What question did this study set out to answer?

Investigate the time-dependent rheological behavior and structural transitions of a lyotropic lamellar phase subjected to controlled shear flow near a layering instability.

February 12, 2001Physical Review LettersOpen Access

Oscillating Viscosity in a Lyotropic Lamellar Phase under Shear Flow

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Investigate the time-dependent rheological behavior and structural transitions of a lyotropic lamellar phase subjected to controlled shear flow near a layering instability.
Applied controlled shear stress to a lyotropic lamellar phase near a layering instability while monitoring time-dependent shear rate and viscosity.
Constructed a stress-versus-shear-rate state diagram characterizing stationary branches and temporal regimes.
Mapped two distinct stationary state branches corresponding to disordered and ordered multilamellar vesicle phases.
Detected sustained, periodic oscillations in shear rate and viscosity at constant applied shear stress prior to entering the fully ordered regime.
Linked the sustained viscosity oscillations to reversible, sample-wide structural transitions alternating between disordered and ordered vesicle states.

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Implication

Rheological investigation reveals sustained viscosity oscillations in a lyotropic lamellar phase under shear flow, suggesting periodic structural transitions between ordered and disordered states.

Cite This Study

Wunenburger et al. (2001) studied this question.

synapsesocial.com/papers/6a97a611618eaafe842d2ab6 https://doi.org/10.1103/physrevlett.86.1374

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Implication

Rheological investigation reveals sustained viscosity oscillations in a lyotropic lamellar phase under shear flow, suggesting periodic structural transitions between ordered and disordered states.

Oscillating Viscosity in a Lyotropic Lamellar Phase under Shear Flow

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Discussion

Implication

Cite This Study

Oscillating Viscosity in a Lyotropic Lamellar Phase under Shear Flow

Key Points

Discussion

Implication

Cite This Study

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