journal article·2015-03-24Open access

Neutron Reflection Study of the Adsorption of the Phosphate Surfactant NaDEHP onto Alumina from Water

Rebecca J. L. Welbourn, Seung Yeon Lee, Philipp Gutfreund, Arwel Hughes, Ali Zarbakhsh, Stuart M. Clarke

Langmuir· Volume 31· Issue 11

Abstract

The adsorption of a phosphorus analogue of the surfactant AOT, sodium bis(2-ethylhexyl) phosphate (NaDEHP), at the water/alumina interface is described. The material is found to adsorb as an essentially water-free bilayer from neutron reflection measurements. This is similar to the behavior of AOT under comparable conditions, although AOT forms a thicker, more hydrated layer. The NaDEHP shows rather little variation with added salt, but a small thickening of the layer on increasing the pH, in contrast to the behavior of AOT.
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Research context

OpenAlex topics: Iron oxide chemistry and applications · Electrostatics and Colloid Interactions · Spectroscopy and Quantum Chemical Studies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

BP Institute and Department of Chemistry, University of Cambridge, Madingley Rise, Madingley Road, Cambridge, UK

Institute Laue-Langevin, Grenoble, France

ISIS, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, UK

School of Biological & Chemical Sciences, Queen Mary University of London, London, UK

Funding

Engineering and Physical Sciences Research Council · BP Global

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