Potthast, Antje and Rosenau, Thomas and Buchner, Richard and Roeder, Thomas and Ebner, Gerald and Bruglachner, Hartmut and Sixta, Herbert and Kosma, Paul (2002) The cellulose solvent system N,N-dimethylacetamide/lithium chloride revisited: the effect of water on physicochemical properties and chemical stability. CELLULOSE, 9 (1). pp. 41-53. ISSN 0969-0239
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The water content in the binary system N,N-dimethylacetamide/lithium chloride (DMAc/LiCl), a common cellulose solvent, has been proven to be a crucial parameter. A quick determination of water content in DMAc based on the solvatochromism of a UV-active betain probe dye has been developed and validated. An analogous method, based on the solvatochromic fluorescence shift of Zelinskij's dye, which strongly depends on the solvent polarity, was established for water determination in DMAc containing LiCl. Precise physicochemical data of the system DMAc/LiCl, such as density, viscosity, and conductivity, have been obtained. The limiting solubility for LiCl in absolute DMAc is 8.46 wt%. As shown by light scattering experiments, water in DMAc/LiCl induces aggregation upon standing for longer periods of time, which is even more prominent for diluted solutions and those having a poor state of dissolution.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PARTICLES; cellulose solution; DMAc/LiCl; dynamic light scattering; hydrolysis; solubility; solvatochromism; water content |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > PD Dr. Richard Buchner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 08 Nov 2021 10:42 |
| Last Modified: | 08 Nov 2021 10:42 |
| URI: | https://pred.uni-regensburg.de/id/eprint/40493 |
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