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Dissolution capacity of novel cellulose solvents based on triethyloctylammonium chloride
Friedrich Schiller University of Jena, Germany.
RISE - Research Institutes of Sweden, Materials and Production, IVF. Friedrich Schiller University of Jena, Germany.ORCID iD: 0000-0003-2893-8554
TITK Thuringian Institute of Textile and Plastics Research, Germany.
University of São Paulo, Brazil.
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2017 (English)In: Macromolecular Chemistry and Physics, ISSN 1022-1352, E-ISSN 1521-3935, Vol. 218, no 21, article id 1700208Article in journal (Refereed) Published
Abstract [en]

Dissolution of cellulose from various sources (microcrystalline cellulose and different dissolving grade pulp fibers) is investigated in solvent systems based on triethyl(n-octyl)ammonium chloride (N2228Cl). Clear cellulose solutions are obtained with N2228Cl in a variety of solvents, e.g., dimethyl sulfoxide, N,N-dimethylacetamide, and acetone. It is possible to prepare clear cellulose solutions from pulp fibers with concentrations up to 15 wt%. However, it is found that the cellulose is degraded, especially when neat (i.e., molten) N2228Cl is used as a solvent. The present work includes comprehensive rheological characterization of the cellulose solutions, both with shear and extensional rheology. In most cases, the viscosity values are low (complex viscosities below 100 Pa s for 5–10 wt% dissolved cellulose), and the solutions show more Newtonian than viscoelastic behavior. 

Place, publisher, year, edition, pages
2017. Vol. 218, no 21, article id 1700208
Keywords [en]
cellulose dissolution, degradation, quaternary ammonium salts, rheology
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:ri:diva-31208DOI: 10.1002/macp.201700208Scopus ID: 2-s2.0-85032669839OAI: oai:DiVA.org:ri-31208DiVA, id: diva2:1137012
Available from: 2017-08-30 Created: 2017-08-30 Last updated: 2019-08-15Bibliographically approved

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Jedvert, Kerstin

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