Temperature and Concentration Dependence of Properties of Sodium Dodecyl Sulfate Micelles Determined from Small Angle Neutron Scattering Experiments.

Link to publication record in Explore Bristol Research PDF-document This is the author accepted manuscript (AAM). The final published version (version of record) is available online via ACS at http://pubs.acs.org/doi/abs/10.1021/la301222m. Please refer to any applicable terms of use of the publisher. University of Bristol -Explore Bristol Research General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Full terms of use are available: http://www.bristol.ac.uk/pure/about/ebr-terms

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“…As with previous reports on related compounds [6,8,31], these additives appear to form ellipsoid-shaped aggregates.…”

supporting

confidence: 89%

Effects of Structure Variation on Solution Properties of Hydrotropes: Phenyl versus Cyclohexyl Chain Tips

et al. 2012

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“…The line width of the M I = 0 line of I (3,12) in 200 mM SDS as a function of (N)1 (3,12) withand without a d d e d C~( H~O )~~+ . Thelinewidth in the absence of broadener (circles) increases slightly as the nominal I (3,12) concentration is increased to (N)1 (3,12) A small increase in the line-shape function J, is also observed and quantitatively predicted by eq 48. We now consider the following question: how much error is involved in ignoring the effect of higher occupations of 1(3,12), i.e., what is the error in using eq 22 rather than eq 48?…”

Section: Appendix C Effect Of Nitroxide Concentrationmentioning

confidence: 63%

Statistical distributions and collision rates of additive molecules in compartmentalized liquids studied by EPR spectroscopy. 1. Sodium dodecyl sulfate micelles, 5-doxylstearic acid ester, and cobalt(II)

Bales¹,

Stenland²

1993

J. Phys. Chem.

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A technique to study the statistical distribution and collision rates of additive molecules in compartmentalized liquids is developed and applied to C O ( H~O )~~+ in SDS micelles. The physical model employs a dilute solution of a nitroxide free radical, the indicator, in the presence and absence of a varying concentration of paramagnetic molecules, the broadeners, which are C O ( H~O )~~+ in this case. The EPR spectra of the indicator vary nonlinearly with the concentration of the broadener in a manner consistent with a hypothesis that the resident time of a CO(H~O)~*+ ion on one micelle is long compared with lO-'s but inconsistent with a random distribution of the added divalent cations among the micelles. A simple theory is developed which takes into account interactions between broadeners residing in the same compartment and ignores such interactions if they reside in different compartments. Assuming a small electrostatic repulsion between the cations brings the experimental results into agreement with theory and allows the collision rate of the broadener with the indicator to be estimated. For C O ( H~O )~~+ ,this collision rate decreases linearly as a function of the inverse volume of the micelle as predicted by a simple random walk model. The polarity of SDS micelles, as estimated by the I4N hyperfine coupling constant of the indicator, decreases linearly with micelle size, while the microviscosity, as estimated from the rotational correlation time of the indicator, increases linearly with this size.

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“…6 One can see that an obvious increment for N m in the range of 8.53-19.70 mmol L -1 . This is probably due to a structural transition of the micelles as the concentration increases [48,54]. Similarly, the sharp increment of N m in the range of 70.94-84.98 mmol L -1 suggests a newer structural change for the micelles.…”

Section: Structural Characterization Of [C 2 Ohc 12 Im]clmentioning

confidence: 90%

Synthesis and Self‐Aggregation of a Hydroxyl‐Functionalized Imidazolium‐Based Ionic Liquid Surfactant in Aqueous Solution

Liu

Dong

Fang

2010

J Surfact & Detergents

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This paper deals with the synthesis and self-aggregation of a hydroxyl-functionalized imidazoliumbased ionic liquid (IL) surfactant, namely 1-hydroxyethyl-3-dodecylimidazolium chloride ([C 2 OHC 12 im]Cl). The molecular structure was confirmed by means of electrospray ionization mass spectrometry (ESI-MS), 1 H nuclear magnetic resonance ( 1 H NMR) and elemental analysis. Many important physicochemical parameters, such as the critical micelle concentration (CMC), the surface tension at CMC (c CMC ), the adsorption efficiency (pC 20 ), the surface pressure at CMC (P CMC ), the maximum surface excess (C m ), the minimum molecular cross-sectional area (A min ), the value of CMC/C 20 , the average number of aggregation (N m ) and the micellar microenvironment polarity were determined by surface tension-concentration curves, fluorescence spectra, and electrical conductivity. The phenomena of the second CMC, the concentration dependence of N m , and the critical average aggregation number (N m,c ) of imidazolium-based IL surfactants are reported for the first time in this paper.Keywords Hydroxyl-functionalized Á Imidazolium-based Á Ionic liquid surfactant Á The second CMC Á The critical aggregation number

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Temperature and Concentration Dependence of Properties of Sodium Dodecyl Sulfate Micelles Determined from Small Angle Neutron Scattering Experiments.

Cited by 121 publications

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Effects of Structure Variation on Solution Properties of Hydrotropes: Phenyl versus Cyclohexyl Chain Tips

Effects of Structure Variation on Solution Properties of Hydrotropes: Phenyl versus Cyclohexyl Chain Tips

Statistical distributions and collision rates of additive molecules in compartmentalized liquids studied by EPR spectroscopy. 1. Sodium dodecyl sulfate micelles, 5-doxylstearic acid ester, and cobalt(II)

Synthesis and Self‐Aggregation of a Hydroxyl‐Functionalized Imidazolium‐Based Ionic Liquid Surfactant in Aqueous Solution

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