Charge number effect on the miscibility of inorganic salt and surfactant in adsorbed film and micelle: Inorganic salt–octyl methyl sulfoxide mixtures

Iyota, Hidemi; Tomimitsu, Takako; Shimada, Kazuko; Ikeda, Norihiro; Motomura, Kinsi; Aratono, Makoto

doi:10.1016/j.jcis.2006.01.050

Cited by 10 publications

(14 citation statements)

References 23 publications

(34 reference statements)

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“…The γ C of the CaCl 2 and LaCl 3 systems are almost the same and a little smaller than that of the NaCl system. The change of γ C withX 2 for the salt-DAC mixtures is in sharp contrast with the constant γ C irrespective ofX 2 for the salt-nonionic surfactant mixtures [1]. In a conventional study that treats inorganic salts as additives, the decrease in γ C with decreasingX 2 may be explained by the electrostatic-shielding effect of the counterion on the repulsion between the ionic head groups of DAC in the adsorbed film.…”

Section: Resultsmentioning

confidence: 83%

“…1 and 2, where γ 1±,m 1 is the dependence of the mean activity coefficient γ 1± of salt on m 1 [9,10] and Φ is a function of stoichiometric numbers andX 2 (see the Appendix in Ref. [1]). …”

Section: Resultsmentioning

confidence: 99%

“…CaCl 2 and LaCl 3 are the same samples as those used in the previous study [1]. Water, deionized and distilled, was further purified by distilling it twice from dilute alkaline potassium permanganate solution.…”

Section: Methodsmentioning

confidence: 99%

“…In the previous paper [1], it was found that inorganic ions and nonionic surfactants interact slightly attractively in adsorbed films and micelles, and the effect of the charge number of inorganic ions on those oriented molecular states is not great for a nonionic surfactant. For ionic surfactants, physicochemical states of adsorbed films and micelles are dominated by the electrostatic interaction among ionic head groups of surfactants and inorganic ions and highly dependent on the concentrations and charge numbers of counterions and not so much on those of inorganic co-ions [2,3].…”

Section: Introductionmentioning

confidence: 96%

“…We selected calcium and lanthanum chlorides as multivalent salts just as in the corresponding study for nonionic surfactants [1], and dodecylammonium chloride (DAC) as a cationic surfactant because its adsorption and micelle formation are well studied in the absence and the presence of NaCl [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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Charge number effect on the miscibility of inorganic salt and surfactant in adsorbed film and micelle: Inorganic salt–dodecylammonium chloride mixtures

Iyota¹,

Tomimitsu²,

Aratono³

2006

Journal of Colloid and Interface Science

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The effect of inorganic salts with different charge numbers of cations on the adsorption and micelle formation of dodecylammonium chloride (DAC) was clarified by applying the thermodynamic treatment of surfactant mixtures to mixtures of DAC with calcium and lanthanum chlorides and comparing the results with those of the sodium chloride-DAC mixture in the previous study. Surface tension of aqueous solutions of the salt-DAC mixture was measured as a function of the total molality of the mixture and the mole fraction of DAC in the mixture at 298.15 K under atmospheric pressure. Judging from the phase diagrams of adsorption and micelle formation obtained from the surface tension measurement, dodecylammonium cations expel inorganic cations from the adsorbed film and micelle and the repulsive interaction between dodecylammonium and inorganic cations increases with increasing charge number of the inorganic cation.

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Section: Resultsmentioning

confidence: 83%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Charge number effect on the miscibility of inorganic salt and surfactant in adsorbed film and micelle: Inorganic salt–dodecylammonium chloride mixtures

Iyota¹,

Tomimitsu²,

Aratono³

2006

Journal of Colloid and Interface Science

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Synthesis and Characterization of Novel Surfactants based on 2‐Hydroxy‐4‐(Methylthio)Butanoic Acid Part 3: Microemulsions from Nonionic Sulfoxide Ester Surfactants

Shahrashoob

Long

et al. 2018

J Surfact & Detergents

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In this work, ester sulfoxide (ESO) surfactants based on 2‐hydroxy‐4‐(methylthio) butyric acid are shown to have temperature‐sensitive microemulsion phase behaviors. Both C10 (C10ESO) and C12 (C12ESO) surfactants studied contained one sulfoxide unit in the structure. Phase inversion temperatures (PIT) and interfacial tensions (IFT) between water‐rich and oil‐rich phases have been measured for ternary systems of water, oil, and sulfoxide surfactants. Hydrophilic–lipophilic deviation (HLD) parameters of these surfactants were obtained by fitting the experimental data to a semiempirical HLD equation. The characteristic surfactant parameter and temperature sensitivity of C10ESO and C12ESO surfactants were obtained and compared with similar ethoxylated alcohol surfactants. By comparing the characteristic parameters of these surfactants with those of ethoxylated alcohol surfactants, it was shown that one sulfoxide ester moiety is equally hydrophilic as approximately 5 ethylene oxide groups. The temperature sensitivity of the ESO was roughly a factor of four less than ethoxylated surfactants based on the temperature coefficient of the HLD equation.

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Miscibility of sodium chloride and sodium dodecyl sulfate in the adsorbed film and aggregate

Iyota

Krastev

2009

Colloid Polym Sci

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The adsorption, micelle formation, and salting out of sodium dodecyl sulfate in the presence of sodium chloride were studied from the viewpoint of their mixed adsorption and aggregate formation. The surface tension of aqueous solutions of a sodium chloride-sodium dodecyl sulfate mixture was measured as a function of the total molality and composition of the mixture. Phase diagrams of adsorption and aggregate formation were obtained by applying thermodynamic equations to the surface tension. Judging from the phase diagrams, sodium chloride and sodium dodecyl sulfate are miscible in the adsorbed film at very large composition of sodium chloride and in the saltedout crystalline particle, while they are immiscible in the micelle. The miscibilities in the adsorbed film, micelle, and crystalline particle increase in the following order: particle > adsorbed film > micelle. The difference in miscibility among the oriented states was ascribed to the difference in geometry between the adsorbed film and micelle and to the interaction between bilayer surfaces in the particle.

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Charge number effect on the miscibility of inorganic salt and surfactant in adsorbed film and micelle: Inorganic salt–octyl methyl sulfoxide mixtures

Cited by 10 publications

References 23 publications

Charge number effect on the miscibility of inorganic salt and surfactant in adsorbed film and micelle: Inorganic salt–dodecylammonium chloride mixtures

Charge number effect on the miscibility of inorganic salt and surfactant in adsorbed film and micelle: Inorganic salt–dodecylammonium chloride mixtures

Synthesis and Characterization of Novel Surfactants based on 2‐Hydroxy‐4‐(Methylthio)Butanoic Acid Part 3: Microemulsions from Nonionic Sulfoxide Ester Surfactants

Miscibility of sodium chloride and sodium dodecyl sulfate in the adsorbed film and aggregate

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