Equilibrium and non-equilibrium structures of a polyelectrolyte/surfactant mixture at the oil/water interface
While oppositely charged polyelectrolyte/surfactant mixtures, present in many of the product formulations we use on a daily basis, have been well studied at the air/liquid and solid/liquid interfaces using neutron reflectometry, such work at the liquid/liquid interface has not been attempted to date. Equally, there has been a recent focus on the non-equilibrium properties of these systems both in the bulk and at interfaces due to the presence of kinetically-trapped states. In this work we will make a comparison of the equilibrium and non-equilibrium properties of such a mixture at the oil/water interface for the first time. The former aim will be accessed through adsorption of molecular components from one-phase solutions. The latter aim will be accessed through the dissociation and spreading of material from neutral aggregates with films both transferred from the air/water interface and formed in situ at the oil/water interface. A starting point for the prediction of any of the resulting interfacial structures does not even exist, and our intention is that these measurements will lay the foundation for future work on controlled delivery applications at different fluid interfaces.
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Richard A. Campbell; Armando Maestro; MURPHY Leah; TUMMINO Andrea; VARGA Imre and ZARBAKHSH Ali. (2017). Equilibrium and non-equilibrium structures of a polyelectrolyte/surfactant mixture at the oil/water interface. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-12-460
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