Validation of temperature-controlled rheo-MRI measurements in a submillimeter-gap Couette geometry.
Magn Reson Chem
; 60(7): 606-614, 2022 07.
Article
em En
| MEDLINE
| ID: mdl-33788305
ABSTRACT
A temperature-controlled submillimeter-gap (500 µm) rheo-magnetic resonance imaging (MRI) Couette cell has been developed to measure confined flow of soft structured materials under controlled temperature. The proposed setup enables performing rheo-MRI measurements using (i) a spatially uniform temperature control over the range 15°C to 40°C and (ii) a high spatial resolution up to 10 µm, as a consequence of the improved mechanical stability of the in-house developed rotating elements. Here, we demonstrate the performance of the cell for the rheo-MRI velocimetry study of a thixotropic fat crystal dispersion, a complex fluid commonly used in food manufacturing. The submillimeter-gap geometry and variable temperature capability of the cell enable observing the effects of shear- and temperature-induced fat recrystallization on both wall slip and shear banding under strongly confined flow. Our improved rheo-MRI setup opens new perspectives for the fundamental study of strongly confined flow, cooperative effects, and the underlying interparticle interactions and for ultimately aiding optimization of products involved in spreading/extrusion, such as cosmetics and foods.
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MEDLINE
Assunto principal:
Imageamento por Ressonância Magnética
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article