Mixed Micelles Containing Alkylglycosides:  Effect of the Chain Length and the Polar Head Group

Abstract

The mixing behavior of binary mixtures of the pure alkylglycosides: β-decylglucoside (β-C10G), β-dodecylglucoside (β-C12G), β-decylmaltoside (β-C10M), and dodecylmaltoside (C12M) in combination with different common surfactants has been studied. First, the effect of the nonionic polar headgroup and chain length of the glycosidic surfactants in the mixed micellization with sodium dodecyl sulfate (SDS) was investigated. Further on, to analyze the effect of the ionic headgroup on the micellization of the glycosidic surfactant, β-C10G was mixed with different surfactants: dodecyltrimethylammonium bromide (DTAB), dodecylheptaethylene glycol ether (C12E7), and β-C10M. All the mixed systems under study adapt reasonably well to the model developed by Rubingh, with negative values for the interaction parameter, βm, indicating a favorable interaction between the mixed surfactants. In the mixtures with SDS and the glycosides, the interactions become stronger when the hydrocarbon chain length of the surfactant is shorter and the hydrophilic headgroup is larger, i.e., when the surfactants become more hydrophilic. The β-C10G mixes favorably with the other surfactants, the interaction becoming stronger in the order C12E7, β-C10M, SDS, DTAB. The strong interaction in micellization with DTAB is explained by assuming an anionic character in the β-C10G molecule, as shown by electroosmosis measurements. Finally, the favorable interaction with β-C10M is explained by considering the packing between the headgroups of both nonionic surfactants.

Comparing Decyl-β-maltoside and Octaethyleneglycol Mono n-Decyl Ether in Mixed Micelles with Dodecyl Benzenesulfonate

“…E-mail: pernilla.liljekvist@ surfchem.kth.se. has a small positive charge character, which is consistent with other studies (2)(3)(4)(5)(6)(7). This was also supported by a slightly negative β CMC parameter obtained for the surfactant mixture C 10 M-C 10 EO 8 , indicating a small net attractive interaction between the two nonionic surfactants.…”

Comparing Decyl-β-maltoside and Octaethyleneglycol Mono n-Decyl Ether in Mixed Micelles with Dodecyl Benzenesulfonate

“…Surface tension of industrial grade APG and linear alkyl benzene sulfonate and fatty alcohol ethoxylates, respectively, have also been investigated with respect to their technical use (9). A comprehensive study of the mixed micelle interaction between different APGs and between an APG and ionic or nonionic (ethoxylated) surfactants have also been conducted (10).…”

Synergism in mixtures of n-octyl-β-d-thioglucoside and different n-alkyltrimethylammonium bromides: effect of the alkyl chain length

“…In fact, this problem has received considerable attention in recent years [8][9][10][11][12][13][14][15][16][17][18][19]. One of the more interesting aspects in this kind of studies is that, as all ionic surfactants have the same head group, the differences observed can be attributed to the length of their hydrocarbon chain.…”