Imbibition in porous membranes of complex shape: Quasi-stationary flow in thin rectangular segments

Sergio Mendez, Erin M. Fenton, Gil R. Gallegos, Dimiter N. Petsev, Scott S. Sibbett, Howard A. Stone, Yi Zhang, Gabriel P. López

Research output: Contribution to journalArticle

117 Scopus citations

Abstract

The sustained liquid flow of a typical lateral flow assay can be mimicked by two-dimensional shaped, thin porous membranes, specifically rectangular membranes appended to circular sectors. In designing these fan-shaped devices, we have been aided by analytical equations and finite-element simulations. We show both mathematically and experimentally how a continuous increase in unwetted pore volume causes a deviation from traditional imbibition, and leads to quasi-stationary flow in the rectangular element. These results are both theoretically and practically important because they indicate how medical, diagnostic test strips may be fabricated, without incorporating an absorbent pad.

Original languageEnglish (US)
Pages (from-to)1380-1385
Number of pages6
JournalLangmuir
Volume26
Issue number2
DOIs
StatePublished - Jan 19 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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    Mendez, S., Fenton, E. M., Gallegos, G. R., Petsev, D. N., Sibbett, S. S., Stone, H. A., Zhang, Y., & López, G. P. (2010). Imbibition in porous membranes of complex shape: Quasi-stationary flow in thin rectangular segments. Langmuir, 26(2), 1380-1385. https://doi.org/10.1021/la902470b