Mixed micelles of series of monomeric and dimeric cationic, zwitterionic, and unequal twin-tail cationic surfactants with sugar surfactants: A fluorescence study

Interaction between ionic liquid and zwitterionic surfactant: A comparative study of two ionic liquids with different anions

“…6 ], respectively, is obtained by fluorescence quenching of pyrene by a cosurfactant cetylpyridinium chloride (CPC) according to the following equation: [67][68][69][70][71][72][73][74] ln Based on earlier reports including our own, the relative trends in N agg and cmc appear counterintuitive; decreased cmc is usually accompanied by increased N agg . There exist few reports on the effect of external additives on the properties of aqueous zwitterionic surfactants [76][77][78][79][80]. Decrease in the cmc of aqueous zwitterionic surfactant systems is observed in the presence of common electrolyte NaCl [76,77], cosurfactants SDS and CTAB (in 1:1 ratio) [76] as well as sugar-based cosurfactants dodecyl-β-Dglucopyranoside [78] and n-dodecyl-β-D-maltoside [79].…”

“…There exist few reports on the effect of external additives on the properties of aqueous zwitterionic surfactants [76][77][78][79][80]. Decrease in the cmc of aqueous zwitterionic surfactant systems is observed in the presence of common electrolyte NaCl [76,77], cosurfactants SDS and CTAB (in 1:1 ratio) [76] as well as sugar-based cosurfactants dodecyl-β-Dglucopyranoside [78] and n-dodecyl-β-D-maltoside [79]. As far as N agg is concerned, it was shown that increasing [NaCl] increased the N agg of zwitterionic surfactant systems [75,80].…”

Conductometric and fluorometric investigations on the mixed micellar systems of cationic surfactants in aqueous media

“…Many investigations have been carried out in the literature on binary surfactant systems [7][8][9][10][11][12][13][14][15][16][17]. The focus has been on the overall effect of the surfactant combination and the determination of the critical micelle concentration (cmc * ), the degree of counter-ion binding, and to analyze the results in terms of well known theories to determine the composition and the nature of interactions of individual monomers of the two surfactants in the mixed micelle [1,4].…”

Behavior of papain in mixed micelles of anionic–cationic surfactants having similar tails and dissimilar head groups

“…This gives a negative deviation in the cmc values for a particular mole fraction. On the other hand, a higher mole fraction of DDAB shows that the experimental cmc values are higher than the corresponding cmc * values which gives the positive deviation in the cmc values and demonstrates a decrease in the hydrophobicity of surfactant mixture [32]. This variation in the cmc values at varying mole fractions of DDAB might be attributed to the charges present on the polar head groups of two surfactants.…”