Self-assembly in aqueous solutions of imidazolium ionic liquids and their mixtures with an anionic surfactant

Smirnova, N. A.; Vanin, A. A.; Сафонова, Е. А.; Pukinsky, Igor B.; Anufrikov, Yuri A.; Makarov, Alexey L.

doi:10.1016/j.jcis.2009.04.004

Cited by 98 publications

(66 citation statements)

References 57 publications

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“…These results are in line with the results reported by several other researchers [27,34,35,37,66,67]. The CMC values of the anionic surfactant SDS decreased significantly on addition of small amounts of [C n mim][X] (n = 4, 6 and 10, X = Br, PF 6 and BF 4 ); the higher the n value, the steeper is the decrease [68]. Regarding the role of the anions to modulate the micellar properties of the aqueous surfactant systems, Pal et al have reported that, for the same alkyl chain length, the CMC values for the anionic surfactants SDS decrease in order of the anion's basicity and the hydration radius of the anion, i.e.…”

Section: Electrical Conductivity Measurementssupporting

confidence: 92%

“…Similar results were reported for aqueous cationic [65,66], anionic [25][26][27][67][68][69] and zwitterionic surfactants [22]. The CMC decreased due to (i) the interaction of the hydrocarbon chain of the ILs with the TTAB chains through hydrophobic forces that can form mixed micelles, and (ii) the electrolyte type behavior of the ILs caused electrostatic stabilization of the micellar surface [66][67][68]. These interactions gave rise to a decrease in the CMC, which is evident from the results of Table 2 and supports the cosurfactant-like behavior of these ILs at higher concentrations [66].…”

Section: Electrical Conductivity Measurementssupporting

confidence: 89%

“…For a fixed Table 2, as the concentration of ILs increases, the CMC of aqueous TTAB decreases (Fig. 2) [20,[66][67][68]. With an increase in [C 6 mim][Br] concentration from 0.0 to 1.0 wt%, the CMC decreases from 3.40 9 10 -3 to 2.40 9 10 -3 molÁdm -3 , whereas, for [C 8 mim][Br], the CMC decreases to 2.20 9 10 -3 molÁdm -3 .…”

Section: Electrical Conductivity Measurementsmentioning

confidence: 99%

See 2 more Smart Citations

Effect of [C n mim][Br] Based Ionic Liquids on the Aggregation Behavior of Tetradecyltrimethylammonium Bromide in Aqueous Medium

Vaid

Bhamoria

et al. 2015

J Solution Chem

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In order to gain insight into the role of environmentally benign imidazolium based ionic liquids (ILs) to alter the physicochemical properties of single chain cationic surfactants, we have investigated the effect of 1-hexyl-3-methylimidazolium bromide ([C 6 mim][Br]) and 1-octyl-3-methylimidazolium bromide ([C 8 mim][Br]) on the aggregation behavior of aqueous tetradecyltrimethylammonium bromide (TTAB). The critical micelle concentration (CMC) of TTAB at different concentrations of ILs was determined through conductance, surface tension, spectral change of a dye by UV-Vis measurement, and the pyrene fluorescence probe measurement techniques at 298.15 K. Decreasing of the CMC of aqueous TTAB with increasing ILs concentration proves the micellization is favorable. The effect of ILs on the properties of TTAB was verified by using NaBr. Surface tension measurements complimented by dynamic light scattering (DLS) data revealed the packing density of TTAB aggregates at different concentrations of ILs. The effective area of TTAB molecules at the air/water interface was calculated by the Gibbs adsorption isotherm and found to decrease up to 0.6 wt% of ILs followed by an increase at higher concentration. DLS data revealed an increase in micellar size of TTAB at higher concentration of IL with decrease in the aggregation number (N agg ), determined by the fluorescence quenching method.

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Section: Electrical Conductivity Measurementssupporting

confidence: 92%

Section: Electrical Conductivity Measurementssupporting

confidence: 89%

Section: Electrical Conductivity Measurementsmentioning

confidence: 99%

See 1 more Smart Citation

Effect of [C n mim][Br] Based Ionic Liquids on the Aggregation Behavior of Tetradecyltrimethylammonium Bromide in Aqueous Medium

Vaid

Bhamoria

et al. 2015

J Solution Chem

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“…In some cases the IL acts as an aqueous cosolvent and modifying some surfactant properties such as the critical micelle concentration (cmc) with respect to the value in neat water because of the weaker solvophobic interaction between the alkyl chain of the surfactant and the IL aqueous solution [1][2][3][4][5][6][7]. The effect of the ionic liquid on the surfactant properties depends on the IL structure and concentration.…”

Section: Introductionmentioning

confidence: 99%

Catanionic surfactant formation from the interaction of the cationic surfactant hexadecyltrimethylammonium bromide (CTAB) and the ionic liquid 1-butyl-3-methylimidazolium octyl sulfate (bmim-octyl SO4) in aqueous solution

Comelles

Ribosa

González

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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The interaction between the cationic surfactant Hexadecyltrimethylammonium bromide (CTAB) and the ionic liquid 1-butyl-3-methylimidazolium octyl sulfate (bmim-octylSO 4 ) in aqueous solution has been investigated at two total concentrations (0.5 and 10 mM) and different CTAB mole fractions ( CTAB ).Samples of different physical appearance were obtained depending on  CTAB suggesting different kind of aggregates. Bluish solutions ( CTAB from 0.1 to 0.6) were assigned to vesicles of the catanionic surfactant formed (CTA-octylSO 4 ), whereas clear and isotropic solutions ( CTAB  0.6) corresponded to mixed micelles. Surface tension, electrical conductivity, absorbance and dynamic light scattering (DLS) measurements were performed with the aim of correlating properties changes with the aggregation structures. The critical aggregation concentration (cac) and the surface tension value at the cac ( cac ) were much lower for the mixtures than for the individual components. Thiis finding reveals the 3 exceptional surface activity of these mixtures, attributable to the formation of the CTA-octylSO 4 catanionic surfactant. Once the catanionic surfactant is formed it makes no sense to consider anymore the initial CTAB / bmim-octylSO 4 binary system but a new one composed by CTA-octylSO 4 and the excess of bmimoctylSO 4 or CTAB. On the basis of this consideration the surface activity parameters have been recalculated.

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“…ILs have also been studied in classical colloid and surface chemistry because of its amphiphilic nature, and IL-based microemulsions are the most popular (Smirnova et al 2009;. The first ILbased microemulsion was reported by Gao et al (2004) where an IL was used to replace water content (Zech et al 2010).…”

mentioning

confidence: 99%

Phase Manifestation and Formation of Nanoemulsions Composed of Imidazolium-based Ionic Liquid, Tween 80/Span 80 and Labrafac Lipophile WL 1349

Woi²,

Eng³

2017

AJSTD

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Self-assembly in aqueous solutions of imidazolium ionic liquids and their mixtures with an anionic surfactant

Cited by 98 publications

References 57 publications

Effect of [C n mim][Br] Based Ionic Liquids on the Aggregation Behavior of Tetradecyltrimethylammonium Bromide in Aqueous Medium

Effect of [C n mim][Br] Based Ionic Liquids on the Aggregation Behavior of Tetradecyltrimethylammonium Bromide in Aqueous Medium

Catanionic surfactant formation from the interaction of the cationic surfactant hexadecyltrimethylammonium bromide (CTAB) and the ionic liquid 1-butyl-3-methylimidazolium octyl sulfate (bmim-octyl SO4) in aqueous solution

Phase Manifestation and Formation of Nanoemulsions Composed of Imidazolium-based Ionic Liquid, Tween 80/Span 80 and Labrafac Lipophile WL 1349

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