Osmosis and pervaporation in polyimide submicron microfluidic channel structures


Eijkel, Jan C.T. and Bomer, Johan G. and Berg, Albert van den (2005) Osmosis and pervaporation in polyimide submicron microfluidic channel structures. Applied Physics Letters, 87 (11). p. 114103. ISSN 0003-6951

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Abstract:Osmosis and pervaporation of water through the roof of all-polyimide channels of 500 nm height is described. The phenomena cause both a liquid flow in the channels and a concentration change of dissolved salt. Both effects are amplified due to the thin channel roof and the small channel height. Osmotic movement of demineralized water was observed towards a salt solution and towards ethanol and isopropanol. Water movement by pervaporation was observed from a salt solution towards the atmosphere. Flow velocities of up to 70 µm/s were generated in the channels. The results are in accordance with predictions from the solution-diffusion model for membrane transport. The observed phenomena can be applied in a nanofluidic osmotic pump or for an osmotic or pervaporative concentrator.
Item Type:Article
Copyright:© 2005 American Institute of Physics
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/52858
Official URL:https://doi.org/10.1063/1.2046727
Publisher URL:http://link.aip.org/link/?APPLAB/87/114103/1
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