L 3 phases: Their structure and dynamic properties

Miller, Clarence A.; Gradzielski, Michael; Hoffmann, Hartmut; Krämer, U.; Thunig, C.

doi:10.1007/bfb0115974

Cited by 34 publications

(34 citation statements)

References 18 publications

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“…In our case the conductivity has the same value as that in the micellar phase. Another argument against the sponge phase is the stability range (19). Usually, L 3 phases are only stable in between a small concentration range.…”

Section: Resultsmentioning

confidence: 99%

Vesicle Phases with Semipolar Additives

Hoffmann

Horbaschek

Witte

2001

Journal of Colloid and Interface Science

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Section: Resultsmentioning

confidence: 99%

Vesicle Phases with Semipolar Additives

Hoffmann

Horbaschek

Witte

2001

Journal of Colloid and Interface Science

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“…12 Generally, the sponge phase is found in phase diagram regions close to a lamellar phase, and in some cases, both phases can be swollen almost to the same extent. 13 Two complementary models have been proposed to account for the structural properties of the L 3 phase. The random surface model 14 is able to predict some of the main characteristics of phase diagrams presenting lamellar and L 3 phases; it focuses mainly on the thermal fluctuations of the bilayers and describes the L 3 complexity by considering a highly randomized network of nonintersecting surfaces lying in a cubic lattice.…”

Section: Theoretical Sectionmentioning

confidence: 99%

Surface Self-Diffusion in L₃ Phases

Maldonado¹,

Urbach²,

Langévin³

1997

J. Phys. Chem. B

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The self-diffusion coefficient of amphiphilic probes in the L 3 phases of a surfactant system has been measured by fringe pattern photobleaching (FRAPP) experiments. The variation of the diffusion coefficients with the surfactant volume fraction is in agreement with a model for diffusion in cubic phases, which allows to determine approximately the topology of the phases. The observed variation of the diffusion coefficients with the probe lengths agrees with the free-area model for surfactant diffusion.

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“…One possibility to (*) Paper presented at the I International Conference on Scaling Concepts and Complex Fluids, Copanello, Italy, July [4][5][6][7][8]1994. One possibility to (*) Paper presented at the I International Conference on Scaling Concepts and Complex Fluids, Copanello, Italy, July [4][5][6][7][8]1994.…”

Section: -Introductionmentioning

confidence: 99%

Complex fluids with a yield value; their microstructures and rheological properties

et al. 1994

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ricevuto il 28 Ottobre 1994) Summary. --A general method is presented for the preparation of viscoelastic surfactant phases that consist of densely packed multilamellar vesicles in water. The phases form spontaneously when ionic surfactants are added to L=-or L3-phases from uncharged surfactants and cosurfactants. The dimensions and the structure of the vesicles were studied from FF-TEM micrographs for 100 mM surfactant solutions. The average diameter of the vesicles is in the range of 1 ~m, the interlamellar spacing is around 800/~. Under these conditions the vesicles are densely packed and cannot pass each other. The systems are highly viscoelastic and have a yield value. The storage and the loss moduli were determined by oscillating rheological measurements. The storage modulus was about one order of magnitude larger than the loss modulus and independent of frequency. Both parameters were determined as a function of the concentration and the chain length of the surfactant and cosurfactant, the charge density and ionic strength, the solubilization of hydrocarbon and temperature. The yield values and shear moduli increase linearly with the surfactant concentration. For constant surfactant concentration the moduli increase in a S-shaped form with the charge density and reach saturation for a mole fraction of about 7% of ionic surfactant. The storage moduli and yield values decrease with the addition of excess salt. The storage moduli depend strongly on the chain length of the surfactant. The values of the moduli are explained on the basis of a hard-sphere model in which the multilamellar vesicles are considered as hard-sphere particles. PACS 62.10 -Mechanical properties of liquids. PACS 01.30.Cc -Conference proceedings.

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L 3 phases: Their structure and dynamic properties

Cited by 34 publications

References 18 publications

Vesicle Phases with Semipolar Additives

Vesicle Phases with Semipolar Additives

Surface Self-Diffusion in L₃ Phases

Complex fluids with a yield value; their microstructures and rheological properties

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L 3 phases: Their structure and dynamic properties

Cited by 34 publications

References 18 publications

Vesicle Phases with Semipolar Additives

Vesicle Phases with Semipolar Additives

Surface Self-Diffusion in L3 Phases

Complex fluids with a yield value; their microstructures and rheological properties

Contact Info

Product

Resources

About

Surface Self-Diffusion in L₃ Phases