Thermal Stability of Nonionic Surfactant Aggregates

摘要: A polarity-sensitive probe was used to assess the thermal stability of aggregates six nonionic surfactants in aqueous solution. The I1/I3 peak ratio pyrene emission spectrum, which varies with solvent polarity, taken as an indicator environment and hence surfactant this sequestered. Aggregate stabilities Triton, Igepal, Brij series premicellar, micellar, supramicellar (clouded) solutions were considered. Temperature-induced clouding not found have a measurable effect on sequestered probe. Fully developed micelles exhibited near-linear decrease temperature, similar changes observed pure benzene solvent. In premicellar early micellar stages, however, varied significantly structure size both hydrophobic hydrophilic moieties molecules. least stable assemblies f...