2007
DOI: 10.1016/j.colsurfa.2006.09.031
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CTAB aggregation in aqueous solutions of ammonium based ionic liquids; conductimetric studies

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Cited by 108 publications
(55 citation statements)
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“…1). The present CMC values in water for the different surfactants are found to be in good agreement with the values reported in the literature [16][17][18][19][20][21][22][23][24] and increase with temperature in the range investigated ( Table 1). The temperature effect on the process of micellization of surfactants in water has usually been analyzed in terms of two opposing factors.…”
Section: Effect Of Head Groups On Micellar Parameters In Aqueous Solusupporting
confidence: 91%
“…1). The present CMC values in water for the different surfactants are found to be in good agreement with the values reported in the literature [16][17][18][19][20][21][22][23][24] and increase with temperature in the range investigated ( Table 1). The temperature effect on the process of micellization of surfactants in water has usually been analyzed in terms of two opposing factors.…”
Section: Effect Of Head Groups On Micellar Parameters In Aqueous Solusupporting
confidence: 91%
“…In the case of the cationic surfactant hexadecyltrimethylammonium bromide (CTAB) the effect of ILs on the surfactant cmc confirms the trend above described [8][9][10][11][12][13]. However, when IL posses surface activity as reported for long alkyl chain ionic liquids [14][15][16][17][18][19][20][21] and some short alkyl chain ILs [22,23] the ionic liquid / surfactant mixture behaves as a typical binary surfactant system [24][25][26]. In these binary systems the mixed micelle composition X 1 M as well as the  M interaction parameter quantifying the synergism can be obtained by applying the equations of the Regular Solution Theory [27].…”
Section: Introductionsupporting
confidence: 69%
“…The addition of NaBr decreased the CMC to 2.30 9 10 -3 molÁdm -3 , which is higher than that in the presence of either IL, which is attributed to the greater surface activity of the ILs compared to NaBr [68]. It is noteworthy that the addition of inorganic salts decreases the CMC of aqueous surfactant solutions [58,[70][71][72][73][74][75][76]. Addition of ILs decreases the thickness of ionic atmosphere surrounding the ionic head groups and consequently decreases the electrostatic repulsion between ionic head groups of surfactants in the micelle, thus decreasing the CMC.…”
Section: Surface Tension Measurementsmentioning
confidence: 83%
“…Comparisons of the results with ILs confirmed the unique behavior of ILs as electrolytes at lower concentration. The CMC values decrease due to the formation of charged ions of the cationic surfactants with the IL's ions, which lowers electrostatic repulsion and favors aggregation [59,[70][71][72][73][74][75][76]. Domanska [77] reported decreases in the CMC value of aqueous CTAB with the addition of ILs such as propyl-(2-hydroxyethyl)-dimethyl-ammonium bromide, butyl-(2-hydroxyethyl)-dimethylammonium bromide, and didecyl-dimethylammonium nitrate.…”
Section: Electrical Conductivity Measurementsmentioning
confidence: 96%