基于自由体积理论的离子液体黏度模型

Viscosity Model For Ionic Liquid Based on the Free-Volume Theory

离子液体具有熔点低、不挥发、热稳定性好等优点,被视为新型绿色溶剂而得到广泛研究。本文在大量搜集已发表文献中离子液体黏度实验数据的基础上,对自由体积理论进行了修正,建立了离子液体黏度模型。应用该模型对29种离子液体黏度进行了计算,温度为273.15~373.15 K。对比计算值与实验数据,相对偏差绝对平均值在1.22%以内,最大偏差在3.91%以内。结果表明该模型可较好的预测离子液体黏度,为离子液体的进一步研究及相关的工程应用提供了基础数据。

Because of the low melting point, low vapor pressure and high thermal stability, ionic liquid （IL） is considered as the green solvents and has been significantly investigated during the past few years. In this work, a modified free-volume theory is proposed to establish a viscosity model that is used to obtain the values of 29 ILs in the temperate range of 273.15-373.15 K. Comparison the experimental data with the calculated values, the average absolute relative deviation （AARD） is less than 1.22%, the maximum deviation （MD） is less than 3.91%, indicating that the model is successful in correlating the viscosity of IL over wide ranges of temperature.