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.
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Supported by the Specialized Research Fund for the National Natural Science Foundation of China(Nos.51506140, 51306127) and the Research Funds form Taiyuan University of Technology, China.
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Lü, P., Zhao, G., Zhang, X. et al. Measurement and prediction on the surface properties of dimethyl sulfoxide/water mixtures. Chem. Res. Chin. Univ. 32, 100–105 (2016). https://doi.org/10.1007/s40242-016-5297-1
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DOI: https://doi.org/10.1007/s40242-016-5297-1