Hydrodynamical behaviour of the poly(ethylene oxide)-sodium dodecylsulphate complex

François, Jeanne; Dayantis, Jean; Sabbadin, J.

doi:10.1016/0014-3057(85)90049-7

Cited by 166 publications

(154 citation statements)

References 25 publications

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“…an expansion of the polymer coils, on association with the charged surfactant, as reported also by Nagaran and Kalpakci of PEO/SDS systems (Nagaran et al, 1982), and by (Tadros, 1974) for PVAc/DDBS systems, respectively. A systematic investigation of the variation of the viscosity of PEO solutions, covering a range of molecular weight and concentration, as a function of added SDS concentration, has been described by (Francois et al, 1985). Their plots of reduced viscosity show a sudden increase at a concentration (T 1 ) of SDS, which was independent of the polymer concentration, and a levelling off at a concentration (T 2 ), which increased with polymer concentration ( Figure 6).…”

Section: Solution Viscosity and Rheologymentioning

confidence: 99%

Interactions between cationic starch and anionic surfactants

Merta¹,

Stenius²

1995

Colloid Polym Sci

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Section: Solution Viscosity and Rheologymentioning

confidence: 99%

Interactions between cationic starch and anionic surfactants

Merta¹,

Stenius²

1995

Colloid Polym Sci

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“…Electrostatic forces dominate this interaction, although hydrophobic forces may play a secondary role. [5][6][7] The latter case (b) is probably best exemplified by the system involving poly(ethylene oxide) (PEO) and sodium dodecyl sulfate (SDS) above the CMC; here, the debate about the nature of the attractive force has included the reduction of interfacial energy between the hydrocarbon core and the local solvent medium, [8][9][10] the association between the ethylene group of PEO and the aliphatic part of micelles, 11 and the role of the cationic counterion in the stabilization of the complex. 12 These arguments indicate the difficulty in reaching definitive conclusions on this system.…”

Section: Introductionmentioning

confidence: 99%

Binding of Cationic Mixed Micelles to Pyrene-Labeled Poly((acrylamido)-2-methylpropanesulfonate)

et al. 1997

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The interaction between pyrene-labeled poly(acrylamido)-2-methylpropane sulfonate) (PyPAMPS) and mixed micelles of n-dodecylhexaoxyethylene glycol monoether/n-hexadecyltrimethylammonium chloride (C12E6/CTAC) was studied by turbidimetry, quasielastic light scattering (QELS), fluorescence quenching, and UV spectroscopy. The present report focuses on the effect of the pyrene label on the polymer-micelle interaction. With nonlabeled PAMPS, we observe by turbidity and QELS a critical mole fraction of ionic surfactant (Yc) corresponding to the onset of polyelectrolyte-micelle interaction. The same Yc is observed by turbidity and QELS for PyPAMPS. However, PyPAMPS shows a lower additional transition by the same methods, which we refer to as "Yc1" to distinguish it from "Yc2" which is seen for both PAMPS and PyPAMPS. Steady-state fluorescence, in the presence of a hydrophobic quencher (N,N-dimethylaniline) solubilized in the micelles, also shows a discontinuity at Yc1. Therefore, we conclude that Yc1 and Yc2 correspond to the binding of micelles to polymeric pyrene sites and AMPS sites, respectively. Analysis of UV spectra at varying Y demonstrates that the polymer-bound pyrene penetrates inside micelles and resides at or near the hydrophobic core. These results indicate preferential binding of micelles to pyrene binding sites; nevertheless, both Yc1 and Yc2 show a linear dependence on the square root of the ionic strength. This dependence suggests the dominant role of electrostatic forces, consistent with the observation that nonionic micelles will not bind to PyPAMPS. We conclude that conjoint hydrophobic and electrostatic effects determine the interaction between PyPAMPS and C12E6/ CTAC mixed micelles.

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“…[11][12][13][14][15][16][17][18][19] We summarize below, briefly, what is known via a variety of techniques 11,12,[14][15][16][17][18][19][20][21][22] including NMR relaxometry 11,23,24 and diffusometry. 10,12,18,19,25 1.…”

Section: Introductionmentioning

confidence: 99%

An NMR study of macromolecular aggregation in a model polymer-surfactant solution

Barhoum

Yethiraj

2010

The Journal of Chemical Physics

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A model complex-forming nonionic polymer-anionic surfactant system in aqueous solution has been studied at different surfactant concentrations. Using pulsed-field-gradient diffusion NMR spectroscopy, we obtain the self-diffusion coefficients of poly͑ethylene glycol͒ ͑PEO͒ and sodium dodecyl sulfate ͑SDS͒ simultaneously and as a function of SDS concentration. In addition, we obtain NMR relaxation rates and chemical shifts as a function of SDS concentration. Within the context of a simple model, our experimental results yield the onset of aggregation of SDS on PEO chains ͑CAC= 3.5 mM͒, a crossover concentration ͑C 2 =60 mM͒ which signals a sharp change in relaxation behavior, as well as an increase in free surfactant concentration and a critical concentration ͑C m = 145 mM͒ which signals a distinct change in diffusion behavior and a crossover to a solution containing free micelles. C m also marks the concentration above which obstruction effects are definitely important. In addition, we obtain the concentration of SDS in monomeric form and in the form of free micelles, as well as the average number of SDS molecules in a PEO-SDS aggregate ͑N Aggr ͒. Taken together, our results suggests continuous changes in the aggregation phenomenon over much of the concentration but with three distinct concentrations that signal changes in the nature of the aggregates.

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Hydrodynamical behaviour of the poly(ethylene oxide)-sodium dodecylsulphate complex

Cited by 166 publications

References 25 publications

Interactions between cationic starch and anionic surfactants

Interactions between cationic starch and anionic surfactants

Binding of Cationic Mixed Micelles to Pyrene-Labeled Poly((acrylamido)-2-methylpropanesulfonate)

An NMR study of macromolecular aggregation in a model polymer-surfactant solution

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