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Adaptive coatings based on polyaniline for direct 2D observation of diffusion processes in microfluidic systems.pdf (9.331Mb)
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Title
Adaptive coatings based on polyaniline for direct 2D observation of diffusion processes in microfluidic systems
Author
Martin-Mayor, Alain ccMondragon Unibertsitatea
Bou-Ali, M. Mounir ccMondragon Unibertsitatea
Tutar, Mustafa ccMondragon Unibertsitatea
Author (from another institution)
Florea, Larisa
Benito Lopez, Fernando
Diamond, Dermont
Meagher, Kate
Research Group
Mecánica de fluidos
Published Date
2016
Publisher
Elsevier
Keywords
Polyaniline
Mixing process
Adaptive coatings
Optical sensor ... [+]
Polyaniline
Mixing process
Adaptive coatings
Optical sensor
Microfluidics
Computational fluid dynamics
(CFD) [-]
Abstract
Microfluidic devices are poised to dramatically influence the future of the process industry. Therefore the understanding and proper evaluation of the flow and mixing behaviour at microscale becomes a ... [+]
Microfluidic devices are poised to dramatically influence the future of the process industry. Therefore the understanding and proper evaluation of the flow and mixing behaviour at microscale becomes a very important issue. In this study, the diffusion behaviour of two reacting solutions of HCl and NaOH were directly observed in a glass/polydimethylsiloxane microfluidic device using adaptive coatings based on the conductive polymer polyaniline that are covalently attached to the microchannel walls. The two liquid streams were combined at the junction of a Y-shaped microchannel, and allowed to diffuse into each other and react. The results showed excellent correlation between optical observation of the diffusion process and the numerical results. A numerical model which is based on finite volume method (FVM) discretisation of steady Navier-Stokes (fluid flow) equations and mass transport equations without reactions was used to calculate the flow variables at discrete points in the finite volume mesh element. The high correlation between theory and practical data indicates the potential of such coatings to monitor diffusion processes and mixing behaviour inside microfluidic channels in a dye free environment. [-]
URI
https://hdl.handle.net/20.500.11984/5624
Publisher’s version
http://dx.doi.org/10.1016/j.snb.2016.03.085
ISSN
0925-4005
Published at
Sensors and Actuators B: Chemical  Vol. 231. Pp. 744-751. August, 2016
Document type
Article
Version
Postprint – Accepted Manuscript
Rights
© 2016 Elsevier B.V. All rights reserved.
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  • Articles - Engineering [483]

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