Adsorption and Distribution of Components of Cocoamidopropyl Betaine-Lysozyme Mixtures in Water/Octane System

The scintillation phase method, interfacial tensiometry, and dynamic light scattering have been employed to study the behavior of mixtures composed of a globular protein, lysozyme, and a zwitterionic surfactant, cocoamidopropyl betaine, in a water/octane system. The comparison between the absorption values of the components, interfacial tensions, component concentrations, and aggregate sizes in the phases that are in contact, together with the analysis of the interaction between the components and the structure and surface activity of resulting aggregates, has made it possible to propose a mechanism for the behavior of the proteinzwitterionic surfactant mixture in the two-phase system.