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Developing a shear thinning non-Newtonian fluid to substitute blood is desirable in studies of biomedicine engineering since blood is a shear thinning non-Newtonian fluid that exhibits both viscous and elastic properties, and generally not available in large volume. The rheological properties of aqueous Xanthan gum with different concentrations and temperatures were studied in present paper. The results show that aqueous Xanthan gum is a non-Newtonian fluid which displays remarkable shear thinning behaviour and is a suitable blood analog fluid. There is a power law distribution relationship between shear stress and shear rate, and the higher the solution concentration is, the more strongly it displays shear thinning behaviours. Viscosity values of aqueous Xanthan gum increase with the solution temperature decrease or with the solution concentration increase in linearity. Moreover at the temperature of 37℃, aqueous Xanthan gum with concentration of 0.4‰ and 0.6‰ matches human blood best in rheological properties. According to the results, the viscosity expression varied with temperature and concentrition is obtained, and the stability of Xanthan gum solution is discussed.
Developing a shear thinning non-Newtonian fluid to substitute blood is desirable in studies of biomedicine engineering since blood is a shear thinning non-Newtonian fluid that exhibits both viscous and elastic properties, and generally not available in large volumes. The rheological properties of aqueous Xanthan gum with different concentrations and temperatures were studied in present paper. The results show that aqueous Xanthan gum is a non-Newtonian fluid which displays Suspension thinning behavior and is a suitable blood analog fluid. There is a power law distribution relationship between shear stress and shear rate, and the higher the solution concentration is, the more intense it display shear thinning behaviors. the more at the temperature the 37 ° C, aqueous solution of Xanthan gum increase with the solution temperature decrease or with the solution concentration increase in linearity. Xanthan gum with concentration of 0.4 ‰ and 0.6 ‰ matches human bloo d best in rheological properties. According to the results, the viscosity expression varied with temperature and concentrition is obtained, and the stability of Xanthan gum solution is discussed.