Abstract
Deep eutectic solvent (DES) has been projected as a possible alternative for toxic organic solvents and has gained increasing attention from scientific community as well as industries. The most beneficial aspect of DES is its tuneable properties. In the current work, highly stable novel ammonium-based ternary deep eutectic solvents (TDESs) were synthesized by combining hydrogen bond donor (HBD) and hydrogen bond acceptors (HBAs) at variable molar ratios. Ethyl ammonium chloride (EAC), and zinc (II) chloride (ZnCl2) were selected as the HBAs, whereas glycerol (Gly) was the HBD. Their thermophysical properties namely, melting point, degradation temperature, density, viscosity, acidity, miscibility, refractivity and electrical conductivity were measured respectively. Additionally, the correlation (Arrhenius or linear regression) between the physical properties as a function of temperature was also studied and presented. The results show an increase in electrical conductivity and decrease in pH, density, dynamic and kinematic viscosities of TDESs with increasing temperature.
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