In this study, fructose-based natural deep eutectic solvent of choline chloride (2-hydroxyethyl- trimethylammonium chloride) were synthesized at different molar ratios. The physicochemical properties such as density, apparent viscosity, pH, conductivity, and microwave heating response were measured and analyzed as the amount of added water was varied (0-30 w/w%). The analysis of these properties revealed that the viscosity decreases as the water content increases, making it more suitable for industrial applications as solvents. It was also shown that both pH and density remained constant in the different water contents analyzed. However, a strong interaction with microwave energy was found in all cases. As the amount of added water increases, the thermal stability of the solvent under microwave irradiation also increases. The studied choline chloride:fructose NADES have many desirable properties to be applied to the industrial processing of food products, cosmetics, pharmaceuticals, and other extraction processes. Further application of these solvents will be explored in the future.

Effects of water on the physicochemical properties of fructose-based natural deep eutectic solvents

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