1. Aging and yielding in a sheared AOT/iso-octane/water lyotropic lamellar phase.
- Author
-
Auffret Y, Roux DC, El Kissi N, Caton F, Pignot-Paintrand I, Dunstan DE, and Rochas C
- Subjects
- Reproducibility of Results, Time Factors, Dioctyl Sulfosuccinic Acid chemistry, Octanes chemistry, Phase Transition, Water chemistry
- Abstract
We define a creep-flow-based measurement procedure to allow reliable and reproducible results on aging and yielding materials to be obtained. Investigation of the effects of different parameter such as the pre-shear time, the recovery time and the applied stress magnitude on the viscoelastic properties of a lyotropic liquid crystal phase is reported. Cryo-TEM observations indicate the formation of multiconnected bilayers at rest. Shearing the investigated material shows a propensity to acquire all the macroscopic properties of "soft jammed systems". These properties are then interpreted in terms of shear-induced structural rearrangement on the basis of cryofracture observation obtained at different times after the preshear imposed.
- Published
- 2009
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