Microemulsion formed by alkyl polyglucoside and an alkyl glycerol ether with weakly charged films

摘要

We have studied the effects on phase equilibria of a nonionic surfactant mixture-water-oil system when replacing small amount of surfactant molecules by ionic surfactant, sodium dodecyl sulfate (SDS). The nonionic surfactant system contains dodecyl-250L?D-maltoside (C_(12)AG2) and iso-octyl glyceryl ether (i-C_8GE) as cosurfactant, water and cyclohexane at constant water to oil ratio of 60/40 (w/w). Adding a small amount of SDS has large impact on the phase behavior. Clear liquid crystalline phase and upper microemulsion phase are added to the phase sequence at high i-C_8GE/(C_(12)AG2+i-C_8GE) ratio. We also compare the phase equilibria of pure dodecyl maltoside system with polyglucosides mixture system.