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A systematic study on the effects of synthesis conditions of polyamide selective layer on the CO 2 / N 2 separation of thin film composite polyamide membranes
Author(s) -
Kamali Mahsa,
Gharibi Fatemeh,
Sharif Alireza
Publication year - 2021
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.50927
Subject(s) - permeance , selectivity , polyamide , sodium hydroxide , thin film composite membrane , hexane , materials science , chemical engineering , pulmonary surfactant , heptane , solvent , chemistry , chromatography , polymer chemistry , organic chemistry , membrane , reverse osmosis , biochemistry , engineering , catalysis
Different top layer fabrication methods (amine‐first, acid‐first, spin coating), organic phase solvents (hexane, heptane, mixed hexane/heptane), acid acceptors (triethylamine, sodium carbonate, sodium hydroxide), and surfactant sodium dodecyl sulfate concentrations (0, 0.05, and 0.1 wt%) were utilized to fabricate thin film composite polyamide membranes for CO 2 /N 2 separation. The results, according to an L9 orthogonal array of Taguchi approach, showed that employing acid‐first method increases both CO 2 permeance and CO 2 /N 2 selectivity of the membranes at a feed gas pressure of 3 bars. On the other hand, sodium hydroxide, and triethylamine should be used, as acid acceptors, to maximize CO 2 permeance and CO 2 /N 2 selectivity, respectively. Moreover, the use of hexane solvent and 0 wt% surfactant led to maximum permeance, while, hexane solvent and 0.1 wt% surfactant were needed to reach the highest selectivity. The above level setting of synthesis parameters also resulted in the minimum sensitivity of the fabrication process to the noise factors effects. As shown by the analysis of variance, acid acceptor, and organic solvent types were the most influential parameters on CO 2 permeance and CO 2 /N 2 selectivity, respectively. The effects of fabrication method and surfactant concentration, as single factors, on permeation/selectivity responses were also investigated.