Rheological Properties of Aqueous Dextran Solution

doi:10.7506/spkx1002-6630-200907015

FOOD SCIENCE ›› 2009, Vol. 30 ›› Issue (7): 68-71.doi: 10.7506/spkx1002-6630-200907015

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Rheological Properties of Aqueous Dextran Solution

XU Xue-lin1 LI Hang-quan2

(1.National Institute of Metrology, Beijing 100013, China 2. College of Materials Science and Engineering, Beijing University of
Chemical Technology, Beijing 100029, China)

Received:2008-06-05 Revised:2008-08-29 Online:2009-04-01 Published:2010-12-29
Contact: XU Xue-lin1 E-mail:xuxl@nim.ac.cn

Abstract

Abstract:

The rheological properties of five dextrans with various molecular weights in aqueous solution were investigated as well as the effects of molecular weight (Mw), concentration of solution and temperature. Results indicated that the solution with a molecular weight of 531000 and a concentration of 30% shows pseudo-plastic property, but most aqueous dextran solutions are Newtonian fluid. The viscosity decreases with the increase of shear rate. When the concentration is lower than 1%, the dextran solutions show unique rheological properties, i.e., with the increase of shear rate, the viscosity of solution firstly decreases and then increases.

Key words: dextran, aqueous solution, rheology, Newtonian fluid, pseudo-plastic fluid

CLC Number:

XU Xue-lin1 LI Hang-quan2. Rheological Properties of Aqueous Dextran Solution[J]. FOOD SCIENCE, 2009, 30(7): 68-71.

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Rheological Properties of Aqueous Dextran Solution

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