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Dissolution Capacity of Novel Cellulose Solvents Based on Triethyloctylammonium Chloride
Author(s) -
Achtel Christian,
Jedvert Kerstin,
Kosan Birgit,
Seoud Omar A. El,
Heinze Thomas
Publication year - 2017
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201700208
Subject(s) - cellulose , dissolution , microcrystalline cellulose , dissolving pulp , dimethylacetamide , solvent , chemistry , pulp (tooth) , ammonium chloride , polymer chemistry , chloride , rheology , chemical engineering , organic chemistry , materials science , composite material , medicine , pathology , engineering
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 (N 2228 Cl). Clear cellulose solutions are obtained with N 2228 Cl 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) N 2228 Cl 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.