Ionic liquids as modulators of the critical micelle concentration of sodium dodecyl sulfate

Beyaz, Ayse; Oh, Woon Su; Reddy, V. Prakash

doi:10.1016/j.colsurfb.2004.02.014

Cited by 137 publications

(83 citation statements)

References 25 publications

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“…At lower concentrations, ILs behave as electrolytes and decreases the CMC values of aqueous surfactants, whereas at higher concentrations the CMC of the aqueous surfactant increases, which may be due to cosolvent-type behavior of the ILs [22,24,43]. The cations and anions of the ILs have a profound impact on the physicochemical properties of aqueous surfactant solutions [20][21][22][23][24][25][26][27]47]. Looking at such wider roles for ILs, scientist are encouraged to conduct further research on the unexplored features of the systems for better applications in industry.…”

Section: Introductionmentioning

confidence: 98%

“…The aggregation behavior of the ionic [19, 20, 25-29, 31, 33-38, 40], non-ionic [19,23,24,32,41] and zwitterionic [21,22] surfactants with a range of ILs having various cations and anions has been studied in detail. The effect of the hydrophobicity of the alkyl groups of the ILs and surfactant anions on the CMCs, size distributions and thermodynamics of micellization has also been investigated [27,34,35]. Physicochemical properties of aqueous cationic, anionic, non-ionic and zwitterionic surfactants such as the CMC, size of the aggregates, aggregation number, dipolarity and microfluidity have been systematically modified by adding ILs [21][22][23][24][25][26] 4 ] on the physicochemical properties of aqueous anionic and cationic surfactants [28,29,[36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

“…In general, the effect of ILs on the aggregation behavior of surfactants is governed by electrostatic and hydrophobic interactions, which in turn depend on the structural properties of the IL molecule, including the head group, counter ion type and alkyl chain length, as well as the concentration of the ILs in the medium [26,27,34,35,37,47]. At lower concentrations, ILs behave as electrolytes and decreases the CMC values of aqueous surfactants, whereas at higher concentrations the CMC of the aqueous surfactant increases, which may be due to cosolvent-type behavior of the ILs [22,24,43].…”

Section: Introductionmentioning

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: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

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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show abstract

“…These observations implied an overall unfavorable micellization process when the IL was present. Later, the concentration-dependent dual role of the ILs in altering physicochemical properties of ionic surfactant (SDS, CTAB) was demonstrated (Behera & Pandey, 2007a, b;Beyaz et al, 2004;Lei et al, 2007;Modaressi et al, 2007a;Sifaoui et al, 2007). It is found that ILs acted as a metal salt at low concentrations and participated in the micellar phase with increasing [C 4 mim] [PF 6 ] which led to a considerable decrease in the microfluidity of SDS micelles (Behera & Pandey, 2007a, b).…”

Section: Effects Of Ionic Liquids On the Formation Of Supramolecular mentioning

confidence: 99%

Supramolecular Structures in the Presence of Ionic Liquids

Shen¹,

Chen²,

Zhang³

et al. 2011

Ionic Liquids: Theory, Properties, New Approaches

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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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Ionic liquids as modulators of the critical micelle concentration of sodium dodecyl sulfate

Cited by 137 publications

References 25 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

Supramolecular Structures in the Presence of Ionic Liquids

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

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