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Vaporization enthalpy, long-term evaporation and evaporation mechanism of polyethylene glycol-based deep eutectic solvents

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Abstract

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.

Graphical abstract: Vaporization enthalpy, long-term evaporation and evaporation mechanism of polyethylene glycol-based deep eutectic solvents

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Article information


Submitted
31 Mar 2020
Accepted
14 May 2020
First published
15 May 2020

New J. Chem., 2020, Advance Article
Article type
Paper

Vaporization enthalpy, long-term evaporation and evaporation mechanism of polyethylene glycol-based deep eutectic solvents

Y. Chen, Q. Wang, Z. Liu, Z. Li, W. Chen, L. Zhou, J. Qin, Y. Meng and T. Mu, New J. Chem., 2020, Advance Article , DOI: 10.1039/D0NJ01601B

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