On the application of a laser T-jump apparatus for perturbation of ionic micellar solutions

Grubic, M; Strey, R.; Teubner, Max

doi:10.1016/0021-9797(81)90204-6

Cited by 9 publications

(2 citation statements)

References 12 publications

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“…N q decreases with increasing temperature, whereby the data are best represented by a linear function. An analogous behavior has been observed for other ionic surfactants using other experimental techniques: T-jump, static and dynamic 11 light scattering, TRFQ, , and SANS …”

Section: Resultssupporting

confidence: 71%

Micellar Properties of Sodium Sulfopropyl Alkyl Maleates in Aqueous SolutionA Time-Resolved Fluorescence Quenching Study

1996

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The aggregation behavior of four sodium sulfopropyl alkyl maleates with alkyl chain carbon numbers 12, 14, 16, and 18 has been investigated in aqueous solution as a function of surfactant concentration, added sodium chloride concentration, and temperature by means of electrical conductivity and timeresolved fluorescence quenching (TRFQ). Critical micelle concentration and micelle ionization degree decrease upon increasing chain length, exhibiting the classical behavior for straight alkyl chain surfactants, whereas the Krafft temperature, T K, increases. The aggregation numbers have been found to decrease with increasing temperature between TK and 65 °C, with the magnitude of decrease becoming higher for longer hydrophobic chains. The surfactants show micellar growth with surfactant and salt concentration. Whereas the increase of the aggregation number N with ionic strength I is generally weak and follows in good approximation the power law relation N ∝ I β , with a unique exponent β = 0.13 below a surfactantdependent characteristic threshold ionic strength, I*, N steeply increases beyond I*. The values of N indicate that the micelles are probably spheroidal below I*. The micellar polydispersity is generally low for ionic strength I < I* and increases with I, in agreement with the theory of micellization.

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Section: Resultssupporting

confidence: 71%

Micellar Properties of Sodium Sulfopropyl Alkyl Maleates in Aqueous SolutionA Time-Resolved Fluorescence Quenching Study

1996

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“…Increasing temperature has a deep effect on micelle aggregation number. It was reported by Grubic et al (50) that the micelle aggregation number of ionic micelles decreases almost linearly with temperature. Increase in temperature led to an increase in solubility and hence a decrease in the hydrophobicity of the surfactant molecule.…”

Section: Effect Of Temperature On the Cmc And Micellar Structurementioning

confidence: 88%

Changes in self-assemblies induced by temperature concentration and light

González‐Pérez

2013

Front Biosci

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In this review, changes in aggregation induced by thermodynamic parameters, namely concentration and temperature are discussed. Most of these changes are concerned with sphere-to-rod transitions. On the other hand, the use of an external trigger such as light can induce large aggregation changes in photosurfactant systems. This is discussed in the second part of this review and several examples of light-induced aggregation changes are included, demonstrating the usefulness of this approach.

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On the Concentration Dependence of the Mean Aggregation Number of Ionic Micelles as Determined by Stopped‐Flow Experiments

Baumgardt

Klar

Strey

1982

Ber Bunsenges Phys Chem

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The analysis of the amplitudes in T‐jump experiments on aqueous micellar solutions yields the dependence of the critical micelle concentration and the mean aggregation number m of the micelles on temperature, whereas p‐jump experiments yield the corresponding dependence on pressure. In this paper we have, accordingly, evaluated the dependence of m on the total detergent concentration from stopped‐flow amplitudes (i.e. from concentration‐jump experiments). The experiments were performed on H2O‐NaDS and H2O‐NaDS. It turned out that the mean aggregation number of these detergents appears to increase with increasing detergent concentration, in accord with the results of other authors who have found an increase of m with increasing concentration of an added electrolyte.

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On the application of a laser T-jump apparatus for perturbation of ionic micellar solutions

Cited by 9 publications

References 12 publications

Micellar Properties of Sodium Sulfopropyl Alkyl Maleates in Aqueous SolutionA Time-Resolved Fluorescence Quenching Study

Micellar Properties of Sodium Sulfopropyl Alkyl Maleates in Aqueous SolutionA Time-Resolved Fluorescence Quenching Study

Changes in self-assemblies induced by temperature concentration and light

On the Concentration Dependence of the Mean Aggregation Number of Ionic Micelles as Determined by Stopped‐Flow Experiments

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