Size of sodium dodecyl sulfate micelles in the presence of additives. 3. Multivalent and hydrophobic counterions, cationic and nonionic surfactants

Conductometric Studies on the Effect of Temperature and Tetramethylammonium Bromide Salt on the Micellization of Cetyltrimethylammonium Bromide in Aqueous Medium

“…Thus, it was assumed that tetramethyl ammonium salts were accommodated into the micellar interior, under the synergistic hydrophobic interaction [29] as shown in Figure 3. Since both, the surfactant and [(Me)4N + Br -] have similar head group, the decrease in the CMC value was attributed to the synergistic hydrophobic interaction between the nonpolar hydrogen chain of surfactant and alkyl chain of the salt [28], and effective reduction in the electrostatic repulsion between the intermolecular head group which enhanced the CTABr micellization.…”

“…Since both, the surfactant and [(Me)4N + Br -] have similar head group, the decrease in the CMC value was attributed to the synergistic hydrophobic interaction between the nonpolar hydrogen chain of surfactant and alkyl chain of the salt [28], and effective reduction in the electrostatic repulsion between the intermolecular head group which enhanced the CTABr micellization. Figure 4 showed a minimum in the cmc temperature profile characteristics of temperature dependence of cationic surfactant [32,34].…”

“…Organic electrolytes with short chain tetra alkyl ammonium salt are known to penetrate the micellar interaction of the surfactant due to the hydrophobes interaction [28]. Hence they make the micelle shrink and act as spacers between the surfactant head group [29].…”

Biopolymer Surfactant Interactions

“…Adding hydrophobic non-polar additives to cationic surfactant solutions is also found to increase the micellar growth [13,14]. Several research papers on the micellar solution of cationic surfactant and salt systems are available [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. Many cationic micellar solution were prepared from mixing long-chain cationic surfactants such as hexadecyltrimethylammonium (CTA + ) and hexadecylpyridinium (CPy + ) with organic counterions such as, salicylate, Sal -,tosylate T−)), and (HNC−) [32][33][34][35][36][37][38][39][40].…”

Effect of lithium encapsulation by a macrocyclic aza cage in micellar solutions of lithium dodecyl sulfate

“…In ionie micellar solutions the counterion properties have been the object of many experimental and theoretical studies [1][2][3][4][5][6][7][8][9][10]. In most of these, electrostatic interactions have been studied by changing the ionie strength of the micellar solution (mainly by adding a salt), or by changing the counterion.…”