线性多糖的动态光散射微流变学
DWS microrheology of a linear polysaccharide.
作者信息
Hemar Y, Pinder D N
机构信息
Institute of Food, Nutrition and Human Health, Massey University, Private Bag 11 222, Palmerston North, New Zealand.
出版信息
Biomacromolecules. 2006 Mar;7(3):674-6. doi: 10.1021/bm050566l.
Diffusing wave spectroscopy has been used to measure the rheological behavior of pullulan (M(w) = 1 x 10(5)) aqueous solutions up to concentration of 40 g/dL. It was found that these solutions were mainly viscous, with the loss modulus G'' higher than the elastic modulus G'. The plot of the specific viscosity eta(sp) as a function of pullulan concentration showed two critical concentrations c = 4 g/dL and c = 15 g/dL. For c < c, eta( sp) approximately c(1.25+/-0.05); for c < c < c, eta( sp) approximately c(2+/-0.05); and for c > c, eta( sp) approximately c(4.5+/-0.5). These results are in very good agreement with those reported in the literature.
扩散波谱已被用于测量浓度高达40 g/dL的支链淀粉（M(w)=1×10(5)）水溶液的流变行为。发现这些溶液主要呈现粘性，损耗模量G''高于弹性模量G'。比浓粘度η(sp) 作为支链淀粉浓度的函数曲线显示出两个临界浓度c = 4 g/dL和c = 15 g/dL。对于c < c，η(sp) 约为c(1.25±0.05)；对于c < c < c，η(sp) 约为c(2±0.05)；对于c > c，η(sp) 约为c(4.5±0.5)。这些结果与文献报道的结果非常吻合。
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