Adsorption of polycation-zwitterionic surfactant mixtures at the water/vapor interface
The interfacial behavior of polyelectrolyte - surfactant mixtures presents non conventional features that are associated with the appearance of non-equilibrium arrested states. This leads to the formation of different kind of aggregates that affect both the equilibrium interfacial composition and the dynamic of incorporation of material to the interface. The scientific and technological interest of such systems includes many fields from drug delivery platform fabrication to functional food and cosmetic formulations. The use of neutron reflectometry is known to help solve the complex behavior of these polymer-surfactant mixtures - both the equilibrium and dynamic ones. In the present proposal we examine mixtures under more industrially-relevant conditions in adsorption troughs. The structure at the static air/water interface will give insight in our previous observations on the surface tension and rheology. The interfacial composition at both the static and dynamic air/water interface will then be compared to help elaborate the real properties of these systems by understanding the dynamics of incorporation of material to the interface.
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Eduardo Guzmán; Richard A. Campbell; FERNANDEZ PENA Laura; Armando Maestro; ORTEGA Francisco and Rubio, R.G.. (2018). Adsorption of polycation-zwitterionic surfactant mixtures at the water/vapor interface. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-12-541
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