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The European Physical Journal E

, Volume 4, Issue 1, pp 77–83 | Cite as

Swelling kinetics of a compressed lamellar phase

  • J. Leng
  • F. Nallet
  • D. Roux

Abstract:

We investigate how multilamellar vesicles prepared in a compressed state under flow return to equilibrium. The kinetics is studied by following the temporal evolution of the viscoelasticity after the shear is stopped. It exhibits a two-step relaxation whose slower stage is strongly affected by temperature. According to a simple model, the temperature-dependent permeability of the lamellar phase is deduced from the measurements. We propose to attribute the permeability to handle-like defects, and its temperature dependence to an increase of the defect density when the lamellar-to-sponge phase transition is approached.

PACS. 05.70.Ln Nonequilibrium and irreversible thermodynamics - 61.30.Jf Defects in liquid crystals - 83.70.Hq Heterogeneous liquids: suspensions, dispersions, emulsions, pastes, slurries, foams, block copolymers, etc. 

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Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 2001

Authors and Affiliations

  • J. Leng
    • 1
  • F. Nallet
    • 1
  • D. Roux
    • 1
  1. 1.Centre de recherche Paul-Pascal, CNRS, Av. Schweitzer, F-33600 Pessac, FranceFR

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