The interaction of alkylglycosides with other surfactants

The interaction of n-decyl-beta -maltoside (C10M), n-decyl-beta -glucoside (C(10)G), n-dodecyl-beta -maltoside (C12M), 1:1 (molar) C10M/C(10)G mixture s, and 2 : 1(molar)C12M/n-dodecyl-beta -glucoside (C(12)G) mixtures with an ionic, cationic, nonionic, and zwitterionic surfactants has been investigat ed. The non-glycosidic surfactants used were the the anionic surfactant sod ium dodecylethoxy sulfate (C12ESNa), the cationic surfactants decyl trimeth ylammonium bromide (C(10)TMAB), dodecyl trimethylammonium chloride (C(12)TM AC), and tetradecylammonium bromide (C(14)TMAB), the nonionic surfactant do decyl hexaethoxyethanol (C12EO7), and the zwitterionic surfactant dodecyl-N -benzyl-N-methylglycine (C(12)BMG). The surface properties of the surfactan ts, critical micelle concentration (CMC), effectiveness of surface tension reduction (gamma (CMC)), efficiency of surface tension reduction (pC(20)), maximum surface excess concentration (Gamma (max)), minimum area per molecu le at the air/solution interface (A(min)), and the CMC/C-20 ratio, were det ermined for both the individual surfactants and their mixtures. The glucosi des and maltosides show no significant interaction with each other or with the nonionic surfactant C12EO7 The maltosides interact weakly with the cati onic, anionic, and zwitterionic surfactants. The glucosides interact somewh at more strongly with the same surfactants. Interaction is even stronger wh en glucoside/maltoside mixtures are interacted with the non-glycosidic surf actant. As a result, synergism is most prone to be found in systems contain ing the non-glycosidic surfactant and glucoside/maltoside mixture. (C) 2001 Academic Press.