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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (8): 655-659.    下一篇

研究论文

利用标准加入法研究离子液体EMIBF4的密度和表面张力

杨家振*,1, 李景斌1,3, 佟静1,2, 洪梅1   

  1. (1辽宁大学化学院 沈阳 110036)
    (2中国科学院青海盐湖研究所 西宁 810008)
    (3中国科学院研究生院 北京100039)
  • 投稿日期:2006-10-30 修回日期:2006-12-07 发布日期:2007-04-28
  • 通讯作者: 杨家振

Study on the Density and Surface Tension of Ionic Liquid EMIBF4 in Terms of Standard Addition Method

YANG Jia-Zhen*,1; LI Jing-Bin1,3; TONG Jing1,2; HONG Mei1   

  1. (1 Department of Chemistry, Liaoning University, Shenyang 110036)
    (2 The Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008)
    (3 The Graduate School of the Chinese Academy of Sciences, Beijing 100039)
  • Received:2006-10-30 Revised:2006-12-07 Published:2007-04-28
  • Contact: YANG Jia-Zhen

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在278.15～338.15 K温度范围内, 分别用Anton Paar密度计和最大气泡法测定了含有不同微量水的离子液体EMIBF4 (1-ethyl-3-methylimidazolium tetrafluoroborate)的密度和表面张力, 讨论了微量水对这些性质的影响, 进而用标准加入法确定了无水离子液体EMIBF4的密度和表面张力. 借助Glasser理论和空隙模型讨论了EMIBF4的热力学性质. 用空隙模型计算的离子液体热膨胀系数与实验测定值较好一致, 说明空隙模型具有合理性.

关键词: 离子液体, 标准加入法, 密度, 表面张力

In terms of standard addition method, the density and surface tension of ionic liquid EMIBF4 (1-ethyl-3-methylimidazolium tetrafluoroborate) were measured in the temperature range of 278.15 to 338.15 K. The properties of volume and surface for pure EMIBF4 were discussed in terms of the interstice model and Glasser’s theory. The thermal expansion coefficient α＝6.23×10－4 K－1 calculated using interstice model is closed to experimental α＝5.86×10－4 K－1. This result means that the interstice model is reasonable.

Key words: ionic liquid, standard addition method, density, surface tension