Advanced

Stray-field NMR diffusion q-space diffraction imaging of monodisperse coarsening foams

Smith, Kieron; Burbidge, Adam; Apperley, David; Hodgkinson, Paul; Markwell, Fraser A.; Topgaard, Daniel LU and Hughes, Eric (2016) In Journal of Colloid and Interface Science 476. p.20-28
Abstract

The technique of stray field diffusion NMR is adapted to study the diffusion properties of water in monodisperse wet foams. We show for the first time, that the technique is capable of observing q-space diffusion diffraction peaks in monodisperse aqueous foams with initial bubble sizes in the range of 50-85 μm. The position of the peak maximum can be correlated simply to the bubble size in the foam leading to a technique that can investigate the stability of the foam over time. The diffusion technique, together with supplementary spin-spin relaxation analysis of the diffusion data is used to follow the stability and coarsening behaviour of monodisperse foams with a water fraction range between 0.24 and 0.33. The monodisperse foams... (More)

The technique of stray field diffusion NMR is adapted to study the diffusion properties of water in monodisperse wet foams. We show for the first time, that the technique is capable of observing q-space diffusion diffraction peaks in monodisperse aqueous foams with initial bubble sizes in the range of 50-85 μm. The position of the peak maximum can be correlated simply to the bubble size in the foam leading to a technique that can investigate the stability of the foam over time. The diffusion technique, together with supplementary spin-spin relaxation analysis of the diffusion data is used to follow the stability and coarsening behaviour of monodisperse foams with a water fraction range between 0.24 and 0.33. The monodisperse foams remain stable for a period of hours in terms of the initial bubble size. The duration of this stable period correlates to the initial size of the bubbles. Eventually the bubbles begin to coarsen and this is observed in changes in the position of the diffusion diffraction maxima.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Coarsening, Diffraction, Diffusion, Foam, Monodisperse, NMR, Relaxation, Stray field
in
Journal of Colloid and Interface Science
volume
476
pages
9 pages
publisher
Elsevier
external identifiers
  • scopus:84977593775
  • wos:000378370100003
ISSN
0021-9797
DOI
10.1016/j.jcis.2016.04.053
language
English
LU publication?
yes
id
3d0718e9-c2e5-4a90-9bdd-05f056a07780
date added to LUP
2016-12-06 09:38:44
date last changed
2017-01-01 08:42:06
@article{3d0718e9-c2e5-4a90-9bdd-05f056a07780,
  abstract     = {<p>The technique of stray field diffusion NMR is adapted to study the diffusion properties of water in monodisperse wet foams. We show for the first time, that the technique is capable of observing q-space diffusion diffraction peaks in monodisperse aqueous foams with initial bubble sizes in the range of 50-85 μm. The position of the peak maximum can be correlated simply to the bubble size in the foam leading to a technique that can investigate the stability of the foam over time. The diffusion technique, together with supplementary spin-spin relaxation analysis of the diffusion data is used to follow the stability and coarsening behaviour of monodisperse foams with a water fraction range between 0.24 and 0.33. The monodisperse foams remain stable for a period of hours in terms of the initial bubble size. The duration of this stable period correlates to the initial size of the bubbles. Eventually the bubbles begin to coarsen and this is observed in changes in the position of the diffusion diffraction maxima.</p>},
  author       = {Smith, Kieron and Burbidge, Adam and Apperley, David and Hodgkinson, Paul and Markwell, Fraser A. and Topgaard, Daniel and Hughes, Eric},
  issn         = {0021-9797},
  keyword      = {Coarsening,Diffraction,Diffusion,Foam,Monodisperse,NMR,Relaxation,Stray field},
  language     = {eng},
  month        = {08},
  pages        = {20--28},
  publisher    = {Elsevier},
  series       = {Journal of Colloid and Interface Science},
  title        = {Stray-field NMR diffusion q-space diffraction imaging of monodisperse coarsening foams},
  url          = {http://dx.doi.org/10.1016/j.jcis.2016.04.053},
  volume       = {476},
  year         = {2016},
}