Abstract
Introduction. Deep eutectic solvents (DESs) are easy to synthesize, exhibit high purity, and are, importantly, cost-effective. Recent studies have shown that they are biodegradable, environmentally friendly, and hydrophobic. DESs are typically described as mixtures of a hydrogen bond acceptor (HBA) and a hydrogen bond donor (HBD), which, when combined, form a eutectic mixture with a melting point lower than that of its individual components. The purpose of the work: is to synthesize new DESs based on betaine and examine their physicochemical properties. Results and discussions: the optimal synthesis ratio for these DESs was determined. Their pH values were found to be 6.85 and 7.0, respectively. The density and viscosity were measured, and the functional groups and interactions were analyzed through IR spectroscopy. Conclusion: It was demonstrated that the proposed deep eutectic solvents, due to their unique structural properties, can be utilized in various industrial applications due to their optimal chemical and physical characteristics.