Interactions of sugar-persubstituted poly(amidoamine) dendrimers with anionic surfactants

The interactions of sugar-persubstituted poly(amidoamine) dendrimers (generation, 3.0 and 5.0) (sugar ball) with anionic surfactants such as sodium do decyl sulfate (SDS) and lithium perfluorooctanesulfonate (LiFOS) were investigated at a constant concentration of the sugar ball. At low surfactant concentrations, aggregates of the anionic surfactants at the surface of the sugar ball are formed, showing a strong surface activity. The size of the mixed aggregates increases with the anionic surfactant concentration and also depends on the generation of the sugar ball: the size for generation 3.0 is greater than that for generation 5.0. The association process is also affected by the kind of hydrophobic chain of the surfactant. These differences reflect solubilization behaviors of biphenyl and decafluorobiphenyl into the mixed systems of the sugar ball and the surfactant.