Abstract: Disodium polyoxyethylene/polyoxypropylene fatty acid ethanolamide sulfosuccinates were prepared and some of their surfactancies investigated. With the increase in the polymerization number of oxyalkylene or in the carbon atom number of fatty acid, the critical micelle concentration decreased, the foaming ability reduced, the wetting power of the former reduced and that of the latter tended to enhance. The former was inferior in wetting power to the latter, whereas their difference in foaming ability was insignificant. Used as emulsifiers, the prepared sulfosuccinates showed better emulsion stability compared to sodium lauryl sulfate.

Key words: disodium polyoxyalkylene fatty acid ethanolamide sulfosuccinate, surface activity, critical micelle concentration, wetting power, foaming ability, emulsion stability