Effects of carbohydrates on the solution properties of surfactants and dye-micelle complexation

The self aggregation of sodium dodecylsulfate (SDS), octyl phenyl polyoxyethylene ether (Triton X-100), polyoxyethylene sorbitan monolaurate (Tween 20), monopalmitate (Tween 40), monostearate (Tween 60) and monooleate (Tween 80) and the binding of the dye safranine T (ST) with micelles of the above surfactants have been studied by absorption, emission and tensiometric methods in the presence of glucose, galactose, sucrose and maltose. The carbohydrates have been observed to appreciably affect the critical micellar concentration (CMC) of the surfactants, their aggregation number and the ST-micelle binding constant. The results have been attempted to rationalize on physical chemical basis. (C) 1999 Elsevier Science S.A. All rights reserved.