Associate Professor GALINA PAVLOVSKAYA galina.pavlovskaya@nottingham.ac.uk
Associate Professor
Associate Professor GALINA PAVLOVSKAYA galina.pavlovskaya@nottingham.ac.uk
Associate Professor
THOMAS MEERSMANN thomas.meersmann@nottingham.ac.uk
Professor of Translational Imaging
23Na multiple quantum filtered (MQF) rheo-NMR methods were applied to probe the molecular foundation for flow induced self-assembly in 0.5% κ-carrageenan fluid. This method is sensitive enough to utilize an endogenous sodium ion concentration of approximately 0.02%. Rheo-NMR experiments were conducted at different temperatures and shear rates to explore varying molecular dynamics of the biopolymer in the fluid under shear. The temperature in the rheo-NMR experiments was changes from 288 K to 313 K to capture transition of κ-carrageenan molecules from helices to coils. At each temperature, the fluid was also tested for flow and oscillatory shear behaviour using bulk rheometry methods. It was found that the 23Na MQF signals were observed for the 0.5% κ-carrageenan solution only under shear and when the fluid demonstrated yielding and/or shear-thinning behaviour. At temperatures of 303 K and above, no 23Na MQF signals were observed independent of the presence or absence of shear as the molecular phase transition to random coils occurs and the fluid becomes Newtonian.
Pavlovskaya, G. E., & Meersmann, T. (2023). A molecular–mechanical link in shear-induced self-assembly of a functionalized biopolymeric fluid. Soft Matter, 19(17), 3228-3237. https://doi.org/10.1039/d2sm01381a
Journal Article Type | Article |
---|---|
Acceptance Date | Mar 30, 2023 |
Online Publication Date | Apr 3, 2023 |
Publication Date | May 7, 2023 |
Deposit Date | Jun 16, 2023 |
Publicly Available Date | Jun 23, 2023 |
Journal | Soft Matter |
Print ISSN | 1744-683X |
Electronic ISSN | 1744-6848 |
Publisher | Royal Society of Chemistry |
Peer Reviewed | Peer Reviewed |
Volume | 19 |
Issue | 17 |
Pages | 3228-3237 |
DOI | https://doi.org/10.1039/d2sm01381a |
Public URL | https://nottingham-repository.worktribe.com/output/19993127 |
Publisher URL | https://pubs.rsc.org/en/content/articlelanding/2023/SM/D2SM01381A |
molecular–mechanical link in shear-induced self-assembly of a functionalized biopolymeric fluid
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