Journal article 898 views
Relaxation time of polyelectrolyte solutions: When μ-rheometry steps in charge
Francesco Del Giudice
,
Vincenzo Calcagno,
Valeria Esposito Taliento,
Francesco Greco,
Paolo Antonio Netti,
Pier Luca Maffettone
Journal of Rheology, Volume: 61, Issue: 1, Pages: 13 - 21
Swansea University Author:
Francesco Del Giudice
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DOI (Published version): 10.1122/1.4965930
Abstract
Measuring the longest relaxation time of a viscoelastic liquid is an important step in its rheological characterization. In several instances, however, such measurement is unfeasible through conventional techniques, e.g., frequency response in linear viscoelasticity or measure of first normal stress...
Published in: | Journal of Rheology |
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ISSN: | 0148-6055 1520-8516 |
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Society of Rheology
2017
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URI: | https://cronfa.swan.ac.uk/Record/cronfa41011 |
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2018-08-31T12:23:37.4012413 v2 41011 2018-07-13 Relaxation time of polyelectrolyte solutions: When μ-rheometry steps in charge 742d483071479b44d7888e16166b1309 0000-0002-9414-6937 Francesco Del Giudice Francesco Del Giudice true false 2018-07-13 CHEG Measuring the longest relaxation time of a viscoelastic liquid is an important step in its rheological characterization. In several instances, however, such measurement is unfeasible through conventional techniques, e.g., frequency response in linear viscoelasticity or measure of first normal stress difference. This difficulty is often found for very dilute macromolecular solutions. The case of polyelectrolyte solutions is especially important for their relevance in several bioengineering problems: Even theoretical predictions for this case can often not be tested in the absence of an experimental characterization. In this work, we succeed in measuring the relaxation time of two dilute/semidilute polyelectrolyte solutions as a function of added salt concentration. The relaxation time is measured through a novel microrheometrical technique based on the viscoelasticity-induced alignment of particles suspended in a microfluidic channel. We apply such technique to characterize two polyelectrolyte solutions, namely, hyaluronic acid and chitosan solutions. Relaxation times as small as ≈ 60 μs are detected, which are otherwise unmeasurable when using both conventional or other μ-rheometrical techniques. Journal Article Journal of Rheology 61 1 13 21 Society of Rheology 0148-6055 1520-8516 Time measurement, Shear rate dependent viscosity, Solution polymerization, Polyelectrolytes, Relaxation times, Solvents, Viscosity, Microfluidics, Viscoelasticity 31 12 2017 2017-12-31 10.1122/1.4965930 COLLEGE NANME Chemical Engineering COLLEGE CODE CHEG Swansea University 2018-08-31T12:23:37.4012413 2018-07-13T14:43:53.8052030 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Francesco Del Giudice 0000-0002-9414-6937 1 Vincenzo Calcagno 2 Valeria Esposito Taliento 3 Francesco Greco 4 Paolo Antonio Netti 5 Pier Luca Maffettone 6 |
title |
Relaxation time of polyelectrolyte solutions: When μ-rheometry steps in charge |
spellingShingle |
Relaxation time of polyelectrolyte solutions: When μ-rheometry steps in charge Francesco Del Giudice |
title_short |
Relaxation time of polyelectrolyte solutions: When μ-rheometry steps in charge |
title_full |
Relaxation time of polyelectrolyte solutions: When μ-rheometry steps in charge |
title_fullStr |
Relaxation time of polyelectrolyte solutions: When μ-rheometry steps in charge |
title_full_unstemmed |
Relaxation time of polyelectrolyte solutions: When μ-rheometry steps in charge |
title_sort |
Relaxation time of polyelectrolyte solutions: When μ-rheometry steps in charge |
author_id_str_mv |
742d483071479b44d7888e16166b1309 |
author_id_fullname_str_mv |
742d483071479b44d7888e16166b1309_***_Francesco Del Giudice |
author |
Francesco Del Giudice |
author2 |
Francesco Del Giudice Vincenzo Calcagno Valeria Esposito Taliento Francesco Greco Paolo Antonio Netti Pier Luca Maffettone |
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Journal article |
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Journal of Rheology |
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61 |
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13 |
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2017 |
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Swansea University |
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0148-6055 1520-8516 |
doi_str_mv |
10.1122/1.4965930 |
publisher |
Society of Rheology |
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Faculty of Science and Engineering |
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Faculty of Science and Engineering |
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Faculty of Science and Engineering |
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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 |
Measuring the longest relaxation time of a viscoelastic liquid is an important step in its rheological characterization. In several instances, however, such measurement is unfeasible through conventional techniques, e.g., frequency response in linear viscoelasticity or measure of first normal stress difference. This difficulty is often found for very dilute macromolecular solutions. The case of polyelectrolyte solutions is especially important for their relevance in several bioengineering problems: Even theoretical predictions for this case can often not be tested in the absence of an experimental characterization. In this work, we succeed in measuring the relaxation time of two dilute/semidilute polyelectrolyte solutions as a function of added salt concentration. The relaxation time is measured through a novel microrheometrical technique based on the viscoelasticity-induced alignment of particles suspended in a microfluidic channel. We apply such technique to characterize two polyelectrolyte solutions, namely, hyaluronic acid and chitosan solutions. Relaxation times as small as ≈ 60 μs are detected, which are otherwise unmeasurable when using both conventional or other μ-rheometrical techniques. |
published_date |
2017-12-31T03:52:16Z |
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1763752580171694080 |
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11.021648 |