Thickness Effect on CO2/N2 Separation in Double Layer Pebax-1657®/PDMS Membranes
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Membrane Fabrication
2.3. Gas Permeation Measurement
2.4. Resistance Model for Gas Permeation Description on Three-Layer System
3. Results
3.1. Confirmation of the Bulk Permeability Values of PDMS and Pebax-1657
3.2. Resistance Model Predictions for Double Layer Pebax-1657/PDMS Membranes
3.3. Cross Section Morphology of the Thin-Film Composite Membranes
3.4. Comparison of the Experimental Results with Resistance in Series Model Predictions
4. Discussion
Author Contributions
Funding
Conflicts of Interest
References
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Material | CO2 Permeability, Barrer | N2 Permeability, Barrer | Ideal Selectivity | Reference |
---|---|---|---|---|
PDMS | 3395 ± 55 | 307 ± 3 | 11 | This work |
3100 a | 290 | 10.7 | [23] | |
3632 a | 330 c | 11 | [24] | |
3800 ± 70 b | 400 ± 10 b | 9.5 | [21] | |
Pebax-1657 | 128 ± 17 | 2.0 ± 0.4 | 64 | This work |
55.8 | 1.4 | 40.2 | [25] | |
80 | 1.1 | 70 | [29] | |
133 | 2.6 c | 52 | [30] |
Membrane # | Thickness of Pebax-1657 Layer, nm (ls ± Δls) 1 | Thickness of PDMS Layer, nm (lg ± Δlg) 1 | Ratio of Thicknesses, n = lg/ls | Model-Predicted CO2 Permeability, Barrer | Model-Predicted CO2 Permeance, GPU 2 | Model-Predicted Selectivity |
---|---|---|---|---|---|---|
M1 | 343 ± 58 | 307 ± 70 | 0.90 | 235 | 361 ± 71 | 62.3 |
M2 | 380 ± 29 | 428 ± 53 | 1.13 | 261 | 323 ± 33 | 61.8 |
M3 | 279 ± 55 | 626 ± 45 | 2.24 | 383 | 432 ± 47 | 59.9 |
M4 | 292 ± 23 | 2327 ± 164 | 7.97 | 883 | 337 ±24 | 51.8 |
M5 | 385 ± 15 | 10,775 ± 90 | 27.99 | 1805 | 162 ± 2 | 36.8 |
M6 | 320 ± 15 | 19,469 ± 165 | 60.84 | 2403 | 121 ± 1 | 27.1 |
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Selyanchyn, R.; Ariyoshi, M.; Fujikawa, S. Thickness Effect on CO2/N2 Separation in Double Layer Pebax-1657®/PDMS Membranes. Membranes 2018, 8, 121. https://doi.org/10.3390/membranes8040121
Selyanchyn R, Ariyoshi M, Fujikawa S. Thickness Effect on CO2/N2 Separation in Double Layer Pebax-1657®/PDMS Membranes. Membranes. 2018; 8(4):121. https://doi.org/10.3390/membranes8040121
Chicago/Turabian StyleSelyanchyn, Roman, Miho Ariyoshi, and Shigenori Fujikawa. 2018. "Thickness Effect on CO2/N2 Separation in Double Layer Pebax-1657®/PDMS Membranes" Membranes 8, no. 4: 121. https://doi.org/10.3390/membranes8040121