Consideration of Nonuniformity in Elongation of Microstructures in a Mechanically Tunable Microfluidic Device for Size-Based Isolation of Microparticles

This paper presents an investigation of the nonlinearity behavior in deformation that appears during the linear stretching of the elastomeric microstructures in a pillar-based microfilter. Determining the impact of the nonuniformity in strain on the geometry and performance of such a planar device u...

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Bibliographic Details
Published in:Journal of microelectromechanical systems 2015-04, Vol.24 (2), p.309-318
Main Authors: Alvankarian, Jafar, Jaddi, Najmeh Sadat, Vakilian, Mohammadmahdi, Barantalab, Fatemeh, Jamal, Rahman, Majlis, Burhanuddin Yeop
Format: Article
Language:English
Subjects:
elastomeric device
Force
Loading
microfluidic rapid adjustment
Microstructure
Non-uniform strain
pillar-based microfilter
Resins
Strain
Stress
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Summary:This paper presents an investigation of the nonlinearity behavior in deformation that appears during the linear stretching of the elastomeric microstructures in a pillar-based microfilter. Determining the impact of the nonuniformity in strain on the geometry and performance of such a planar device under in-plane stretch is the motivation for this study. A semiempirical model is used to explain the physical strain-stress behavior from the root to the tip of the micropillars in the linear arrays in the device. For microfabrication of the device, the main substrate is elastomeric polyurethane methacrylate, which is utilized in an ultraviolet-molding method. Optical imaging and scanning electron microscopy were used to evaluate the deformation of the microstructures under different loading conditions. It was demonstrated that by applying mechanical strains of
ISSN:1057-7157
1941-0158
DOI:10.1109/JMEMS.2014.2378314