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  • Letter

High-speed NMR imaging of capillary action in thin nontransparent porous media

R. Nicasy1, H. P. Huinink1,*, S. J. F. Erich1,2, and O. C. G. Adan1,2

  • 1Eindhoven University of Technology, Applied Physics Department, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
  • 2Organization of Applied Scientific Research, TNO The Netherlands, P.O. Box 49, 2600 AA Delft, The Netherlands

  • *Author to whom correspondence should be addressed: h.p.huinink@tue.nl
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Phys. Rev. E 104, L043101 – Published 19 October, 2021

DOI: https://doi.org/10.1103/PhysRevE.104.L043101

Abstract

An improved high-speed NMR profiling method is introduced that enables us to measure capillary action in thin, nontransparent porous media. Liquid profiles can be measured as fast as 10 ms with a spatial resolution of 14.5μm. Capillary absorption of microliter-sized droplets into nontransparent nylon-6,6 porous membranes was studied. In nylon-6,6 sharp fronts obeying a one-dimensional Darcy model were observed. In paper the uptake did not follow this model: retardation in uptake, broader fluid fronts, and swelling was observed. These measurements nicely demonstrate the possibilities and versatility of the developed method.

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Phys. Rev. E 104, L043101– Published 19 October, 2021
  • Received 4 May 2021
  • Revised 12 July 2021
  • Accepted 22 September 2021
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