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Viscoelasticity of vesicle dispersions

Author

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  • Seki, Kazuhiko
  • Komura, Shigeyuki

Abstract

Linear viscoelastic properties of dispersions of vesicles and microemulsions are investigated in detail. Each droplet is considered to be coated by a film of amphiphilic molecules (fluid membrane) whose shape is mainly governed by the bending rigidity rather than the surface tension. In addition to this elastic property, we also take into account the membrane compressibility which plays an important role in the macroscopic viscoelastic behavior of the system. For dilute emulsions, we calculated the effective complex viscosity by generalizing Taylor's old calculation. The mechanical force balance condition at the membrane can be expressed by using the generalized Laplace's formula derived for compressible fluid membranes. On the basis of the cell model, we also calculated the effective complex viscosity for nondilute emulsions. Comparing various characteristic time scales both for vesicles and microemulsions, we discuss the detectable relaxation modes in the viscoelastic experiments.

Suggested Citation

  • Seki, Kazuhiko & Komura, Shigeyuki, 1995. "Viscoelasticity of vesicle dispersions," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 219(3), pages 253-289.
    • Handle: RePEc:eee:phsmap:v:219:y:1995:i:3:p:253-289
    DOI: 10.1016/0378-4371(95)00171-3
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    References listed on IDEAS

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    1. Van Der Linden, E. & Bedeaux, D. & Borkovec, M., 1989. "Dynamics of microemulsion droplets," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 162(1), pages 99-110.
    2. Lisy, V. & Zatovsky, A.V. & Zvelindovsky, A.V., 1992. "Hydrodynamic fluctuations of spherical micelles and vesicles," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 183(3), pages 262-278.
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    Cited by:

    1. Frenkel, Gad, 2015. "Droplet shape fluctuations in agitated emulsions—Beyond the dilute limit," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 427(C), pages 251-261.

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