Extended dissolution studies of cellulose in imidazolium based ionic liquids
-
J\", ; urgen Vitz, ; Erdmenger, Tina; Haensch, Claudia; Schubert, Ulrich S.
- Abstract:
- Ionic liquids (ILs) have become advantageous solvents for the dissolution and homogeneous
processing of cellulose in recent years. However, despite significant efforts, only a few ILs are
known for their capability to efficiently dissolve cellulose. In order to overcome this limitation, we
screened a wide range of potentially suitable ILs. From our studies, some remarkable results were
obtained, for example, an odd–even effect was found for different alkyl side-chain lengths of the
imidazolium chlorides which could not be observed for the bromides. Furthermore,
1-ethyl-3-methylimidazolium diethyl phosphate was found to be best suitable for the dissolution of
cellulose; dissolution under microwave irradiation resulted in almost no color change. No
degradation of cellulose could be observed. In addition, 1-ethyl-3-methylimidazolium diethyl
phosphate has a low melting point which makes the viscosity of the cellulose solution lower and,
thus, easier to handle.
- Year:
- 2009
- Type of Publication:
- Article
- Journal:
- Green Chemistry
- Volume:
- 11
- Pages:
- 417 - 424