Towards a neutron and X-ray reflectometry environment for the study of solid-liquid interfaces under shear.


Change log
Authors
Armstrong, Alexander J 
McCoy, Thomas M 
Welbourn, Rebecca JL 
Barker, Robert 
Rawle, Jonathan L 
Abstract

A novel neutron and X-ray reflectometry sample environment is presented for the study of surface-active molecules at solid-liquid interfaces under shear. Neutron reflectometry was successfully used to characterise the iron oxide-dodecane interface at a shear rate of [Formula: see text] [Formula: see text] using a combination of conventional reflectometry theory coupled with the summation of reflected intensities to describe reflectivity from thicker films. Additionally, the structure adopted by glycerol monooleate (GMO), an Organic Friction Modifier, when adsorbed at the iron oxide-dodecane interface at a shear rate of [Formula: see text] [Formula: see text] was studied. It was found that GMO forms a surface layer that appears unaltered by the effect of shear, where the thickness of the GMO layer was found to be [Formula: see text] Å under direct shear at [Formula: see text] [Formula: see text] and [Formula: see text] Å when not directly under shear. Finally, a model to analyse X-ray reflectometry data collected with the sample environment is also described and applied to data collected at [Formula: see text] [Formula: see text].

Description
Keywords
40 Engineering, 4016 Materials Engineering
Journal Title
Sci Rep
Conference Name
Journal ISSN
2045-2322
2045-2322
Volume Title
11
Publisher
Springer Science and Business Media LLC
Rights
All rights reserved
Sponsorship
EPSRC (1943259)
Engineering and Physical Sciences Research Council (EP/N509620/1)
Engineering and Physical Sciences Research Council (EP/R022534/1)
ICase award from EPSRC with Infineum UK