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Influence of solvent, Lewis acid–base complex, and nanoparticles on the morphology and gas separation properties of polysulfone membranes
Author(s) -
Maghami Saeid,
Sadeghi Morteza,
Baghersad Samaneh,
Zornoza Beatriz
Publication year - 2021
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.25708
Subject(s) - polysulfone , membrane , permeation , gas separation , dimethylacetamide , materials science , chemical engineering , polymer chemistry , tetrahydrofuran , nanoparticle , solvent , permeability (electromagnetism) , casting , chemistry , organic chemistry , composite material , nanotechnology , biochemistry , engineering
A series of polysulfone (PSF) membranes were prepared using different solvents: dimethylformamide (DMF), tetrahydrofuran, dimethylacetamide, and n‐methyl‐2‐pyrrolidone (NMP). The PSF membrane prepared by NMP showed the highest gas permeability. The influence of propionic acid as a Lewis acid on gas separation properties of the PSF was explored. The PSF membrane prepared by the casting solution containing 25 wt% PSF, 35 wt% propionic acid, and 40 wt% NMP showed a superior gas separation performance. The gas permeation measurements indicated that incorporating 30 wt% γ‐alumina nanoparticles into the PSF matrix resulted in about the respective 43% and 41% increase in CO 2 and O 2 permeability together with a rise in CO 2 /CH 4 and O 2 /N 2 selectivities (13% and 7%, respectively). Furthermore, by rearranged modified Maxwell model, the role and nature of the interfacial layer in the PSF‐based mixed matrix membranes were mathematically analyzed considering a reduced permeability factor.
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