Surface and interfacial tensions of systems involving lyotropic liquid crystals
It was attempted to determine the surface and interfacial tensions of lyotropic liquid crystals involved in the phase diagram of ternary system: sodium dodecyl sulfate + water + n-hexanol. For this purpose du Noüy’s platinum ring method was applied and comparatively reliable data have been obtained. Parallel with this measurement, the surface tension of microemulsions which also exist in the same diagram was determined. It was so far found that the surface tension of either liquid crystals or microemulsions is almost independent on their chemical composition (water content) or their bulk properties such as viscosity. These results were discussed on the basis of the intermolecular potential theory qualitatively. Some supplementary experimental data of surface and interfacial tensions concerning the main object are also included in the paper.
KeywordsSurface Tension Sodium Dodecyl Sulfate Liquid Crystal Interfacial Tension Sodium Dodecyl Sulfate Concentration
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