Consequently, an evolution of the structure of the liquid as the ChCl:LA increases is observed, achieving, a better mixed, more homogeneous structure in the highest ratios (1:5, 1:10). This results in a higher contact area between HBD and HBA and a better availability of the main interacting moieties (namely Cl and OH) that would in principle allow a better interaction with lignin, in line with the experimental observations.