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Laser Doppler electrophoresis and electro-osmotic flow mapping for the zeta potential measurement of positively charged membrane surfaces

Matthew Walters, SAIF AL AANI, Peter Esteban Orcid Logo, Paul Williams Orcid Logo, Darren Oatley-Radcliffe Orcid Logo

Chemical Engineering Research and Design, Volume: 159, Pages: 468 - 476

Swansea University Authors: SAIF AL AANI, Peter Esteban Orcid Logo, Paul Williams Orcid Logo, Darren Oatley-Radcliffe Orcid Logo

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DOI (Published version): 10.1016/j.cherd.2020.04.022

Abstract

Successful characterization of membranes is of paramount importance for the development and improvement of novel membranes and membrane processes. The characterisation of membrane charge is key to understanding charge interactions between the process stream and the membrane and is typically represen...

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Published in: Chemical Engineering Research and Design
ISSN: 0263-8762
Published: Elsevier BV 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa54159
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The characterisation of membrane charge is key to understanding charge interactions between the process stream and the membrane and is typically represented by the surface zeta potential. In a previous paper (Thomas et al., 2017), a novel technique employing an Uzigirs dip cell arrangement used in conjunction with Laser Doppler Electrophoresis was used to characterize the surface of several negatively charged membranes. In this paper, positively charged modified PTFE membranes are fabricated and the novel zeta potential measurement technique is utilised to quantify the resultant membrane charge by use of a positively charged amidine tracer particle. The amidine particles were characterised and shown to have a positive zeta potential of 12.4 mV for the experimental conditions used. A comparative analysis was made between the novel laser Doppler electrophoresis measurements and tangential streaming potential measurements for the positive membrane and the agreement was good. The phase plot and mobility-displacement were of good quality for the data set, with the surface equivalent mobility being 0.632 &#x3BC;mcm/Vs with R2 = 0.977. In addition, a series of experiments were conducted to explore the operating envelope and highlight the pitfalls of the technique, i.e. oppositely charged particles to the surface should not be used. Overall, this work expands the application of the novel zeta potential measurement technique to span all membrane charge types. 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spelling 2020-06-11T10:21:46.8342392 v2 54159 2020-05-07 Laser Doppler electrophoresis and electro-osmotic flow mapping for the zeta potential measurement of positively charged membrane surfaces d9b43d20ed77afb39906206181147376 SAIF AL AANI SAIF AL AANI true false a02e12611af008764ebda60486a59506 0000-0002-0432-9941 Peter Esteban Peter Esteban true false 3ed8f1e5d997e0fcb256fb6501605cec 0000-0003-0511-4659 Paul Williams Paul Williams true false 6dfb5ec2932455c778a5aa168c18cffd 0000-0003-4116-723X Darren Oatley-Radcliffe Darren Oatley-Radcliffe true false 2020-05-07 Successful characterization of membranes is of paramount importance for the development and improvement of novel membranes and membrane processes. The characterisation of membrane charge is key to understanding charge interactions between the process stream and the membrane and is typically represented by the surface zeta potential. In a previous paper (Thomas et al., 2017), a novel technique employing an Uzigirs dip cell arrangement used in conjunction with Laser Doppler Electrophoresis was used to characterize the surface of several negatively charged membranes. In this paper, positively charged modified PTFE membranes are fabricated and the novel zeta potential measurement technique is utilised to quantify the resultant membrane charge by use of a positively charged amidine tracer particle. The amidine particles were characterised and shown to have a positive zeta potential of 12.4 mV for the experimental conditions used. A comparative analysis was made between the novel laser Doppler electrophoresis measurements and tangential streaming potential measurements for the positive membrane and the agreement was good. The phase plot and mobility-displacement were of good quality for the data set, with the surface equivalent mobility being 0.632 μmcm/Vs with R2 = 0.977. In addition, a series of experiments were conducted to explore the operating envelope and highlight the pitfalls of the technique, i.e. oppositely charged particles to the surface should not be used. Overall, this work expands the application of the novel zeta potential measurement technique to span all membrane charge types. Thus providing a real benefit to the practicing scientist or engineer by having a reliable, fast and simple zeta potential technique that uses only a very small membrane sample. Journal Article Chemical Engineering Research and Design 159 468 476 Elsevier BV 0263-8762 Membrane, Charge, Zeta potential, Positive, Electrophoresis 1 7 2020 2020-07-01 10.1016/j.cherd.2020.04.022 COLLEGE NANME COLLEGE CODE Swansea University 2020-06-11T10:21:46.8342392 2020-05-07T09:26:46.9096155 Matthew Walters 1 SAIF AL AANI 2 Peter Esteban 0000-0002-0432-9941 3 Paul Williams 0000-0003-0511-4659 4 Darren Oatley-Radcliffe 0000-0003-4116-723X 5 54159__17196__3d6bb543764d4eefb7f3a9cdd6af0c24.pdf 54159.pdf 2020-05-07T09:29:24.2638043 Output 1860152 application/pdf Accepted Manuscript true 2021-05-04T00:00:00.0000000 © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license. true eng http://creativecommons.org/licenses/by-nc-nd/4.0/
title Laser Doppler electrophoresis and electro-osmotic flow mapping for the zeta potential measurement of positively charged membrane surfaces
spellingShingle Laser Doppler electrophoresis and electro-osmotic flow mapping for the zeta potential measurement of positively charged membrane surfaces
SAIF AL AANI
Peter Esteban
Paul Williams
Darren Oatley-Radcliffe
title_short Laser Doppler electrophoresis and electro-osmotic flow mapping for the zeta potential measurement of positively charged membrane surfaces
title_full Laser Doppler electrophoresis and electro-osmotic flow mapping for the zeta potential measurement of positively charged membrane surfaces
title_fullStr Laser Doppler electrophoresis and electro-osmotic flow mapping for the zeta potential measurement of positively charged membrane surfaces
title_full_unstemmed Laser Doppler electrophoresis and electro-osmotic flow mapping for the zeta potential measurement of positively charged membrane surfaces
title_sort Laser Doppler electrophoresis and electro-osmotic flow mapping for the zeta potential measurement of positively charged membrane surfaces
author_id_str_mv d9b43d20ed77afb39906206181147376
a02e12611af008764ebda60486a59506
3ed8f1e5d997e0fcb256fb6501605cec
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author_id_fullname_str_mv d9b43d20ed77afb39906206181147376_***_SAIF AL AANI
a02e12611af008764ebda60486a59506_***_Peter Esteban
3ed8f1e5d997e0fcb256fb6501605cec_***_Paul Williams
6dfb5ec2932455c778a5aa168c18cffd_***_Darren Oatley-Radcliffe
author SAIF AL AANI
Peter Esteban
Paul Williams
Darren Oatley-Radcliffe
author2 Matthew Walters
SAIF AL AANI
Peter Esteban
Paul Williams
Darren Oatley-Radcliffe
format Journal article
container_title Chemical Engineering Research and Design
container_volume 159
container_start_page 468
publishDate 2020
institution Swansea University
issn 0263-8762
doi_str_mv 10.1016/j.cherd.2020.04.022
publisher Elsevier BV
document_store_str 1
active_str 0
description Successful characterization of membranes is of paramount importance for the development and improvement of novel membranes and membrane processes. The characterisation of membrane charge is key to understanding charge interactions between the process stream and the membrane and is typically represented by the surface zeta potential. In a previous paper (Thomas et al., 2017), a novel technique employing an Uzigirs dip cell arrangement used in conjunction with Laser Doppler Electrophoresis was used to characterize the surface of several negatively charged membranes. In this paper, positively charged modified PTFE membranes are fabricated and the novel zeta potential measurement technique is utilised to quantify the resultant membrane charge by use of a positively charged amidine tracer particle. The amidine particles were characterised and shown to have a positive zeta potential of 12.4 mV for the experimental conditions used. A comparative analysis was made between the novel laser Doppler electrophoresis measurements and tangential streaming potential measurements for the positive membrane and the agreement was good. The phase plot and mobility-displacement were of good quality for the data set, with the surface equivalent mobility being 0.632 μmcm/Vs with R2 = 0.977. In addition, a series of experiments were conducted to explore the operating envelope and highlight the pitfalls of the technique, i.e. oppositely charged particles to the surface should not be used. Overall, this work expands the application of the novel zeta potential measurement technique to span all membrane charge types. Thus providing a real benefit to the practicing scientist or engineer by having a reliable, fast and simple zeta potential technique that uses only a very small membrane sample.
published_date 2020-07-01T19:53:47Z
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score 11.04748

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