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Mixed surfactants for positive synergism in dense CO2
This proposal aims to explore a cheaper and more environmental-benign surfactant system for yielding efficient water/CO2 microemulsions. The new surfactants permit high... -
Concentrated emulsions as proxy CO2 thickeners
The proposal aims to explore the oil-in-water (brine) high internal phase emulsion systems (HIPEs) formed by nonylphenol ethoxylate surfactants using contrast variation SANS... -
Nonfluorous Cosurfactant/Hyperbranched Surfactant Mixtures for W/CO2 Microemu...
This proposal aims to explore cheap and environmental-benign cosurfactants (or cosolvents) for yielding CO2-philic hydrocarbon surfactant/water/CO2 microemulsions (W/CO2... -
Micellar modifiers for CO2
This proposal focuses on a new approach to the formation of rod-like micelles in supercritical CO2 (scCO2). Recent successful high-pressure SANS (HP-SANS) results have shown for... -
Opening up microemulsion phases in CO2
New types of water-in-CO2 microemulsions using mixed surfactant systems will be investigated by high-pressure SANS (HP-SANS). Exciting new results (see report on RB820030) have... -
Tuning micellar interfacial curvature in CO2 by small molecule additives
This proposal aims to explore co-surfactants, as additives with CO2-active surfactants, for elongating reversed micelles in dense CO2 by using high-pressure small-angle neutron... -
Organogels for applications in CO2
This proposal aims to explore organogel systems, like those recently decsribed1-3, but made from new CO2 philic surfactant-gelators. These have been synthesised to feature... -
Manipulation of the aggregate curvature in water/dense CO2 system
This proposal aims to investigate how the curvature of surfactant assemblies in water/dense CO2 systems can be tuned via the design and mixing of CO2-phillic surfactants. One... -
A new approach to viscosity enhancement of oils and CO2
Due to the naturally low viscosity of liquid CO2 (0.1-1.0 cP pressure/temperature dependent) the CO2 is prone to ¿fingering¿, limiting the efficiency of CO2-EOR [1]. In order to... -
Rod-like micelles as CO2 fluid thickeners
Using LOQ, we have recently shown that self-assembly of fluoro-sulfocuccinate surfactants is indeed a viable approach to promote viscosity enhancement in liquid CO21 (Rod-like... -
Optimizing surfactants for CO2
This experiment addresses an important, and still unresolved, question in the field CO2-philic surfactants: what is the minimum fluorine content necessary to obtain a CO2-philic...