Small angle neutron scattering was used to investigate the orientational ordering of a lyotropic mixture of cesium-perfluoro-octanoate (CsPFO) in water under simple Couette and oscillatory shear. The discotic-liquid-crytstal micelles were found to orient mostly parallel to the moving shear cell walls (i.e., vertically). A partial ‘‘flipping’’ of the orientation was observed in the smectic phase, whereby lamellae were seen to orient horizontally. Oscillatory shear produced orientational effects as well as shear-induced shifts of the phase transition boundaries. Interesting competing ‘‘bulk’’ and ‘‘wall’’ effects were also observed.
Physical Review E
Hammouda, Boualem; Mang, Joseph; Kumar, Satyendra (1995). Shear-induced Orientational Effects in Discotic-Liquid-Crystal Micelles. Physical Review E 51(6) 6282-6285. doi: 10.1103/PhysRevE.51.6282. Retrieved from https://oaks.kent.edu/article/shear-induced-orientational-effects-discotic-liquid-crystal-micelles