Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
EFFECT OF THE CONCENTRATION AND TEMPERATURE ON THE RHEOLOGICAL PROPERTIES OF DIUTAN GUM
Submission Author:
Guilherme Pereira Mota , RJ
Co-Authors:
Guilherme Pereira Mota, Roberto Pereira
Presenter: Guilherme Pereira Mota
doi://10.26678/ABCM.COBEM2019.COB2019-1145
Abstract
Diutan Gum is a polysaccharide obtained through the fermentation of bacteria of the genus Sphingomonas, being thus classified as a biopolymer. Diutan gum has several applications of industrial interest, especially in oil industry. In the present article, aqueous solutions of diutan gum (2000, 6000 and 8000 ppm) were tested on a rotating rheometer, determining various rheological properties, especially shear viscosity, obtained through flow curves at 40°C and 60°C. Stationary and dynamic tests were performed to investigate the behavior of diutan gum. Diutan gum showed a pseudoplastic behavior on viscosity curves and the concentration modify apparent viscosity values. All the oscillatory tests were performed inside the linear viscoelastic range. The elastic component was predominant upon the viscous portion in the range investigated. In creep tests, diutan gum presented elastic recovery for all the investigated cases, showing viscoelastic behavior.
Keywords
biopolymer, diutan gum, rheological properties
