoside
and Sorbitan Mixtures on Lowering
Interfacial Tension and Enhancing
Oil Recovery"
Wu, Y.; Iglauer,S.; Shuler,
P. J.; Tang, Y.; Blanco, M;
Goddard, W. A. 227th ACS National
Meeting, Anaheim, CA; March
28 - April1 1, 2004 |
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4. "The Influence
of Alcohol Co-surfactants
on the Interfacial Tensions
of Alkylpolyglucoside Surfactant
Formulations vs. n-Octane"
Iglauer,S.; Wu, Y.; Shuler,
P. J.; Tang, Y.; Blanco, M;
Goddard, W. A. 227th ACS National
Meeting, Anaheim, CA;. March
28 - April1 1, 2004 |
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5. "Adsorption
of Novel Surfactants for Enhanced
Oil Recovery onto Kaolinite
Clay"
Wu, Y.; Shuler, P. J.; Tang,
Y.; Goddard, W. A. 226th ACS
National Meeting, New York,
NY; September 7-11, 2003 |
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