Table 2.
No. | NaDES | HBA | HBD | Molar ratio | Conditions |
---|---|---|---|---|---|
1 | Bet/LA | Betaine | D,L-Lactic acida | 1:2:2.5 | 50 °C, 1 h |
2 | Glu/LA | D-(+)-Glucose | D,L-Lactic acida | 1:5:6.2 | 65 °C, 2 h |
3 | Bet/Gly/Water | Betaine | Glycerol | 1:3:1 | 70 °C, 3 h |
4 | Pro/CA/Water | L-proline | Citric acid | 2:1:3 | 80 °C, 4 h |
5 | Pro/Gly | L-proline | Glycerol | 1:2 | 65 °C, 3 h |
Lactic acid is 80% aqueous solution, the composition of water is considered as it could participate in the hydrogen bonding of the NaDES.