Ribbon phase in a phase-separated lyotropic lamellar-sponge mixture under shear flow.
We report the effect of shear flow on a phase-separated system composed of lyotropic lamellar (L(alpha)) and sponge (L3) phases in a mixture of brine, surfactant, and cosurfactant. Optical microscopy, small-angle light, and x-ray scattering measurements are consistent with the existence of a steady state made of multilamellar ribbon-like structures aligned in the flow direction. At high shear rates, these ribbon-like structures become unstable and break up into monodisperse droplets resulting in a shear-thickening transition.
Cristobal
G
G
Centre de Physique Moléculaire Optique et Hertzienne, Université Bordeaux I, 351 Cours de la Libération, 33400 Talence, France.
Rouch
J
J
Panizza
P
P
Narayanan
T
T
D055592:Biophysical Phenomena; D001703:Biophysics; D008027:Light; D008567:Membranes, Artificial; D008853:Microscopy; D012492:Salts; D012542:Scattering, Radiation; D013314:Stress, Mechanical; D013696:Temperature; D014965:X-Rays
D008567:Membranes, Artificial; D012492:Salts; C017082:brine