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| Study on Surface Tension of Caprolactam - tetrabutylammonium Fluoride Ionic Liquid |
| YANG Kun1，ZHANG Peng1，LIU Li-bin2，YANG Di3，GUO Qing1，WANG Sheng1，DUAN Er-hong1 |
| 1.School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China; 2.School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100000, China; 3.School of Chemical and Pharmaceutical Engineering, Beijing University of Chemical Technology, Beijing 100000, China |
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Abstract Ionic liquid is one of the most important potential green solvents in 21st century because of its many advantages, such as good dissolving capacity and physical and chemical properties, high boiling point, less volatile, and without sencondary pollutions. Different concentrations of caprolactam - tetrabutylammonium fluoride ionic liquid aqueous solutions were prepared, the surface tensionse of which were measured. The results showed that the surface tensions of the ionic liquids decreased with increase of temperature and the ionic liquid concentration;the surface tension of the pure ionic liquid was smaller than that of water at certain ionic liquid concentration.
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