J. Phys. II France
Volume 3, Numéro 9, September 1993
Page(s) 1427 - 1452
DOI: 10.1051/jp2:1993211
J. Phys. II France 3 (1993) 1427-1452

Effect of shear on a lyotropic lamellar phase

Olivier Diat, Didier Roux and Frédéric Nallet

Centre de recherche Paul-Pascal, CNRS, avenue du Docteur Schweitzer, 33600 Pessac, France

(Received 17 March 1993, accepted 18 May 1993)

We present a series of experiments, using different techniques such as light scattering, conoscopy, neutron scattering and microscopic observations, to determine the orientation of lyotropic lamellar phases under shear. Three states of orientation are observed, depending upon both the shear rate and the inter-membrane separation. These steady states are separated by dynamic transitions. Among the states described, we focus our attention on a state made of monodisperse close-packed multilayered vesicles whose size is precisely fixed by the shear rate.

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