ひも状ミセル水溶液における大振幅正弦的せん断流動中のシアバンド形成に対する巨視的・微視的同時観察

抄録

The shear-banding and the shear-induced structure (SIS) of CTAB/NaSal wormlike micellar solution in large amplitude oscillatory shear in concentric cylinder flow cell were investigated by the simultaneous macroscopic and microscopic observation. The crossed-Nicols polarizer method was used to detect the distributions of birefringence and orientation angle along the radial direction. The shear-banding was visualized by the distribution of birefringence and generation of SIS was estimated by the change of the stress-optical coefficient. The critical conditions of the shear-banding and SIS in the large amplitude oscillatory shear were plotted on the shear strain - shear rate chart. The SIS condition coincided those the step shear reported previously.