Interfacial Studies on a Charged Surface in Oil by Contact Angle Measurements

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• Seung Lee, University of Cambridge, BP Institute
• Thursday 02 December 2010, 11:30-12:00
• Open Plan Area, BP Institute, Madingley Rise CB3 0EZ.

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Contact angles are dependent upon three interfacial energies: γsolid/liquid, γsolid/vapour, and γliquid/vapour according to Young’s relation. Solid, liquid and vapour phases in this work are respectively amorphous silicates, water droplets and oil media. Due to the three variables, contact angles could be insufficient but necessary to study the surface modification and water adsorption on the surfaces in situ. Surfactants, Ca(AOT)2 added in the oil phase can modify the surface via a cation bridging and hence the surface tension, γsolid/liquid. Added electrolytes in water droplets can vary the water adsorption on the modified surfaces.

This talk is part of the Interfacial Studies on a Charged Surface in Oil by Contact Angle Measurements series.

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