Effect of temperature on the viscosities and the volumetric properties of the binary mixtures of the ionic liquids [bmim][PF6] and [bmim][CF3SO3]
Effect of temperature on the viscosities and the volumetric properties of the binary mixtures of the ionic liquids [bmim][PF6] and [bmim][CF3SO3]
复制标题
DOI：
10.1016/j.molliq.2017.08.019
复制
发表时间：
2017-10
影响因子：
6
通讯作者：
M. Páez;Yair A Vega;C. M. Romero
中科院分区：
文献类型：
--
作者：
M. Páez;Yair A Vega;C. M. Romero
在这项工作中，研究了温度对具有共同离子 [bmim][PF6] 和 [bmim][CF3SO3] 的两种离子液体的二元混合物的体积性质和粘度的影响。在 293.15 至 328.15 K 的温度范围内，以 5 K 为间隔，测量溶液的实验密度和粘度作为摩尔分数的函数。根据实验数据计算过量摩尔体积、无限稀释时的部分摩尔体积和过量粘度。将过量摩尔体积拟合为 Redlich Kister 多项式表达式。通过最小二乘法调整粘度数据，得到粘度B系数和B对温度的一阶导数。从分子相互作用的角度讨论了温度对粘度行为和体积性质的影响。
In this work a study of the effect of temperature on the volumetric properties and viscosities of the binary mixtures of two ionic liquids with a common ion [bmim][PF6] and [bmim][CF3SO3] is presented. Experimental densities and viscosities of the solutions were measured as a function of mole fraction in the temperature range from 293.15 to 328.15 K at intervals of 5 K.From experimental data the excess molar volumes, the partial molar volumes at infinite dilution and the excess viscosities were calculated. The excess molar volumes were fitted to a Redlich Kister polynomial expression. The viscosity data were adjusted by a least-squares method to obtain the viscosityBcoefficient and the first derivative of B with respect to temperature.The influence of temperature on the behavior of viscosity and the volumetric properties is discussed in terms of molecular interactions.