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Contactless mass transfer for intra-droplet extraction
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Asano, Shusaku, Takahashi, Yu, Maki, Taisuke, Muranaka, Yosuke, Cherkasov, Nikolay and Mae, Kazuhiro (2020) Contactless mass transfer for intra-droplet extraction. Scientific Reports, 10 (1). 7685. doi:10.1038/s41598-020-64520-4
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WRAP-contactless-mass-transfer-intra-droplet-extraction-Cherkasov-2020.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (1824Kb) | Preview |
Official URL: http://dx.doi.org/10.1038/s41598-020-64520-4
Abstract
This study demonstrates the possibility of “contactless” mass transfer between two aqueous slugs (droplets) separated by an oil slug in Taylor flow inside milli-channels. Separation of the alternating aqueous slugs at the outlet was performed by switching a couple of solenoid valves at branched outlets according to signals obtained by an optical sensor at the branch. Transfer of bromothymol blue (BTB) from acidic to basic aqueous slugs was performed for demonstration. In some cases, aqueous slugs separated by oil, merged catching on each other due to the velocity difference. Interfacial tension which was affected by the solute concentration was responsible for the velocity difference. Position-specific mass transfer activity at the rear end of the aqueous slugs was found on the course of the experiment. A meandering channel decreased the velocity difference and enhanced mass transfer. Almost complete (93%) transfer of BTB was achieved within a short residence time of several minutes under optimized conditions. The presented system opens a way for advanced separation using minimum amounts of the oil phase and allows concentrating the solute by altering relative lengths of the sender and receiver slugs.
| Item Type: | Journal Article | ||||||
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| Subjects: | T Technology > TP Chemical technology | ||||||
| Divisions: | Faculty of Science > Engineering | ||||||
| Library of Congress Subject Headings (LCSH): | Chemical engineering, Fluid dynamics, Mass transfer, Microfluidics | ||||||
| Journal or Publication Title: | Scientific Reports | ||||||
| Publisher: | Nature Publishing Group | ||||||
| ISSN: | 2045-2322 | ||||||
| Official Date: | 6 May 2020 | ||||||
| Dates: |
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| Date of first compliant deposit: | 22 May 2020 | ||||||
| Volume: | 10 | ||||||
| Number: | 1 | ||||||
| Article Number: | 7685 | ||||||
| DOI: | 10.1038/s41598-020-64520-4 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Open Access | ||||||
| RIOXX Funder/Project Grant: |
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