[bmim][BF_4]、[bmim][PF_6]离子液体及其与DMF二元体系在293.15～338.15K下的粘度

为获得离子液体与有机物物理性质的数据,常压下,293.15～338.15 K温度范围内,分别测定了1-丁基-3-甲基咪唑四氟硼酸盐（bmim]BF4]）、1-丁基-3-甲基咪唑六氟磷酸盐（bmim]PF6]）2种咪唑类离子液体以及它们和N,N-二甲基甲酰胺（DMF）构成的2个二元体系的粘度,采用Vogel-Tamman-Fulcher（VFT）方程和Arrhenius-like方程对所测粘度数据进行关联。结果表明,同一温度下,3种纯溶液粘度大小顺序依次为：DMF〈bmim]BF4]〈bmim]PF6]。bmim]BF4]、bmim]PF6]离子液体及其与DMF构成的二元体系的粘度均随着温度的升高和DMF摩尔分率的增加而降低。实验条件下,DMF＋bmim]BF4]和DMF＋bmim]PF6]二元体系的粘度变化范围分别为1.26～125.5 MPa·s和1.11～165.7 MPa·s。VFT方程对于DMF-bmim]BF4]与DMF-bmim]PF6]体系的关联结果比Arrhenius-like方程较好,其总平均绝对误差、总平均相对误差、以及总平均标准方差分别为0.561 9 MPa·s和0.918 6 MPa·s、0.026 8 MPa·s和0.020 9 MPa·s、0.725 5 MPa·s和1.125 1 MPa·s。

The Viscosities of [bmim][BF_4] and [bmim][PF_6] Ionic Liquids and Their Binary Systems with N,N-Dimethylformamide

In order to obtain the data of the physical properties for ionic liquids and organic,the viscosities of two imidazolium-based ionic liquids,1-butyl-3-methylimidazole tetrafluoroborate() and 1-butyl-3-methylimidazolium hexafluorophosphate(),and their binaries with N,N-dimethylformamide(DMF) at the temperature range from 293.15 K to 343.15 K in atmospheric pressure were determined,respectively,and the viscosity datas were correlated by the Vogel-Tamman-Fulcher(VFT) and Arrhenius-like equation.The results show...