Preparation and characterization of physicochemical properties and application of novel ternary deep eutectic solvents

In this work preparation of 23 new three-component DESs is described. Based on their stability 15 of them were finally selected and subjected to further investigation. DESs are eco-friendly solvents and due to their involving in treatment of lignocellulosic materials, some properties related to this topic were determined in detail, among them density, electrical conductivity and viscosity. The potential of the selected 15 DESs in delignification of unbleached pulp was examined. It was manifested that the addition of a third component to classical two-component DESs allow to purposefully control density and viscosity of the ternary DESs and thus upgrade pulp delignification efficiency. The addition of an alcohol leads to a decrease of both DES density and viscosity. Contrary, the addition of an organic acid causes their increase. Moreover, DES properties can be purposefully governed via changing the structure and complexity of the chain of a given acid.