Neutron reflection study of the adsorption of the phosphate surfactant NaDEHP onto alumina from water.
Change log
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.
Description
Journal Title
Langmuir
Conference Name
Journal ISSN
0743-7463
1520-5827
1520-5827
Volume Title
31
Publisher
American Chemical Society (ACS)
Publisher DOI
Rights and licensing
Except where otherwised noted, this item's license is described as Attribution 2.0 UK: England & Wales
Sponsorship
We thank BP plc and EPSRC for financial support for this work as well as the ISIS and ILL staff and scientists for the allocation of beam time and technical assistance with NR measurements. We also appreciate Chris Sporikou at Department of Chemistry, University of Cambridge, for help with the surfactant synthesis.