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Issue 3, 2009
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Extended dissolution studies of cellulose in imidazolium based ionic liquids

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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.

Graphical abstract: Extended dissolution studies of cellulose in imidazolium based ionic liquids

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Publication details

The article was received on 14 Oct 2008, accepted on 05 Jan 2009 and first published on 23 Jan 2009


Article type: Paper
DOI: 10.1039/B818061J
Citation: Green Chem., 2009,11, 417-424
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    Extended dissolution studies of cellulose in imidazolium based ionic liquids

    J. Vitz, T. Erdmenger, C. Haensch and U. S. Schubert, Green Chem., 2009, 11, 417
    DOI: 10.1039/B818061J

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