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Is microrheometry affected by channel deformation?

Francesco Del Giudice Orcid Logo, Francesco Greco, Paolo Antonio Netti, Pier Luca Maffettone

Biomicrofluidics, Volume: 10, Issue: 4, Start page: 043501

Swansea University Author: Francesco Del Giudice Orcid Logo

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DOI (Published version): 10.1063/1.4945603

Abstract

Microrheometry is very important for exploring rheological behaviours of several systems when conventional techniques fail. Microrheometrical measurements are usually carried out in microfluidic devices made of Poly(dimethylsiloxane) (PDMS). Although PDMS is a very cheap material, it is also very ea...

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Published in: Biomicrofluidics
ISSN: 1932-1058
Published: AIP Publishing 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa41010
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first_indexed 2018-07-13T19:35:35Z
last_indexed 2018-08-31T13:37:53Z
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spelling 2018-08-31T12:31:11.5689247 v2 41010 2018-07-13 Is microrheometry affected by channel deformation? 742d483071479b44d7888e16166b1309 0000-0002-9414-6937 Francesco Del Giudice Francesco Del Giudice true false 2018-07-13 CHEG Microrheometry is very important for exploring rheological behaviours of several systems when conventional techniques fail. Microrheometrical measurements are usually carried out in microfluidic devices made of Poly(dimethylsiloxane) (PDMS). Although PDMS is a very cheap material, it is also very easy to deform. In particular, a liquid flowing in a PDMS device, in some circumstances, can effectively deform the microchannel, thus altering the flow conditions. The measure of the fluid relaxation time might be performed through viscoelasticity induced particle migration in microfluidics devices. If the channel walls are deformed by the flow, the resulting measured value of the relaxation time could be not reliable. In this work, we study the effect of channel deformation on particle migration in square-shaped microchannel. Experiments are carried out in several PolyEthylene Oxyde solutions flowing in two devices made of PDMS and Poly(methylmethacrylate) (PMMA). The relevance of wall rigidity on particle migration is investigated, and the corresponding importance of wall rigidity on the determination of the relaxation time of the suspending liquid is examined. Journal Article Biomicrofluidics 10 4 043501 AIP Publishing 1932-1058 Poiseuille flow, Materials fabrication, Materials properties, Polymers, Shear rate dependent viscosity, Fluidic devices, Relaxation times, Viscoelasticity, Rheometry, Microscale flows 31 7 2016 2016-07-31 10.1063/1.4945603 COLLEGE NANME Chemical Engineering COLLEGE CODE CHEG Swansea University 2018-08-31T12:31:11.5689247 2018-07-13T14:41:31.8436711 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Francesco Del Giudice 0000-0002-9414-6937 1 Francesco Greco 2 Paolo Antonio Netti 3 Pier Luca Maffettone 4
title Is microrheometry affected by channel deformation?
spellingShingle Is microrheometry affected by channel deformation?
Francesco Del Giudice
title_short Is microrheometry affected by channel deformation?
title_full Is microrheometry affected by channel deformation?
title_fullStr Is microrheometry affected by channel deformation?
title_full_unstemmed Is microrheometry affected by channel deformation?
title_sort Is microrheometry affected by channel deformation?
author_id_str_mv 742d483071479b44d7888e16166b1309
author_id_fullname_str_mv 742d483071479b44d7888e16166b1309_***_Francesco Del Giudice
author Francesco Del Giudice
author2 Francesco Del Giudice
Francesco Greco
Paolo Antonio Netti
Pier Luca Maffettone
format Journal article
container_title Biomicrofluidics
container_volume 10
container_issue 4
container_start_page 043501
publishDate 2016
institution Swansea University
issn 1932-1058
doi_str_mv 10.1063/1.4945603
publisher AIP Publishing
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Chemical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemical Engineering
document_store_str 0
active_str 0
description Microrheometry is very important for exploring rheological behaviours of several systems when conventional techniques fail. Microrheometrical measurements are usually carried out in microfluidic devices made of Poly(dimethylsiloxane) (PDMS). Although PDMS is a very cheap material, it is also very easy to deform. In particular, a liquid flowing in a PDMS device, in some circumstances, can effectively deform the microchannel, thus altering the flow conditions. The measure of the fluid relaxation time might be performed through viscoelasticity induced particle migration in microfluidics devices. If the channel walls are deformed by the flow, the resulting measured value of the relaxation time could be not reliable. In this work, we study the effect of channel deformation on particle migration in square-shaped microchannel. Experiments are carried out in several PolyEthylene Oxyde solutions flowing in two devices made of PDMS and Poly(methylmethacrylate) (PMMA). The relevance of wall rigidity on particle migration is investigated, and the corresponding importance of wall rigidity on the determination of the relaxation time of the suspending liquid is examined.
published_date 2016-07-31T03:52:16Z
_version_ 1763752580045864960
score 11.014067

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