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Foam-based electrophoretic separation of charged dyes

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posted on 2022-12-16, 13:30 authored by Matthieu FauvelMatthieu Fauvel, Anna TrybalaAnna Trybala, Dmitri TseluikoDmitri Tseluiko, Victor Starov, Hemaka BandulasenaHemaka Bandulasena

Electrophoretic separation of a fluorescent dye mixture, containing rhodamine B and fluoresceine, in liquid foams stabilised by either anionic, cationic or non-ionic surfactants in water-glycerol mixtures was studied in a custom-designed foam separation device. The effects of the external electric field applied across the foam and the initial pH of the solution on the effectiveness of separation was also studied. The fluid motion due to electroosmosis and resulting back pressure within the foam and local pH changes was found to be complex and affected the separation. Fluorescein dye molecules, which have a positive or negative charge depending on the solution pH, aggregated in the vicinity of an electrode leaving a pure band of neutral dye rhodamine B. The effectiveness of the separation was quantified by the percentage width of the pure rhodamine B band, which was found to be between 29% and 42%. This study demonstrates the potential of liquid foam as a platform for electrophoretic separation. 

Funding

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

Marie Curie NanoPaint grant

MAP EVAPORATION project from European Space Agency

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering
  • Science

Department

  • Chemical Engineering
  • Mathematical Sciences

Published in

Langmuir

Volume

38

Issue

45

Pages

13935-13942

Publisher

American Chemical Society

Version

  • VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This is an Open Access Article. It is published by the American Chemical Society 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

2022-10-25

Publication date

2022-11-02

Copyright date

2022

ISSN

0743-7463

eISSN

1520-5827

Language

  • en

Depositor

Dr Hemaka Bandulasena. Deposit date: 25 October 2022

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