Stability of dispersions

  • Eli Ruckenstein
  • Marian Manciu


The critical concentration, C, is defined as the concentration at which there is a change in the size distribution of the surfactant aggregates from a monotonically decreasing curve (below C), to one that possesses a maximum and a minimum above the critical concentration. The transition in shape occurs at a size distribution that displays an horizontal inflexion point. The critical micelle concentration (CMC) has a value close to the critical value C [3.1] and [3.2].


Interfacial Tension Interfacial Layer Surfactant Molecule Persistence Length Lamellar Phase 
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  1. 3.1
    E. Ruckenstein, R. Nagarajan: “Critical micelle concentration. A transition point for micellar size distribution,” JOURNAL OF PHYSICAL CHEMISTRY 79 (1975) 2622-2626.CrossRefGoogle Scholar
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  3. 3.3
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  4. 3.4
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  5. 3.5
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  6. 3.6
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  7. 3.7
    R. Nagarajan, E. Ruckenstein: “Molecular theory of microemulsions,” LANGMUIR 16: 16 (2000) 6400-6415.CrossRefGoogle Scholar
  8. 3.8
    E. Ruckenstein: “Phase transitions in insoluble monolayers of surfactants,” Encyclopedia of Surface and Colloid Science (2007) Taylor & Francis.Google Scholar
  9. 3.9
    E. Ruckenstein, M. Manciu: “On the Stability of Lyotropic Lamellar Liquid Crystals and the Thicknesses of Their Lamellae,” LANGMUIR 17 (2001) 5464-5475.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.Department of Chemical and Biological EngineeringUniversity at Buffalo The State University of New YorkBuffaloUSA
  2. 2.Department of PhysicsUniversity of Texas at EI PasoEI PasoUSA

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