期刊
NEW JOURNAL OF CHEMISTRY
卷 44, 期 22, 页码 9493-9501出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nj01601b
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资金
- Natural Science Foundation of Hebei Province [B2019408018]
- National Natural Science Foundation of China [21773307]
- Fundamental Research Funds for the Universities in Hebei Province [JYQ201902]
- Program for the Top Young Talents of Higher Learning Institutions of Hebei Province [BJ2020047]
- Scientific Research Program of Hebei's Higher Education Institutions [ZD2019036]
We for the first time have found that PEG-based DESs could volatilize at room temperature and atmospheric pressure. The mass loss from long-term evaporation of PEG-based DESs at 298.15 K for 1000 min could reach as high as 30.5% mass loss, ca. 6 times that of short-term evaporation (5.1% mass loss). Generally, the vaporization enthalpy of PEG-based DESs is found to lie between that of common organic solvents and that of ionic liquids, while some PEG-based DESs could be more volatile than common organic solvents. The evaporation of PEG-based DESs could be ascribed to their volatile constituents; however, the evaporation rate of each constituent is found to be very different. This is the first discovery of the higher volatility of PEG-based DESs at room temperature and atmospheric pressure.
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