Counterion condensation on mixed anionic/nonionic surfactant micelles: Bjerrum's limiting condition

Treiner, Claude; Khodja, A. Amar.; Fromon, Michel

doi:10.1016/0021-9797(89)90356-1

Cited by 24 publications

(30 citation statements)

References 14 publications

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“…At low X D the added cationic surfactants are probably entirely or nearly entirely dissociated, i.e., no counterions are bound by the micelles. Counterion binding by the mixed micelles starts only when X D reaches a certain value (52)(53)(54).…”

Section: Effect Of the Mixture Composition On The Mixed Micelle Aggrementioning

confidence: 99%

Mixed Micellization of Dimeric (Gemini) Surfactants and Conventional Surfactants

Alargova

Kochijashky

Sierra

et al. 2001

Journal of Colloid and Interface Science

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Section: Effect Of the Mixture Composition On The Mixed Micelle Aggrementioning

confidence: 99%

Mixed Micellization of Dimeric (Gemini) Surfactants and Conventional Surfactants

Alargova

Kochijashky

Sierra

et al. 2001

Journal of Colloid and Interface Science

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“…Treiner et al 25 studied the degree of Na + binding to mixed micelles of SDS (dodecyl sulfate) and C 12 E 23 [CH 3 (CH 2 ) 11 -O(CH 2 CH 2 O) 23 The role of counterion binding may be evaluated by examining the effect of counterion size; [12][13][14] in particular, bulky counterions, such as tetramethylammonium ion (TMA + ), bind poorly compared to Na + . 17 The dependence of pK a on R for TMACl is shown in Figure 5 (along with data for NaCl).…”

Section: Scheme 1: Synthesis Route Of Carboxyl-terminated Cascade Polmentioning

confidence: 99%

Dissociation of Carboxyl-Terminated Cascade Polymers: Comparison with Theory

Zhang¹,

Dubin²,

Kaplan

et al. 1997

J. Phys. Chem. B

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The dissociation of carboxyl-terminated cascade polymers (generations 1-4) in 0.10 M NaCl has been studied by potentiometric titration. Experimental surface potentials were compared to the theoretical values calculated from the nonlinearized Poisson-Boltzmann equation. Experimental values are smaller than those predicted by theory for generations 2-4 in NaCl. The lower experimental potential is attributed in part to the effect of counterion binding, which is supported by the fact that significantly larger surface potentials are observed when Na + is replaced by tetramethylammonium ion (TMA + ). Potentials higher than those predicted by theory were observed at high degree of dissociation for generations 3 and 4 in TMACl, which may be due to the effect of the high surface charge density of cascade polymers on the local dielectric constant.

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“…These resuks have some bearing on recent potentiometric studies of counter-ion condensation on mixed ionic/nonionic surfactant systems using ion-selective electrodes [7,8]. The experimental results show that the onset of ion-condensation with mixed anionic/ nonionic micelles is dependent on a critical mixed micellar composition (CMMC).…”

Section: Introductionmentioning

confidence: 83%

“…It has been shown recently [7,8,12,13] with little evidence to the contrary [14] that the counter-ion condensation phenomenon in mixed ionic/nonionic surfactant systems does not start with the first addition of ionic surfactant. There is a composition domain for which the counter-ions do not adsorb at the micellar surface.…”

Section: The Degree Of Dissociation Of Mixed Cationic/nonionic Rnicellesmentioning

confidence: 93%

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Counter ion condensation on mixed cationic/nonionic micellar systems: Bjerrum's electrostatic condition

Treiner

Mannebach

1990

Colloid & Polymer Sci

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Abstract:The association of counter-ions with mixedionic/nonionic micelles has been investigated in the case of dodecyl/tetradecyl/and hexadecyl-trimethylammonium bromide with two nonionic surfactants: dodecylpolyoxyethylene 23 and Triton X-100. The degree of association has been measured by potentiometry using a Bromide ion-selective electrode. Previous results with sodium and copper dodecylsulfate suggesting that in the nonionic-rich composition domain, bare mixed micelles are formed without associated counter-ions have been confirmed. These results are in agreement with the prediction of Bjerrum's condition for ion association. The effect of copper dodecylsulfate on the cloud point of Triton X-100 has also been determined as a means of investigating mixed micelles with multivalent counter-ions. The dramatic cloud point increase observed, even larger than with sodium dodecylsulfate, has been discussed as evidence of the solvation of divalent ions by ether groups, a factor which complicates the analysis of multivalent counterion condensation on mixed micelles.

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Counterion condensation on mixed anionic/nonionic surfactant micelles: Bjerrum's limiting condition

Cited by 24 publications

References 14 publications

Mixed Micellization of Dimeric (Gemini) Surfactants and Conventional Surfactants

Mixed Micellization of Dimeric (Gemini) Surfactants and Conventional Surfactants

Dissociation of Carboxyl-Terminated Cascade Polymers: Comparison with Theory

Counter ion condensation on mixed cationic/nonionic micellar systems: Bjerrum's electrostatic condition

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