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When Microrheology, Bulk Rheology, and Microfluidics Meet: Broadband Rheology of Hydroxyethyl Cellulose Water Solutions

Francesco Del Giudice Orcid Logo, Manlio Tassieri, Claude Oelschlaeger, Amy Q. Shen

Macromolecules, Volume: 50, Issue: 7, Pages: 2951 - 2963

Swansea University Author: Francesco Del Giudice Orcid Logo

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DOI (Published version): 10.1021/acs.macromol.6b02727

Abstract

In this work, we present new insights related to a debate on the morphological structure of hydroxyethyl cellulose (HEC) molecules when dissolved in water, i.e., whether HEC adopts a linear-flexible or a rod-like fibrillar configuration. We have employed “seven” rheological techniques to explore the...

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Published in: Macromolecules
ISSN: 0024-9297 1520-5835
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa41013
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first_indexed 2018-07-13T19:35:36Z
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spelling 2023-02-14T15:45:32.7928975 v2 41013 2018-07-13 When Microrheology, Bulk Rheology, and Microfluidics Meet: Broadband Rheology of Hydroxyethyl Cellulose Water Solutions 742d483071479b44d7888e16166b1309 0000-0002-9414-6937 Francesco Del Giudice Francesco Del Giudice true false 2018-07-13 CHEG In this work, we present new insights related to a debate on the morphological structure of hydroxyethyl cellulose (HEC) molecules when dissolved in water, i.e., whether HEC adopts a linear-flexible or a rod-like fibrillar configuration. We have employed “seven” rheological techniques to explore the viscoelastic properties of HEC solutions at different time and length scales. This work demonstrates an excellent convergence between various rheological techniques over a broad range of frequencies and concentrations, allowing us to derive microstructural information for aqueous HEC solutions without the use of complex optical imaging techniques. We find that when dissolved in water unmodified HEC behaves like a linear uncharged polymer, with an entangled mass concentration of ce = 0.3 wt%. Moreover, for the first time we provide the concentration scaling laws (across ce) for the longest relaxation time λ of HEC solutions, obtained from direct readings and not inferred from fitting procedures of fluids shear flow curves. Journal Article Macromolecules 50 7 2951 2963 0024-9297 1520-5835 11 4 2017 2017-04-11 10.1021/acs.macromol.6b02727 COLLEGE NANME Chemical Engineering COLLEGE CODE CHEG Swansea University 2023-02-14T15:45:32.7928975 2018-07-13T14:44:54.2558628 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Francesco Del Giudice 0000-0002-9414-6937 1 Manlio Tassieri 2 Claude Oelschlaeger 3 Amy Q. Shen 4 0041013-31082018114246.pdf DelGiudice2017.pdf 2018-08-31T11:42:46.2270000 Output 2391103 application/pdf Version of Record true 2018-08-31T00:00:00.0000000 This is an open access article published under a Creative Commons Attribution (CC-BY) License. true eng https://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html
title When Microrheology, Bulk Rheology, and Microfluidics Meet: Broadband Rheology of Hydroxyethyl Cellulose Water Solutions
spellingShingle When Microrheology, Bulk Rheology, and Microfluidics Meet: Broadband Rheology of Hydroxyethyl Cellulose Water Solutions
Francesco Del Giudice
title_short When Microrheology, Bulk Rheology, and Microfluidics Meet: Broadband Rheology of Hydroxyethyl Cellulose Water Solutions
title_full When Microrheology, Bulk Rheology, and Microfluidics Meet: Broadband Rheology of Hydroxyethyl Cellulose Water Solutions
title_fullStr When Microrheology, Bulk Rheology, and Microfluidics Meet: Broadband Rheology of Hydroxyethyl Cellulose Water Solutions
title_full_unstemmed When Microrheology, Bulk Rheology, and Microfluidics Meet: Broadband Rheology of Hydroxyethyl Cellulose Water Solutions
title_sort When Microrheology, Bulk Rheology, and Microfluidics Meet: Broadband Rheology of Hydroxyethyl Cellulose Water Solutions
author_id_str_mv 742d483071479b44d7888e16166b1309
author_id_fullname_str_mv 742d483071479b44d7888e16166b1309_***_Francesco Del Giudice
author Francesco Del Giudice
author2 Francesco Del Giudice
Manlio Tassieri
Claude Oelschlaeger
Amy Q. Shen
format Journal article
container_title Macromolecules
container_volume 50
container_issue 7
container_start_page 2951
publishDate 2017
institution Swansea University
issn 0024-9297
1520-5835
doi_str_mv 10.1021/acs.macromol.6b02727
college_str Faculty of Science and Engineering
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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 1
active_str 0
description In this work, we present new insights related to a debate on the morphological structure of hydroxyethyl cellulose (HEC) molecules when dissolved in water, i.e., whether HEC adopts a linear-flexible or a rod-like fibrillar configuration. We have employed “seven” rheological techniques to explore the viscoelastic properties of HEC solutions at different time and length scales. This work demonstrates an excellent convergence between various rheological techniques over a broad range of frequencies and concentrations, allowing us to derive microstructural information for aqueous HEC solutions without the use of complex optical imaging techniques. We find that when dissolved in water unmodified HEC behaves like a linear uncharged polymer, with an entangled mass concentration of ce = 0.3 wt%. Moreover, for the first time we provide the concentration scaling laws (across ce) for the longest relaxation time λ of HEC solutions, obtained from direct readings and not inferred from fitting procedures of fluids shear flow curves.
published_date 2017-04-11T03:52:16Z
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score 10.999524

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