Salts Abbreviation HBD Molar ratio Symbol Choline Chloride ChCl TEG 1:3 DES1[12] Choline Chloride ChCl DEG 1:3 DES2 Choline Chloride ChCl EG 1:3 DES3 Choline Chloride ChCl GL 1:3 DES4

Table 1: Composition and abbreviation of DESs used in this research.