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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 PAESEN, Rik Depuydt, Daphne Binnemans, Koen AMELOOT, Marcel De Vos, Dirk E. Ameloot, Rob |
Issue Date: | 2015 | Publisher: | WILEY-V C H VERLAG GMBH | Source: | 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. | Keywords: | biomass; cellulose; ionic liquids; spectroscopy; sustainable chemistry | Document URI: | http://hdl.handle.net/1942/18298 | ISSN: | 1864-5631 | e-ISSN: | 1864-564X | DOI: | 10.1002/cssc.201402776 | ISI #: | 000347541700009 | Rights: | © 2015 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2016 |
Appears in Collections: | Research publications |
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