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When Microrheology, Bulk Rheology, and Microfluidics Meet: Broadband Rheology of Hydroxyethyl Cellulose Water Solutions
Macromolecules, Volume: 50, Issue: 7, Pages: 2951 - 2963
Swansea University Author: Francesco Del Giudice
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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...
Published in: | Macromolecules |
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ISSN: | 0024-9297 1520-5835 |
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2017
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URI: | https://cronfa.swan.ac.uk/Record/cronfa41013 |
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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 |
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7 |
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2951 |
publishDate |
2017 |
institution |
Swansea University |
issn |
0024-9297 1520-5835 |
doi_str_mv |
10.1021/acs.macromol.6b02727 |
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Faculty of Science and Engineering |
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facultyofscienceandengineering |
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Faculty of Science and Engineering |
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facultyofscienceandengineering |
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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 |
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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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1763752580425449472 |
score |
11.016235 |