Measurement and Correlation of High-Pressure Densities and Atmospheric Viscosities of Ionic Liquids: 1-Butyl-1-methylpyrrolidinium Bis(trifluoromethylsulfonyl)imide), 1-Allyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide, 1-Ethyl-3-methylimidazoli
Measurement and Correlation of High-Pressure Densities and Atmospheric Viscosities of Ionic Liquids: 1-Butyl-1-methylpyrrolidinium Bis(trifluoromethylsulfonyl)imide), 1-Allyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide, 1-Ethyl-3-methylimidazoli
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离子液体高压密度和大气压粘度的测量和关联：1-丁基-1-甲基吡咯烷鎓双(三氟甲基磺酰基)亚胺)、1-烯丙基-3-甲基咪唑鎓双(三氟甲基磺酰基)亚胺、1-乙基-3-甲基咪唑
DOI：
10.1021/acs.jced.7b00773
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发表时间：
2018
影响因子：
--
通讯作者：
Jr.
中科院分区：
文献类型：
--
作者：
Yuya Hiraga;Saki Hagiwara;Yoshiyuki Sato;Richard L. Smith;Jr.
研究了四种离子液体[bmpyr][Tf2N](1-丁基-1-甲基吡咯烷双(三氟甲基磺酰基)亚胺)、[AMIM][Tf2N](1-烯丙基-3-甲基咪唑双(三氟甲基磺酰)亚胺)、[EMIM][TCB](1-乙基-3-甲基咪唑四氰硼酸盐)和[Hmim][TCB](1-己基-3-甲基咪唑四氰基硼酸酯)。高压密度的测量范围为293~373K，与−-Fulcher-Tammann方程关联的平均相对偏差在0.08%以内。密度数据与Tait方程的关联度可达0.02%ARD。根据Tait方程计算的等压膨胀系数随温度的升高而恒定或略有下降，这与离子液体通常报道的趋势一致。表中列出了ε*修正的Sanchez-Lacombe状态方程的参数，允许离子液体高压密度的关联在ARD小于0.08%的范围内。
Four ionic liquids, [bmpyr][Tf2N] (1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide), [amim][Tf2N] (1-allyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide), [emim][TCB] (1-ethyl-3-methylimidazolium tetracyanoborate), and [hmim][TCB] (1-hexyl-3-methylimidazolium tetracyanoborate), were studied. High-pressure densities were measured at pressures up to 200 MPa and at temperatures of 312−433 K. Densities and viscosities at atmospheric pressure were measured over a temperature range of 293 to 373 K, and average relative deviation (ARD) of correlation with Vogel–Fulcher–Tammann equation for viscosity were within 0.08%. Correlation of the density data with the Tait equation could be obtained to within 0.02% ARD. Isobaric expansivities calculated from the Tait equation were constant or decreased slightly with increasing temperature in accordance with trends commonly reported for ionic liquids. Parameters for the ε*-modified Sanchez–Lacombe equation of state are tabulated that allow correlation of the ionic-liquid high-pressure densities to within an ARD of less than 0.08%.