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Investigating Adsorbing Viscoelastic Fluids Using the Quartz Crystal Microbalance
[Image: see text] There is little research on using the quartz crystal microbalance (QCM) with adsorbing viscoelastic fluids. These fluids are widely encountered but often difficult to study as many are opaque and highly viscous. Since the QCM does not involve any scattering or reflection of input r...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7482089/ https://www.ncbi.nlm.nih.gov/pubmed/32923766 http://dx.doi.org/10.1021/acsomega.0c02100 |
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author | Hodges, Chris S. Harbottle, David Biggs, Simon |
author_facet | Hodges, Chris S. Harbottle, David Biggs, Simon |
author_sort | Hodges, Chris S. |
collection | PubMed |
description | [Image: see text] There is little research on using the quartz crystal microbalance (QCM) with adsorbing viscoelastic fluids. These fluids are widely encountered but often difficult to study as many are opaque and highly viscous. Since the QCM does not involve any scattering or reflection of input radiation, it has the potential to study these complex fluids to determine the relative viscoelasticity of the bulk fluid and surface adsorption of active species onto different substrates. In the current study, both Newtonian (sucrose) and viscoelastic (sodium polystyrene sulfonate (NaPSS)) fluids were introduced into the QCM, and the sensor responses were compared. QCM responses of Newtonian sucrose solutions matched the Kanazawa and Gordon model (KG model), as expected. The QCM responses with viscoelastic NaPSS solutions were well below those described by the KG model. A viscoelastic model was used to determine the fluid viscosity and shear modulus at a very high frequency. It was found that the viscosity of NaPSS did not change much compared with low-frequency rheometer measurements, but a significant increase in the shear modulus of several orders of magnitude was found at the QCM frequencies. Modifying the KG model frequency shifts by multiplying by the QCM shear wave decay length ratio, X = δ(V)/δ(N), we were able to match the measured QCM values in viscoelastic NaPSS solutions. The QCM dissipation values for NaPSS were matched in a similar way by multiplying the KG model by X(1/3). By changing the QCM sensor from silica (no NaPSS adsorption) to alumina (NaPSS adsorption), it was shown that the adsorption isotherm of NaPSS on alumina could be recovered and fitted with a Langmuir isotherm despite the frequency response being only a small fraction of the total measured QCM signal. |
format | Online Article Text |
id | pubmed-7482089 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-74820892020-09-11 Investigating Adsorbing Viscoelastic Fluids Using the Quartz Crystal Microbalance Hodges, Chris S. Harbottle, David Biggs, Simon ACS Omega [Image: see text] There is little research on using the quartz crystal microbalance (QCM) with adsorbing viscoelastic fluids. These fluids are widely encountered but often difficult to study as many are opaque and highly viscous. Since the QCM does not involve any scattering or reflection of input radiation, it has the potential to study these complex fluids to determine the relative viscoelasticity of the bulk fluid and surface adsorption of active species onto different substrates. In the current study, both Newtonian (sucrose) and viscoelastic (sodium polystyrene sulfonate (NaPSS)) fluids were introduced into the QCM, and the sensor responses were compared. QCM responses of Newtonian sucrose solutions matched the Kanazawa and Gordon model (KG model), as expected. The QCM responses with viscoelastic NaPSS solutions were well below those described by the KG model. A viscoelastic model was used to determine the fluid viscosity and shear modulus at a very high frequency. It was found that the viscosity of NaPSS did not change much compared with low-frequency rheometer measurements, but a significant increase in the shear modulus of several orders of magnitude was found at the QCM frequencies. Modifying the KG model frequency shifts by multiplying by the QCM shear wave decay length ratio, X = δ(V)/δ(N), we were able to match the measured QCM values in viscoelastic NaPSS solutions. The QCM dissipation values for NaPSS were matched in a similar way by multiplying the KG model by X(1/3). By changing the QCM sensor from silica (no NaPSS adsorption) to alumina (NaPSS adsorption), it was shown that the adsorption isotherm of NaPSS on alumina could be recovered and fitted with a Langmuir isotherm despite the frequency response being only a small fraction of the total measured QCM signal. American Chemical Society 2020-08-27 /pmc/articles/PMC7482089/ /pubmed/32923766 http://dx.doi.org/10.1021/acsomega.0c02100 Text en Copyright © 2020 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes. |
spellingShingle | Hodges, Chris S. Harbottle, David Biggs, Simon Investigating Adsorbing Viscoelastic Fluids Using the Quartz Crystal Microbalance |
title | Investigating Adsorbing Viscoelastic Fluids Using
the Quartz Crystal Microbalance |
title_full | Investigating Adsorbing Viscoelastic Fluids Using
the Quartz Crystal Microbalance |
title_fullStr | Investigating Adsorbing Viscoelastic Fluids Using
the Quartz Crystal Microbalance |
title_full_unstemmed | Investigating Adsorbing Viscoelastic Fluids Using
the Quartz Crystal Microbalance |
title_short | Investigating Adsorbing Viscoelastic Fluids Using
the Quartz Crystal Microbalance |
title_sort | investigating adsorbing viscoelastic fluids using
the quartz crystal microbalance |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7482089/ https://www.ncbi.nlm.nih.gov/pubmed/32923766 http://dx.doi.org/10.1021/acsomega.0c02100 |
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