1404 コーン・プレートレオメータを用いた界面活性剤水溶液のせん断粘度測定における界面観察(S30-1 複雑流体の流動現象(1),S30 複雑流体の流動現象)

概要

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We measured the steady shear viscosity for surfactant solutions with a rheometer of cone-plate type and observed a liquid surface at the circumference of cone to examine the variation of shear-thinning property with increasing a shear rate. Test fluids used in this experiment were the mixture of CTAB and NaSal in distilled water. In the measurement of shear viscosity, the shear-thinning property was confirmed at a lower shear rate than 5.0s^<-1> for all fluids. However, beyond a shear rate of 5.0s^<-1>, the decrement of shear viscosity due to shear-thinning property became gentle. Such property of shear viscosity was closely connected to the transition of micellar network structure for surfactant solutions. Furthermore, it is found that the liquid surface at the circumference of cone for the higher shear rate becomes unstable and the flow instability is appeared in the gap of cone and plate.
一般社団法人日本機械学会の論文
2007-09-07