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Electrochemical ‘bubble swarm’ enhancement of ultrasonic surface cleaning

Electrochemical ‘bubble swarm’ enhancement of ultrasonic surface cleaning
Electrochemical ‘bubble swarm’ enhancement of ultrasonic surface cleaning
An investigation of surface cleaning using a swarm of gas bubbles within an acoustically activated stream is presented. Electrolysis of water at Pt microwires (100 ?m diameter) to produce both hydrogen and oxygen bubbles is shown to enhance the extent of ultrasonic surface cleaning in a free flowing water stream containing an electrolyte (0.1 M Na2SO4) and low surfactant concentration (2 mM SDS). The surfactant was employed to allow control of the average size of the bubble population within the swarm. The electrochemical bubble swarm (EBS) is shown to perturb acoustic transmission through the stream. To optimise the cleaning process both the ultrasonic field and the electrochemical current are pulsed and synchronized but with different duty cycles. Cleaning action is demonstrated on structured surfaces (porcine skin and finger mimics) loaded with fluorescent particles. This action is shown to be significantly enhanced compared to that found with an inherent bubble population produced by the flow and acoustic regime alone under the same conditions.
1463-9076
21709-21715
Birkin, P.R.
ba466560-f27c-418d-89fc-67ea4f81d0a7
Offin, D.G.
b50fb831-2455-4ec3-a599-71ae4e7f235b
Vian, C.J.B.
214a1f39-d0ed-4efe-bf64-83937cd1acfe
Leighton, T.G.
3e5262ce-1d7d-42eb-b013-fcc5c286bbae
Birkin, P.R.
ba466560-f27c-418d-89fc-67ea4f81d0a7
Offin, D.G.
b50fb831-2455-4ec3-a599-71ae4e7f235b
Vian, C.J.B.
214a1f39-d0ed-4efe-bf64-83937cd1acfe
Leighton, T.G.
3e5262ce-1d7d-42eb-b013-fcc5c286bbae

Birkin, P.R., Offin, D.G., Vian, C.J.B. and Leighton, T.G. (2015) Electrochemical ‘bubble swarm’ enhancement of ultrasonic surface cleaning. Physical Chemistry Chemical Physics, 17 (33), 21709-21715. (PMID:26234563)

Record type: Article

Abstract

An investigation of surface cleaning using a swarm of gas bubbles within an acoustically activated stream is presented. Electrolysis of water at Pt microwires (100 ?m diameter) to produce both hydrogen and oxygen bubbles is shown to enhance the extent of ultrasonic surface cleaning in a free flowing water stream containing an electrolyte (0.1 M Na2SO4) and low surfactant concentration (2 mM SDS). The surfactant was employed to allow control of the average size of the bubble population within the swarm. The electrochemical bubble swarm (EBS) is shown to perturb acoustic transmission through the stream. To optimise the cleaning process both the ultrasonic field and the electrochemical current are pulsed and synchronized but with different duty cycles. Cleaning action is demonstrated on structured surfaces (porcine skin and finger mimics) loaded with fluorescent particles. This action is shown to be significantly enhanced compared to that found with an inherent bubble population produced by the flow and acoustic regime alone under the same conditions.

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More information

Accepted/In Press date: 16 July 2015
e-pub ahead of print date: 3 August 2015
Published date: 7 September 2015
Organisations: Chemistry, Inst. Sound & Vibration Research

Identifiers

Local EPrints ID: 381291
URI: https://eprints.soton.ac.uk/id/eprint/381291
ISSN: 1463-9076
PURE UUID: 1bafcbaf-3cc5-4fa2-b870-1f794b9744b8
ORCID for P.R. Birkin: ORCID iD orcid.org/0000-0002-6656-4074
ORCID for T.G. Leighton: ORCID iD orcid.org/0000-0002-1649-8750

Catalogue record

Date deposited: 04 Sep 2015 14:25
Last modified: 14 Jul 2018 00:36

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