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Fluids 2019, 4(1), 22; https://doi.org/10.3390/fluids4010022

A Comparison of the Effect of Temperature on the Rheological Properties of Diutan and Rhamsan Gum Aqueous Solutions

Departamento de Ingeniería Química, Facultad de Química, Universidad de Sevilla, C/P. García González, 1, E41012 Sevilla, Spain
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Received: 15 December 2018 / Revised: 13 January 2019 / Accepted: 19 January 2019 / Published: 1 February 2019
(This article belongs to the Special Issue Advances in Experimental and Computational Rheology)
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Abstract

The rheological properties exhibited by gums make its use in applications interesting, such as foods, cosmetics, enhanced oil recovery, or constructions materials. Regardless of application field, the effect of temperature on these properties is of great importance, since these properties can be modified and cause the gum not to be useful for those conditions. Diutan and rhamsan gums are biopolymers, belonging to the sphingans, with similar structures which differ in the substituents of their side chains. It is known that both gums exhibit suitable viscoelastic properties and flow behavior when used as a stabilizer, gelling agent, or thickener. Both gums are widely used in food industry, personal care products, construction materials, oil operations, etc. For this reason, to know the effect of the temperature on their rheological properties is very helpful. For this purpose, small amplitude oscillatory shear measurements and flow curves, as a function of the temperature from 10 °C to 60 °C, have been performed, and the results obtained for both gums compared. The obtained results provide interesting information from an industrial point of view, since they reveal that the rheological properties remained almost unaltered in the temperature range assessed with diutan gum aqueous solutions, being slightly more viscous and viscoelastic than rhamsan gum solutions. View Full-Text
Keywords: diutan gum; rhamsan gum; rheology; viscoelasticity; flow properties; weak gel diutan gum; rhamsan gum; rheology; viscoelasticity; flow properties; weak gel
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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García González, M.C.; Cely García, M.S.; Muñoz García, J.; Alfaro-Rodriguez, M.-C. A Comparison of the Effect of Temperature on the Rheological Properties of Diutan and Rhamsan Gum Aqueous Solutions. Fluids 2019, 4, 22.

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