Affordable Access

deepdyve-link
Publisher Website

Thermally Triggered Phase Separation of Organic Electrolyte-Cellulose Solutions.

Authors
  • de Oliveira, Heitor F N1
  • Clough, Matthew T1
  • Rinaldi, Roberto2
  • 1 Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim-an-der-Ruhr, Germany. , (Germany)
  • 2 Department of Chemical Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK.
Type
Published Article
Journal
ChemSusChem
Publisher
Wiley (John Wiley & Sons)
Publication Date
Dec 08, 2016
Volume
9
Issue
23
Pages
3324–3329
Identifiers
DOI: 10.1002/cssc.201601108
PMID: 27783453
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Organic electrolyte solutions (OES)-binary mixtures of an ionic liquid (IL) with a neutral polar aprotic co-solvent-are being recognized as excellent candidate solvents for the dissolution, derivatization, and sustainable processing of cellulose. These solutions exhibit the beneficially combined properties of rapid-to-instantaneous cellulose dissolution, raised thermal stability, and reduced viscosity, compared to cellulose solutions in the parent ILs. Herein, we report the reversible, thermally triggered phase separation of cellulose solutions in 1-ethyl-3-methylimidazolium acetate with 1,3-dimethyl-2-imidazolidinone. In these solutions, cellulose drives the process of phase separation, resulting in a lower, IL-rich layer in which the biopolymer is segregated. In turn, the upper phase is enriched in the neutral co-solvent. We show that the temperature of phase separation can be fine-tuned by modification of mole fractions of IL, co-solvent, and cellulose. This finding holds promise for the design of strategies for separation and solvent recycling in cellulose chemistry. © 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Report this publication

Statistics

Seen <100 times