The Solution Properties of Sodium Dodecyl Sulfate-Alkyl Glucoside Mixed Surfactant Systems

An examination was made of the solution properties of sodium dodecyl sulfate (SDS) -alkyl glucoside (AG : octyl-, decyl-glucoside) mixed surfactant solutions by comparison with those of SDS-alkyl poly (oxyethylene) ether (CmPOEn : m=10, 12; n=7, 9, 12, 20). The SDS-AG mixed system showed no molecular interaction in mixed micelles, while the SDS-CmPOEnmixed system did so. In the solubilization of the oil soluble dye, SDS-AG mixed systems exhibited no synergism, in contrast to SDS-CmPOEn mixed systems. Increase in the ionic dissociation of mixed micelles by the addition of AG to SDS was less than that by the addition of CmPOEn to SDS. Interaction of SDS and AG would thus appear to occur to leseer extent than that of SDS and CmPOEn. Differences in the hydrophilic group AG and CmPOEn are considered the reasen for this.