Cellulose composite membranes for nanofiltration of aprotic solvents
| Autor: | T. S. Anokhina, Alexey Volkov, V. Ya. Ignatenko, A. A. Yushkin, A. V. Kostyuk, Sergey Antonov, I. S. Makarov |
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| Rok vydání: | 2016 |
| Předmět: |
General Chemical Engineering
Energy Engineering and Power Technology 02 engineering and technology 010402 general chemistry 01 natural sciences Remazol Brilliant Blue R chemistry.chemical_compound Geochemistry and Petrology Polymer chemistry medicine Acetone Cellulose chemistry.chemical_classification Chemistry General Chemistry Polymer 021001 nanoscience & nanotechnology 0104 chemical sciences Solvent Fuel Technology Membrane Nanofiltration Swelling medicine.symptom 0210 nano-technology Nuclear chemistry |
| Zdroj: | Petroleum Chemistry. 56:1085-1092 |
| ISSN: | 1555-6239 0965-5441 |
| DOI: | 10.1134/s0965544116110025 |
| Popis: | Cellulose composite membranes have been fabricated by casting a cellulose solution in N-methylmorpholine oxide on a nonwoven polyester support. The membranes have been tested for nanofiltration of aprotic solvents. The solvent permeability has changed from 0.11 ± 0.02 to 2.5 ± 0.4 kg/(m2 h bar) in the following order: DMSO > NMP > DMFA > THF > acetone, which can be attributed to a decrease in viscosity of the fluids. The rejection of the anionic dyes Orange II (MW 350) and Remazol Brilliant Blue R (MW 626) has been found to range within 15–85% and 42–94%, respectively, on the solvent nature. Sorption experiments have revealed a noticeable difference between certain solvents in interaction with the membrane material: a lower degree of cellulose swelling in THF (37%) and a higher degree in DMSO (230%). In addition, it has been found that the rejection of solutes by the composite membranes correlates with the degree of cellulose swelling. A rejection of ≥90% has been achieved for Remazol Brilliant Blue R, which has the larger molecule, at a cellulose swelling ratio of 100% or higher. Thus, it has been concluded that polymer swelling leads to narrowing the porous structure of the cellulose layer of the composite membrane and, hence, improvement in separation parameters. |
| Databáze: | OpenAIRE |
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