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Issue 11, 2012
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Modeling deformation and contacts of pH sensitive hydrogels for microfluidic flow control

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Abstract

Following a recently developed theory for the constrained swelling of pH-sensitive hydrogels and the finite element user-subroutine technique, we modeled deformation and contacts of pH-sensitive hydrogels for real purpose microfluidic flow control systems. A jacket valve consisting of three cylindrical hydrogels coated on three fixed pillars and a hybrid hydrogel/PDMS system are modeled and analyzed in this paper. We present the deformation and multiple contacts of hydrogel based flow control systems when the pH of the external solution is switched to various values. Also included is the pressure in the contacts, stress distribution, sensitivity of swelling ratio with respect to pH values, and in addition the influence of initial fabrication imperfections.

Graphical abstract: Modeling deformation and contacts of pH sensitive hydrogels for microfluidic flow control

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Publication details

The article was received on 15 Sep 2011, accepted on 08 Dec 2011 and first published on 02 Feb 2012


Article type: Paper
DOI: 10.1039/C2SM06749H
Citation: Soft Matter, 2012,8, 3083-3089
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    Modeling deformation and contacts of pH sensitive hydrogels for microfluidic flow control

    T. He, M. Li and J. Zhou, Soft Matter, 2012, 8, 3083
    DOI: 10.1039/C2SM06749H

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