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- W4226341192 abstract "A substrate with bicontinuous structure is attractive for thin-film composite (TFC) membrane synthesis due to its high surface porosity and well-interconnected bulk morphology. In this study, the vapor-induced phase separation (VIPS) of the casting solution comprising water, 2-pyrrolidone, and polyethersulfone (PES) was studied. By tuning the water addition in the casting solution and water vapor exposure time, the optimized substrate exhibited a bicontinuous surface with a high porosity of 24.2% (or 216/μm 2 pore density), thereby mitigating pore restriction and showing a high CO 2 permeance of 2.94 × 10 5 GPU. Compared to the benchmark PES substrate with cellular surface pores and lower gas permeance, the use of the bicontinuous substrate led to a 12% increase in the CO 2 permeance of the TFC membrane. The mitigated pore restriction was further rationalized by a resistance-in-series model. The analysis of the lateral diffusion and substrate resistances indicates that an even higher surface pore density of the substrate is required to fully realize the potential of ultra-permeable, CO 2 -selective polymers in the TFC configuration. Lastly, the scalability of the VIPS process was demonstrated by the roll-to-roll fabrication of the optimized bicontinuous substrate with a width of 21ʺ and a length of >100′. • Bicontinuous substrates were prepared by vapor-induced phase separation. • Highly porous surface reduced pore restriction for thin-film composite membrane. • The improved substrate led to 12% increase in composite membrane CO 2 permeance. • Scalable fabrication was demonstrated by a roll-to-roll process." @default.
- W4226341192 created "2022-05-05" @default.
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- W4226341192 date "2022-07-01" @default.
- W4226341192 modified "2023-10-14" @default.
- W4226341192 title "Bicontinuous substrates with reduced pore restriction for CO2-selective composite membranes" @default.
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- W4226341192 doi "https://doi.org/10.1016/j.memsci.2022.120547" @default.
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