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

Smith, Kieron; Burbidge, Adam; Apperley, David C.; Hodgkinson, Paul; Markwell, Fraser A.; Topgaard, Daniel; Hughes, Eric

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 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.

Citation

Smith, K., Burbidge, A., Apperley, D. C., Hodgkinson, P., Markwell, F. A., Topgaard, D., & Hughes, E. (2016). Stray-field NMR diffusion q-space diffraction imaging of monodisperse coarsening foams. Journal of Colloid and Interface Science, 476, 20-28. https://doi.org/10.1016/j.jcis.2016.04.053

• Journal Article Type: Article
• Acceptance Date: Apr 28, 2016
• Online Publication Date: May 6, 2016
• Publication Date: Aug 15, 2016
• Deposit Date: May 6, 2016
• Publicly Available Date: May 12, 2016
• Journal: Journal of colloid and interface science.
• Electronic ISSN: 1095-7103
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 476
• Pages: 20-28
• DOI: https://doi.org/10.1016/j.jcis.2016.04.053
• Public URL: https://durham-repository.worktribe.com/output/1412881