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Continuous electrophoretic separation of charged dyes in liquid foam

journal contribution
posted on 2023-05-30, 10:31 authored by Matthieu FauvelMatthieu Fauvel, Anna TrybalaAnna Trybala, Dmitri TseluikoDmitri Tseluiko, Victor Starov, Hemaka BandulasenaHemaka Bandulasena

A novel electrophoretic separation technique is presented, where continuous electrophoretic separation is demonstrated using free flowing liquid foams. Continuous foam electrophoresis combines the principle of capillary electrophoresis and interactions between analytes and the electrical double layer, with the ability of Free Flow Electrophoresis to continuously separate and recover analytes automatically. A liquid foam is used to provide a network of deformable micro and nano channels with a high surface area, presenting a novel platform for electrophoresis, where interfacial phenomena could be exploited to modify analyte migration. The main purpose of this paper is to present a proof-of-concept study and provide fundamental understanding of a complex foam system in continuous separation mode, i.e. flowing liquid foam under an external electric field with electrophoresis and chemical reactions at the electrodes continuously changing the system. Liquid foam is generated using a mixture of anionic and non-ionic surfactants and pumped through a microfluidic separation chamber between two electrodes. The effectiveness of the device is demonstrated using a dye mixture containing a neutral dye and an anionic dye. At the outlet, the foam is separated and collected into five fractions which are individually probed for the concentration of the two dyes used. The anionic dye was concentrated up to 1.75 (±0.05) times the initial concentration in a select outlet, while the neutral dye concentration remained unchanged in all outlets, demonstrating the potential for electrophoretic foam separations.

Funding

Adventure mini-CDT on “Designed self-assembly of nanoparticles within fluids and at interfaces” at Loughborough University

Marie Curie NanoPaint grant and MAP EVAPORATION project from European Space Agency

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering
  • Science

Department

  • Chemical Engineering
  • Mathematical Sciences

Published in

Colloids and Interfaces

Publisher

MDPI

Version

  • AM (Accepted Manuscript)

Rights holder

© The Authors

Publisher statement

This is an Open Access Article. It is published by MDPI under the Creative Commons Attribution 4.0 International Licence (CC BY). Full details of this licence are available at: https://creativecommons.org/licenses/by/4.0/

Acceptance date

2023-05-26

eISSN

2504-5377

Language

  • en

Depositor

Dr Hemaka Bandulasena. Deposit date: 26 May 2023

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