Measurement and prediction on the surface properties of dimethyl sulfoxide/water mixtures

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• 作者：Ping Lü ; Guanjia Zhao ; Xiaolong Zhang…
• 关键词：Surface tension ; Pendent drop ; Dimethyl sulfoxide ; Water
• 刊名：Chemical Research in Chinese Universities
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：32
• 期：1
• 页码：100-105
• 全文大小：432 KB
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• 作者单位：Ping Lü (1)
  Guanjia Zhao (1)
  Xiaolong Zhang (1)
  Jianguo Yin (1)
  Junfeng Bao (1)
  
  1. College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
  
• 刊物主题：Chemistry/Food Science, general; Analytical Chemistry; Inorganic Chemistry; Organic Chemistry; Physical Chemistry;
• 出版者：Springer Berlin Heidelberg
• ISSN：2210-3171

文摘

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. Keywords Surface tension Pendent drop Dimethyl sulfoxide Water