An Experimental Investigation on Rheological Properties of Aqueous Xanthan Gum as a Blood Analog Fluid  

作　　者：ZHANG Gen-guang ZHANG Ming-yuan YANG Wan-ying ZHU Xian-ran 

机构地区：[1]Northwest Sci-Tech University of Agriculture and Forestry, Yangling,Shanxi ,712100, China [2]Xi＇an Jiaotong University, Xi＇an, 710049, China

出　　处：《Chinese Journal of Biomedical Engineering(English Edition)》2006年第3期121-126,共6页中国生物医学工程学报（英文版）

摘　　要：Developing a shear thinning non-Newtonian fluid to substitute blood is desirable in studies of biomedicine engineering since blood is a shear thinning nonNewtonian 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 resuits 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%e and 0.6%0 matches human blood best in rheological properties. According to the resuits, 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 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.

关 键 词：Xanthan gum Rheological properties Blood analog fluid Shear thinning 

分 类 号：R55[医药卫生—血液循环系统疾病]