Molecular interactions of cationic gemini surfactants (m-s-m) with an environmental friendly nonionic sugar-based surfactant (β-C12G): Interfacial, micellar and aggregation behavior

In the present study, mixtures of cationic gemini surfactants with a non-ionic sugar-based surfactant in aqueous solutions containing electrolyte (NaBr) have been studied. The experimental results were evaluated using the Regular Solution Theory. The strength of interaction of all the surfactants is attributed to the sterical and electrical factors on mixed monolayer and micelle formation and of surfactant–surfactant interactions. The results show stronger interaction at the air/water interface and greater preference for adsorbing at the air/water interface relative to mixed micelle formation in the solution phase. The alkyl chain length and spacer of gemini govern the aggregation behavior of the mixed micelles.