Key Laboratory for Colloid and Interface Chemistry of Education Ministry, Shandong University, Jinan 250100, PR China.
Carbohydr Polym. 2012 Oct 15;90(3):1330-6. doi: 10.1016/j.carbpol.2012.07.001. Epub 2012 Jul 10.
Rheological properties of aqueous solution containing xanthan gum (XG) and cationic cellulose JR400 were investigated at different composition ratio, shear rate, pH and electrolyte concentrations. It was found that the mixing of XG and JR400 can induce a viscosity-increasing effect for the mixed solution. As the concentration fraction (f(JR)) of JR400 in the mixed solution increases from 0 to 0.40 with the total polymer concentration (c(t)) of 1%, the solution transforms from an elastic fluid into a viscoelastic one, while as f(JR) decreases from 1 to 0.78, the solution transforms from a viscous fluid into a viscoelastic one. At pH 5-10, both the viscosity and elasticity of XG/JR400 mixture (f(JR)=0.15) are independent of pH and the viscosity-increasing effect is obvious. Outside this pH range, the viscosity, elasticity and viscosity-increasing effect of the mixture decrease. The increase of added NaCl concentration and shear rate can induce the decrease of viscosity, elasticity and viscosity-increasing effect of the XG/JR400 mixture.
研究了含有黄原胶（XG）和阳离子纤维素 JR400 的水溶液在不同组成比、剪切率、pH 值和电解质浓度下的流变性能。结果表明，XG 和 JR400 的混合可以诱导混合溶液的增粘效应。随着混合溶液中 JR400 的浓度分数（f（JR））从 0 增加到 0.40，总聚合物浓度（c（t））为 1%，溶液从弹性流体转变为粘弹性流体，而当 f（JR）从 1 降低到 0.78 时，溶液从粘性流体转变为粘弹性流体。在 pH 值为 5-10 时，XG/JR400 混合物（f（JR）=0.15）的粘度和弹性均不受 pH 值的影响，增粘效果明显。在该 pH 值范围之外，混合物的粘度、弹性和增粘效果降低。增加添加的 NaCl 浓度和剪切率会导致 XG/JR400 混合物的粘度、弹性和增粘效果降低。
