界面活性剤水溶液のせん断粘度測定における流れの観察(非ニュートン(2),一般講演)

概要

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The shear flow of surfactant solutions in a cone-plate rheometer was examined experimentally. The test fluids used in this study were the surfactant solutions of CTAB and NaSal system. In the curves of steady shear viscosity, the shear-thinning showing a non-Newtonian property of surfactant solutions was confirmed. However, the change in viscosity property that suggested a structural change of micelle appeared with an increment of shear rate. In the flow visualization between a cone and a plate, the white turbidity representing change in micelle structure was observed at a shear rate above 10s^<-1>. With regard to the measurement of pressure distribution on the plate of the rheometer, it was found that the transitional response of pressure at a higher shear rate than 10s^<-1> supported the existence of elastic effect for surfactant solutions. Furthermore, since the elasticity increases with increasing shear rate, it is suggested that the structural change of micelle induced by shear flow was closely related to the elastic effect.
日本流体力学会の論文
2008-09-04