界面活性剤水溶液の表面流動特性に関する実験的考察

概要

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A laser Doppler velocimeter was used to measure velocity distribution under gas-liquid interface of aqueous solutions of sodium dodecylbenzene sulfonate in a two-dimensional flow cell. The liquid, fed to form fresh surface from a submerged nozzle located at the center of the cell, was allowed to flow horizontally along the surface and then to flow down the outer sides of weirs. The measured velocity distributions provide information on the forces acting on the surface of flowing surfactant solutions. The results indicate the existence of the following two forces : (1) A force, prevailing on freshly formed surface, that retards surface velocity. (2) A force, prevailing near the weirs, that accelerates surface velocity. (1) is attributed to the dynamic surface tension effect, and (2) to the surface elasticity of adsorbed surfactant. These surface forces exert a marked influence on the surface hydrodynamics of surfactant solutions.
社団法人化学工学会の論文