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高等学校化学研究 ›› 2016, Vol. 32 ›› Issue (1): 100-105.doi: 10.1007/s40242-016-5297-1

• Articles • 上一篇    下一篇

Measurement and Prediction on the Surface Properties of Dimethyl Sulfoxide/Water Mixtures

LÜ Ping, ZHAO Guanjia, ZHANG Xiaolong, YIN Jianguo, BAO Junfeng   

  1. College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
  • 收稿日期:2015-07-22 修回日期:2015-10-23 出版日期:2016-02-01 发布日期:2015-11-13
  • 通讯作者: ZHAO Guanjia E-mail:xjtuthermo@foxmail.com
  • 基金资助:

    Supported by the Specialized Research Fund for the National Natural Science Foundation of China(Nos.51506140, 51306127) and the Research Funds from Taiyuan University of Technology, China.

Measurement and Prediction on the Surface Properties of Dimethyl Sulfoxide/Water Mixtures

LÜ Ping, ZHAO Guanjia, ZHANG Xiaolong, YIN Jianguo, BAO Junfeng   

  1. College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
  • Received:2015-07-22 Revised:2015-10-23 Online:2016-02-01 Published:2015-11-13
  • Contact: ZHAO Guanjia E-mail:xjtuthermo@foxmail.com
  • Supported by:

    Supported by the Specialized Research Fund for the National Natural Science Foundation of China(Nos.51506140, 51306127) and the Research Funds from Taiyuan University of Technology, China.

摘要：

Pendent drop method was adopted to measure the surface tension of dimethyl sulfoxide(DMSO)/water mixtures. A new pendent drop apparatus was built up and checked with water, and a good agreement of our data with literature could be found. With the new apparatus, the surface tensions of nine DMSO/water mixtures with mass fractions of water from 0.1 to 0.9 were investigated in a temperature range of 298-338 K. The expanded uncertainty for surface tension measurement was estimated to be 0.5% at a confidence level of 95%(k=2) in the whole temperature range. A thermodynamic-based relation was used to predict the surface properties of DMSO/water mixtures. Based on the relation and Gibbs adsorption theory, a prediction model was proposed for the calculation of surface relative excess and the thickness of the surface molecule layer.

关键词: Surface tension, Pendent drop, Dimethyl sulfoxide, Water

Abstract:

Pendent drop method was adopted to measure the surface tension of dimethyl sulfoxide(DMSO)/water mixtures. A new pendent drop apparatus was built up and checked with water, and a good agreement of our data with literature could be found. With the new apparatus, the surface tensions of nine DMSO/water mixtures with mass fractions of water from 0.1 to 0.9 were investigated in a temperature range of 298-338 K. The expanded uncertainty for surface tension measurement was estimated to be 0.5% at a confidence level of 95%(k=2) in the whole temperature range. A thermodynamic-based relation was used to predict the surface properties of DMSO/water mixtures. Based on the relation and Gibbs adsorption theory, a prediction model was proposed for the calculation of surface relative excess and the thickness of the surface molecule layer.

Key words: Surface tension, Pendent drop, Dimethyl sulfoxide, Water