Mixed micelles of alkylamines and cetyltrimethylammonium chloride

Markov chain model for the critical micelle concentration of surfactant mixtures

“…Finally, if β 12 is large and positive, β 12 >ln(cmc 1 /cmc 2 ), the mixture can have cmc larger than both cmc 1 and cmc 2 of the pure surfactants-a phenomenon known as antagonism. The data for m i x e d h e x a d e c y l t r i m e t h y l a m m o n i u m c h l o r i d e (C 16 Me 3 NCl) and dodecylamine (C 12 NH 2 ) reported by García-Río et al [25] seem to display such a behavior, cf. Fig.…”

“…c An antagonistic system-data from Ref. [25] for C 16 an equation analogous to the Duhem-Margules relation [6,17]. Substituting here Eq.…”

Influence of n-alkyl acids on the percolative phenomena in AOT-based microemulsions

“…In particular, microemulsions-as phase transfer catalysis systems-are able to enhance reactions between nonhydrosoluble organic substrates and hydrosoluble reagents and, as a result, the kinetics of numerous reactions in microemulsions have been studied [2,[23][24][25][26][27][28][29][30]. Electric conductivity measurements constitute a very useful technique for obtaining information about micellar interactions [31][32][33][34][35][36]. Generally, a microemulsion presents a very low specific conductivity.…”

Factors determining the catalytic activity of the mixed micellar system cetyltrimethylammonium bromide-Brij-35 in the hydrolysis of a phosphonic acid ester

“…Although the number of pub lications on mixed micellization, including studies using theoretical and semiempirical approaches, has increased in the last 2-3 years, the basic features of the functioning of binary surfactant systems still need a more profound consideration. The reactivity of com pounds in mixed systems remains a poorly explored area [10][11][12][13][14][15][16][17].Earlier, we studied the micellization properties and catalytic effects of binary micellar systems based on the cationic surfactant cetyltrimethylammonium bro mide (CTAB). The following nonionic surfactants were examined as the second component: polyethyl ene glycol(~9) monotetradecyl ether [18], polyethyl ene glycol(10) oleyl ether (Brij 97) (C 14 E 9 ) [19], and polyethylene glycol(10) mono 4 isooctylphenyl ether [20,21].…”

“…Although the number of pub lications on mixed micellization, including studies using theoretical and semiempirical approaches, has increased in the last 2-3 years, the basic features of the functioning of binary surfactant systems still need a more profound consideration. The reactivity of com pounds in mixed systems remains a poorly explored area [10][11][12][13][14][15][16][17].…”