Stereochemical aspects of micellar properties of esterified glucoside surfactants in water: apparent molar volume, adiabatic compressibility, and aggregation number

The apparent molar volume and the apparent molar adiabatic compressibility of the sugar-based surfactants methyl 6-O-octanoyl-alpha-D-glucopyranoside (alpha-MOnG), methyl 6-O-octanoyl-alpha-D-glucopyranoside (beta-MOnG), and octyl beta-D-grucoside were measured over a wide concentration range. Also, the aggregation number of their micelles was determined from the Debye plo t using static light scattering data. It was found that the micellar aggreg ation number for alpha-MOnG is 179 at 35 degrees C, which is 1.5 times larg er than that for beta-MOnG, suggesting that the anomerism of the head group influences the packing of the monomers during micelle formation.