Polyoxyalkylene block copolymers adsorbed in hydrocarbon and fluorocarbon oil-in-water emulsions
Literature Information
Stephen King, Clive Washington, Richard Heenan
Small-angle neutron scattering has been used to investigate the structure of the adsorbed layers formed by three poly(oxyethylene)-poly(oxypropylene) block copolymers (Poloxamer 188, Poloxamer 407 and Poloxamine 908) in two similar oil-in-water emulsions; one with a fluorocarbon oil phase, the other with a hydrocarbon oil phase. We find that the structure of the buoy layer is remarkably similar in the two cases. Since previous work has shown that the fluorocarbon/water interface is impenetrable to these polymers, these new findings also suggest that there cannot be significant penetration of the hydrocarbon/water interface. This is discussed in relation to the findings from other studies. The effects of added electrolyte and temperature on the adsorbed layer structure are also reported.
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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.











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