表面张力
化学
共晶体系
氢键
丙酮
摩尔分数
无机化学
酒
化学工程
有机化学
分子
物理化学
热力学
物理
工程类
合金
作者
Yu Chen,Wenjun Chen,Li Fu,Yingze Yang,Yaqing Wang,Xiaohong Hu,Fangen Wang,Tiancheng Mu
标识
DOI:10.1021/acs.iecr.9b00867
摘要
Surface tension is a key physiochemical property for the application of deep eutectic solvents (DESs) in the field of interface and colloid. However, the surface tension of DESs has not been systematically studied. Here, a comprehensive investigation on the surface tension of 50 typical DESs was carried out. The effect of hydrogen-bonding donors (HBDs) and hydrogen-bonding acceptors (HBAs) on the surface tension was investigated. Furthermore, the surface tension of mixed systems of DESs with other solvents, water, water+salt (e.g., KCl), ethanol, acetone, isopropyl alcohol, and ethyl acetate (EtAc), was studied. It was found that both HBDs and HBAs had a significant influence on the surface tension of DESs. The presence of crystal water in the salt component of DESs would decrease the surface tension of DESs. Besides, the surface tension of DESs increased significantly when the water mole fraction was higher than 0.9, which was well consistent with the tendency of IR spectra. However, the surface tension of DESs decreased continuously with the increase of the mole ratio of other investigated solvents.
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