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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/18298

Title: Cellulose Amorphization by Swelling in Ionic Liquid/Water Mixtures: A Combined Macroscopic and Second-Harmonic Microscopy Study
Authors: Glas, Daan
Depuydt, Daphne
Binnemans, Koen
De Vos, Dirk E.
Ameloot, Rob
Issue Date: 2015
Citation: CHEMSUSCHEM, 8 (1), p. 82-86
Abstract: Amorphization of cellulose by swelling in ionic liquid (IL)/water mixtures at room temperature is a suitable alternative to the dissolution-precipitation pretreatment known to facilitate enzymatic digestion. When soaking microcrystalline cellulose in the IL 1-ethyl-3-methylimidazolium acetate containing 20 wt% water, the crystallinity of the cellulose sample is strongly reduced. As less than 4% of the cellulose dissolves in this mixture, this swelling method makes a precipitation step and subsequent energy-intensive IL purification redundant. Secondharmonic generation (SHG) microscopy is used as a structuresensitive technique for in situ monitoring of the changes in cellulose crystallinity. Combined optical and SHG observations confirm that in the pure IL complete dissolution takes place, while swelling without dissolution in the optimal IL/water mixture yields a solid cellulose with a significantly reduced crystallinity in a single step.
Notes: [Glas, Daan; De Vos, Dirk E.; Ameloot, Rob] Katholieke Univ Leuven, Dept Microbial & Mol Syst, Ctr Surface Chem & Catalysis, B-3001 Leuven, Belgium. [Paesen, Rik; Ameloot, Marcel] Hasselt Univ, Biomed Res Inst, B-3590 Diepenbeek, Belgium. [Depuydt, Daphne; Binnemans, Koen] Katholieke Univ Leuven, Dept Chem, Div Mol Design & Synth, B-3001 Leuven, Belgium.
URI: http://hdl.handle.net/1942/18298
DOI: 10.1002/cssc.201402776
ISI #: 000347541700009
ISSN: 1864-5631
Category: A1
Type: Journal Contribution
Validation: ecoom, 2016
Appears in Collections: Research publications

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