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The Influence of Inorganic Cations Addition on Rheology of Aqueous Diutan Gum Solutions

Name: The Influence of Inorganic Cations Addition on Rheology of Aqueous Diutan Gum Solutions
Keywords: Viscosity, Power-Law Model, Exponential Model, Diutan Gum, Viscoelasticity, Rheological Tests, Cox-Merz Rule

descriptionPublicationkeyboard_double_arrow_right Article , Other literature type 01 Jan 2019 English Publisher:Alkhaer PublicationsJournal:International Journal of Sciences, volume 8, pages 117-134 (issn: 2410-4477, eissn: 2305-3925,

Authors: Guilherme Mota; João Crisósthomo de Queiroz Neto; Ithamar Ribeiro Rangel; Roberto Guimarães Pereira;

doi: 10.18483/ijsci.2077 , 10.5281/zenodo.3350730 , 10.5281/zenodo.3350731

The Influence of Inorganic Cations Addition on Rheology of Aqueous Diutan Gum Solutions

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Abstract

The Influence of cations addition (Na+, Ca2+ and Mg2+) on rheology of aqueous diutan gum solutions was investigated at the temperatures of 200C, 400C and 600C. It was used a solution of diutan gum (4300 ppm) in deionized water with 40000 ppm of NaCl. In this solution, inorganic cations (300 ppm of calcium; 300 ppm of magnesium and 300 ppm of calcium plus 300 ppm of magnesium) were added. Steady shear, creep-recovery and oscillation tests were performed. All aqueous diutan gum solutions showed a pseudoplastic and viscoelastic behavior. The addition of calcium and magnesium cations leads to a gel behavior of the solutions for all cases in the angular velocity range investigated, as demonstrated by mechanical spectra. The recovery rate in the case of aqueous diutan gum solutions with calcium and magnesium is much higher than the recovery rate in the case of aqueous diutan gum solutions with NaCl.Read Complete Article at ijSciences: V82019052077 AND DOI: http://dx.doi.org/10.18483/ijSci.2077

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Universidade Federal Fluminense
Brazil

Keywords

Viscosity, Power-Law Model, Exponential Model, Diutan Gum, Viscoelasticity, Rheological Tests, Cox-Merz Rule

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