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A Three-Step Scenario Involved in Particle Capture on a Pore Edge

Duru, Paul and Hallez, Yannick A Three-Step Scenario Involved in Particle Capture on a Pore Edge. (2015) Langmuir, vol. 31 (n° 30). pp. 8310-8317. ISSN 0743-7463

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Official URL: http://dx.doi.org/10.1021/acs.langmuir.5b01298

Abstract

A scenario is proposed to describe the capture of a spherical particle around a cylindrical pore. This geometry, “ideal” as far as the problem of particle capture on a filtration membrane is concerned, is clearly relevant in view of the pore-scale geometry of nucleopore or microsieve filtration membranes, and also of some microfluidic systems used to perform fluid−particle separation. The present scenario consists of three successive steps: particle deposition on the membrane away from the pore, subsequent reentrainment of some of the deposited particles by rolling on the membrane surface, and final arrest by a stabilizing van der Waals torque when the particle rolls over the pore edge. A modeling of these three steps requires the hydrodynamic and physicochemical particle−membrane interactions to be detailed close to the singular pore edge region and raises questions concerning the role of particle surface roughness. The relevance and robustness of such of a scenario for rough micrometer-sized latex particles is emphasized and comparisons are made with existing experimental data.

Item Type:Article
Additional Information:Thanks to American Chemical Society editor. The definitive version is available at http://pubs.acs.org/ The original PDF of the article can be found at Langmuir website : http://pubs.acs.org/journal/langd5
HAL Id:hal-01223261
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS (FRANCE)
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Deposited By: Yannick HALLEZ
Deposited On:28 Oct 2015 10:19

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