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Steady and Oscillatory Shear Flow Behavior of Different Polysaccharides with Laponite(®)
The rheological behavior, in terms of steady and oscillatory shear flow, of Laponite(®) with different polysaccharides (alginate, chitosan, xanthan gum and levan) in salt-free solutions was studied. Results showed that a higher polymer concentration increased the zero-rate viscosity and decreased th...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8004235/ https://www.ncbi.nlm.nih.gov/pubmed/33809920 http://dx.doi.org/10.3390/polym13060966 |
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author | Blanco-López, Marcos González-Garcinuño, Álvaro Tabernero, Antonio Martín del Valle, Eva M. |
author_facet | Blanco-López, Marcos González-Garcinuño, Álvaro Tabernero, Antonio Martín del Valle, Eva M. |
author_sort | Blanco-López, Marcos |
collection | PubMed |
description | The rheological behavior, in terms of steady and oscillatory shear flow, of Laponite(®) with different polysaccharides (alginate, chitosan, xanthan gum and levan) in salt-free solutions was studied. Results showed that a higher polymer concentration increased the zero-rate viscosity and decreased the critical strain rate (Cross model fit) as well as increasing the elastic and viscous moduli. Those properties (zero-rate viscosity and critical strain rate) can be a suitable indicator of the effect of the Laponite(®) on the shear flow behavior for the different solutions. Specifically, the effect of the Laponite(®) predominates for solutions with large critical strain rate and low zero-rate viscosity, modifying significantly the previous parameters and even the yield stress (if existing). On the other hand, larger higher polymeric concentration hinders the formation of the platelet structure, and polymer entanglement becomes predominant. Furthermore, the addition of high concentrations of Laponite(®) increases the elastic nature, but without modifying the typical mechanical spectra for polymeric solutions. Finally, Laponite(®) was added to (previously crosslinked) gels of alginate and chitosan, obtaining different results depending on the material. These results highlight the possibility of predicting qualitatively the impact of the Laponite(®) on different polymeric solutions depending on the solutions properties. |
format | Online Article Text |
id | pubmed-8004235 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-80042352021-03-28 Steady and Oscillatory Shear Flow Behavior of Different Polysaccharides with Laponite(®) Blanco-López, Marcos González-Garcinuño, Álvaro Tabernero, Antonio Martín del Valle, Eva M. Polymers (Basel) Article The rheological behavior, in terms of steady and oscillatory shear flow, of Laponite(®) with different polysaccharides (alginate, chitosan, xanthan gum and levan) in salt-free solutions was studied. Results showed that a higher polymer concentration increased the zero-rate viscosity and decreased the critical strain rate (Cross model fit) as well as increasing the elastic and viscous moduli. Those properties (zero-rate viscosity and critical strain rate) can be a suitable indicator of the effect of the Laponite(®) on the shear flow behavior for the different solutions. Specifically, the effect of the Laponite(®) predominates for solutions with large critical strain rate and low zero-rate viscosity, modifying significantly the previous parameters and even the yield stress (if existing). On the other hand, larger higher polymeric concentration hinders the formation of the platelet structure, and polymer entanglement becomes predominant. Furthermore, the addition of high concentrations of Laponite(®) increases the elastic nature, but without modifying the typical mechanical spectra for polymeric solutions. Finally, Laponite(®) was added to (previously crosslinked) gels of alginate and chitosan, obtaining different results depending on the material. These results highlight the possibility of predicting qualitatively the impact of the Laponite(®) on different polymeric solutions depending on the solutions properties. MDPI 2021-03-22 /pmc/articles/PMC8004235/ /pubmed/33809920 http://dx.doi.org/10.3390/polym13060966 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Blanco-López, Marcos González-Garcinuño, Álvaro Tabernero, Antonio Martín del Valle, Eva M. Steady and Oscillatory Shear Flow Behavior of Different Polysaccharides with Laponite(®) |
title | Steady and Oscillatory Shear Flow Behavior of Different Polysaccharides with Laponite(®) |
title_full | Steady and Oscillatory Shear Flow Behavior of Different Polysaccharides with Laponite(®) |
title_fullStr | Steady and Oscillatory Shear Flow Behavior of Different Polysaccharides with Laponite(®) |
title_full_unstemmed | Steady and Oscillatory Shear Flow Behavior of Different Polysaccharides with Laponite(®) |
title_short | Steady and Oscillatory Shear Flow Behavior of Different Polysaccharides with Laponite(®) |
title_sort | steady and oscillatory shear flow behavior of different polysaccharides with laponite(®) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8004235/ https://www.ncbi.nlm.nih.gov/pubmed/33809920 http://dx.doi.org/10.3390/polym13060966 |
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