Volume 97, №6
CREATION OF ULTRAFILTRATION HOLLOW FIBER MEMBRANES BASED ON POLYPHENYLENE SULFONE WITH DIFFERENT CHEMICAL STRUCTURE OF END GROUPS
To obtain high-performance ultrafi ltration hollow fi ber membranes, polyphenylene sulfones (PPSF) with diff erent chemical structure of end groups were synthesized. The synthesis of PPSF was carried out in dimethylacetamide at diff erent ratios of 4,4′-dihydroxydiphenyl and 4,4-dichlorodiphenylsulfone monomers. Samples with a predominant content of hydroxyl and chlorine end groups were studied using NMR and GPC methods. For the synthesized polymers, the hydrophilicity of the materials was studied, and phase diagrams were constructed where N-methyl-2-pyrrolidone (NMP) was used as a solvent and polyethylene glycol with an average molecular weight of 400 g/mol (PEG-400) as a porogen. Using the dry-wet spinning method, hollow fi ber membranes with an average pore diameter of 11–13 nm and fi nger-shaped macrovoids in the substrate layer were obtained from PPSF/NMP/PEG-400 (20/60/20 wt.%) spinning solutions. An increase in the share of –OH end groups increases the hydrophilicity of the polymer. This, in turn, made it possible to obtain hollow fi ber membranes based on PPSF–OH with water permeability of 42 L/(m2 ·h), which is 1.8 times greater than the permeability of the PPSF–Cl membrane. Both membranes demonstrate a retention coeffi cient of 94.7–97.3% according to Blue Dextran calibrant (Mw = 70,000 g∙mole–1).
To obtain high-performance ultrafi ltration hollow fi ber membranes, polyphenylene sulfones (PPSF) with diff erent chemical structure of end groups were synthesized. The synthesis of PPSF was carried out in dimethylacetamide at diff erent ratios of 4,4′-dihydroxydiphenyl and 4,4-dichlorodiphenylsulfone monomers. Samples with a predominant content of hydroxyl and chlorine end groups were studied using NMR and GPC methods. For the synthesized polymers, the hydrophilicity of the materials was studied, and phase diagrams were constructed where N-methyl-2-pyrrolidone (NMP) was used as a solvent and polyethylene glycol with an average molecular weight of 400 g/mol (PEG-400) as a porogen. Using the dry-wet spinning method, hollow fi ber membranes with an average pore diameter of 11–13 nm and fi nger-shaped macrovoids in the substrate layer were obtained from PPSF/NMP/PEG-400 (20/60/20 wt.%) spinning solutions. An increase in the share of –OH end groups increases the hydrophilicity of the polymer. This, in turn, made it possible to obtain hollow fi ber membranes based on PPSF–OH with water permeability of 42 L/(m2 ·h), which is 1.8 times greater than the permeability of the PPSF–Cl membrane. Both membranes demonstrate a retention coeffi cient of 94.7–97.3% according to Blue Dextran calibrant (Mw = 70,000 g∙mole–1).
Author: D. N. Matveev, A. Yu. Raeva, T. S. Anokhina, I. L. Borisov
Keywords: hollow fi ber membranes, polyphenylene sulfone, ultrafi ltration, synthesis, chemical structure
Page: 1560
D. N. Matveev, A. Yu. Raeva, T. S. Anokhina, I. L. Borisov.
CREATION OF ULTRAFILTRATION HOLLOW FIBER MEMBRANES BASED ON POLYPHENYLENE SULFONE WITH DIFFERENT CHEMICAL STRUCTURE OF END GROUPS //Journal of engineering physics and thermophysics.
. Volume 97, №6. P. 1560.
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