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.
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Auffret, Y., Roux, D.C.D., El Kissi, N. et al. Aging and yielding in a sheared AOT/iso-octane/water lyotropic lamellar phase. Eur. Phys. J. E 29, 51–60 (2009). https://doi.org/10.1140/epje/i2009-10450-6
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DOI: https://doi.org/10.1140/epje/i2009-10450-6