Calcium effect on the solubility of sodium dodecyl sulfate in sodium chloride solutions

Baviere, M.; Bazin, Brigitte; Aude, Robert

doi:10.1016/0021-9797(83)90179-0

Cited by 56 publications

(35 citation statements)

References 5 publications

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“…The break point positions relate to Ca(DS) 2 precipitation and to micellation at higher content of NaDS, and are in accordance with known data [34][35][36][37]. Thus, results presented in Figure 2 are consistent with the reports on reliability of the DS-ISE as a sensor of the DS À ion activity [9][10][11]23].…”

Section: à3supporting

confidence: 94%

“…More of this, processing of the response data of Na glass electrode and DS-ISE in the whole micellation domain gave a constant ratio between the DS À and the Na + contents in micelles: (dC Na / dC DS ) mic = 0.8 with correlation coefficient r = 0.99998, upper index mic refers to species in micelle. This ratio is nothing else as the so-called binding degree b which value for NaDS micelles was reported being within the range 0.75-0.85 [35][36][37]. Thus, the content of Na + bound by micelles, per 1 DS À anion in a micelle is constant (b = 0.8) within the whole micellation domain studied in this work, whatever is z the aggregation degree.…”

Section: Response Of Electrodes 2 and 8 In The Presence Of Ds Micellesmentioning

confidence: 79%

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Calcium‐Selective Electrodes for Measurements in the Presence of Anionic Surfactants

et al. 2011

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Calcium selective electrodes with various membrane formulations were studied in solutions containing CaCl 2 and sodium dodecylsulfate (NaDS). It is shown that electrodes based on neutral ionophores ETH 1001 and ETH 129 cannot be used as Ca 2 + ion sensors in these solutions because of strong anion interference from DS À anion. Among other formulations, that based on calcium bis(tetramethylbutylphenyl)phosphate in tri(2-ethylhexyl)phosphate appear the most promising. The interpretation of the ISE response in solutions under study relied on a novel approach which considers three forms of calcium: Ca 2 + free ions, Ca in Ca(DS) 2 precipitate, and Ca 2 + bound by the DS À micelles. Data needed for the respective calculations were obtained by DS À selective electrode based on tetradecylammonium, and Na + selective glass electrode.

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Section: à3supporting

confidence: 94%

Section: Response Of Electrodes 2 and 8 In The Presence Of Ds Micellesmentioning

confidence: 79%

Calcium‐Selective Electrodes for Measurements in the Presence of Anionic Surfactants

et al. 2011

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“…Addition of Cu2+ ions has the o posite effect to that of Ca2+, the Ib/If values increase. Both C$+ and cu2+ ions associate strongly to SDS and, at the concentrations used here induce precipitation possibly forming lamellar (coagel) structures (20,21,23). However, there is a distinct difference between the C=O bands of the ion-induced and the cooling-induced coagels.…”

Section: Effect Of Structural Changesmentioning

confidence: 79%

“…The structure of micelles may also be changed in the presence of a large excess of added ions (20)(21)(22). In some cases there is rnicellar growth, while in others there are specific ion-micelle interactions such as direct association and precipitation.…”

Section: Effect Of Structural Changesmentioning

confidence: 99%

Infrared spectroscopic studies of surfactant micelles: the behaviour of aliphatic ketones as guests

Casal¹,

Martin²

1989

Can. J. Chem.

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. Can. J. Chem. 67, 1554 (1989). *Aliphatic ketones were incorporated into rnicelles and bilayers formed by various surfactant molecules. These ketones are used as "probe" molecules; hydrogen bonding to their carbonyl groups is easily detected by means of infrared spectroscopy. The extent of hydrogen bonding between the C=O groups and the solvent (DzO) is monitored by a parameter which gives a relative (qualitative) measure of the volumes of different micellar environments. It is also shown that structural changes may induce translocation of the ketone probes and that there are subtle structural differences between cooling-induced and ion-induced coagels.Key words: infrared, micelles, water penetration, bilayers, surfactants.HECTOR L. CASAL et ADELE MARTIN. Can. J. Chem. 67, 1554 (1989).On a incorporC des cCtones aliphatiques dans des micelles et dans des bicouches formCes par divers agents tensioactifs. On a utilisC ces cCtones comrne <>; g r k e ? i la spectroscopie infrarouge, on peut facilement dCtecter la formation de ponts hydrogtnes avec leurs groupements carbonyles. Utilisant un paramttre qui donne une mesure relative (qualitative) des volumes des divers environnements micellaires, on a CvaluC l'importance de la liaison hydrogbne entre les groupements C=O et le solvant (DzO). On montre que les changements structuraux peuvent induire une translocation des <> cktoniques et qu'il existe des diffkrences structurales subtiles entre des coagels induits par le froid ou par les ions.

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“…The precipitation of anionic surfactants with various metal ions has also been widely studied (170)(171). The solubility product principle together with the appropriate ion concentration from mixed micelle theories can be employed to predict the precipitation boundaries in such systems as well.…”

Section: Solid-liquid Phase Equilibria In Mixed Surfactantmentioning

confidence: 99%

Mixed Surfactant Systems

Holland¹,

Rubingh

1992

Mixed Surfactant Systems

251

329

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The properties and behavior of mixed surfactant systems are discussed in the context of experimental techniques and modeling. The overview begins with a general description of mixed surfactant solutions, followed by a more detailed examination of mixed micelles, surfactant mixtures at interfaces, and the phase behavior of mixed systems. Topics include experimental measurements, approaches to modeling, nonideality, unusual surfactant types, micellar demixing, adsorption at various interfaces, chemical reactions in micelles, precipitation, cloud point phenomena and perspectives on the direction of future research on mixed surfactant systems.Mixed surfactant systems are encountered in nearly all practical applications of surfactants. These mixtures arise from several sources. First is the natural polydispersity of commercial surfactants which results from impurities in starting materials and variability in reaction products during their manufacture. These are less expensive to produce than isomerically pure surfactants and often provide better performance. Second is the deliberate formulation of mixtures of different surfactant types to exploit synergistic behavior in mixed systems or to provide qualitatively different types of performance in a single formulation (e.g. cleaning plus fabric softening). Finally, practical formulations often require the addition of surfactant additives to help control the physical properties of the product or improve its stability.

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Calcium effect on the solubility of sodium dodecyl sulfate in sodium chloride solutions

Cited by 56 publications

References 5 publications

Calcium‐Selective Electrodes for Measurements in the Presence of Anionic Surfactants

Calcium‐Selective Electrodes for Measurements in the Presence of Anionic Surfactants

Infrared spectroscopic studies of surfactant micelles: the behaviour of aliphatic ketones as guests

Mixed Surfactant Systems

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