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4D synchrotron microtomography and pore-network modelling for direct in situ capillary flow visualization in 3D printed microfluidic channels.
- Source :
-
Lab on a Chip . 7/7/2020, Vol. 20 Issue 13, p2403-2411. 9p. - Publication Year :
- 2020
-
Abstract
- Powder-based 3D printing was employed to produce porous, capillarity-based devices suitable for passive microfluidics. Capillary imbibition in such devices was visualized in situ through dynamic synchrotron X-ray microtomography performed at the European Synchrotron Radiation Facility (ESRF) with sub-second time resolution. The obtained reconstructed images were segmented to observe imbibition dynamics, as well as to compute the system effective contact angle and to generate a pore-network to model capillary imbibition. A contact angle gradient was observed resulting in a preferential wicking direction, with the central portion of the microfluidic channel filling faster than the edge areas. The contact angle analysis and the pore-network model results suggest that this is due to spatial variations in the material surface properties arising from both the 3D printing and the subsequent drying processes. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14730197
- Volume :
- 20
- Issue :
- 13
- Database :
- Academic Search Index
- Journal :
- Lab on a Chip
- Publication Type :
- Academic Journal
- Accession number :
- 144320884
- Full Text :
- https://doi.org/10.1039/d0lc00227e