Thermophysical properties of glycerol and polyethylene glycol (PEG 600) based DES

Singh, Amarpreet and Walvekar, Rashmi and Khalid, Mohammad * and Wong, Wai Yin and Gupta, T.C.S.M (2018) Thermophysical properties of glycerol and polyethylene glycol (PEG 600) based DES. Journal of Molecular Liquids, 252. pp. 439-444. ISSN 0167-7322

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Official URL: http://doi.org/10.1016/j.molliq.2017.10.030

Abstract

In this study, the Deep Eutectic Solvent (DES) is prepared based on glycerol and polyethylene glycol 600 (PEG) as hydrogen bond donor and choline chloride (ChCl) as hydrogen bond acceptor. The glycerol based DESs were formed with ratio of 1:2, 1:3, 1:4 and 1:5 whereas three-component DESs of ChCl, PEG and glycerol were synthesized with ratio 1:3:2, 1:4:2 and 1:5:2. The DESs were subjected to DSC, Karl Fishcer, thermal conductivity, viscosity and density testing. The melting temperature (Tm) for PEG based DESs were found to in the region of 18 °C. The moisture content in DESs were identified through Karl Fishcer testing was found to be < 1% which is desired when synthesizing a DES. The thermal conductivity of glycerol based DESs decreases with respect to pure glycerol whereas for PEG based DESs shows positive enhancement of thermal conductivity at temperatures below 60 °C. The viscosity of glycerol DESs decreases with increasing temperature and the value of PEG DESs' viscosities was found to be higher than the pure PEG. All the DES samples have linear decrease across a temperature range with highest density achieved at 1.2155 g/cm3 with temperature of 25 °C for molar ratio of ChCl to glycerol of 1:4 (DES 4).

Item Type: Article
Uncontrolled Keywords: deep eutectic solvent; ionic liquid; glycerol; polyethylene glycol; viscosity
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
Divisions: Others > Non Sunway Academics
Sunway University > School of Science and Technology > Research Centre for Nano-Materials and Energy Technology
Depositing User: Dr Janaki Sinnasamy
Related URLs:
Date Deposited: 10 Dec 2018 04:07
Last Modified: 25 Apr 2019 07:46
URI: http://eprints.sunway.edu.my/id/eprint/968

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