title: Ribbon phase in a phase-separated lyotropic lamellar-sponge mixture under shear flow.
abstract: 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.
authors.affiliation: Centre de Physique Moléculaire Optique et Hertzienne, Université Bordeaux I, 351 Cours de la Libération, 33400 Talence, France.
authors.forename: G
authors.initials: G
authors.lastname: Cristobal
authors.forename: J
authors.initials: J
authors.lastname: Rouch
authors.forename: P
authors.initials: P
authors.lastname: Panizza
authors.forename: T
authors.initials: T
authors.lastname: Narayanan
mesh_terms: 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
chemical_list: D008567:Membranes, Artificial; D012492:Salts; C017082:brine