Enhanced Hydroxide Conductivity and Dimensional Stability with Blended Membranes Containing Hyperbranched PAES/Linear PPO as Anion Exchange Membranes
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Synthesis of the Hyperbranched Hydrophobic Oligomer
2.3. Synthesis of the Hydrophilic Oligomer
2.4. Synthesis of Hyperbranched Poly(Arylene Ether Sulfone) Block Copolymer
2.5. Synthesis of Brominated HB-PAES (Br-HB-PAES)
2.6. Synthesis of Chloromethylated PPO (CM-PPO)
2.7. Fabrication of the BC-PAES/PPO-XY Blended Membranes
2.8. Quaternization of BC-PAES/PPO-XY Membranes
3. Characterizations
4. Discussion
4.1. Characterization of Br-HB-PAES and CM-PPO Polymers
4.2. Fabrication and Charaterization of Blended Membranes
4.3. Morphology of Q-PAES/PPO-XY Blended Membranes
4.4. Ionic Exchange Capacity, Water Uptake, and Swelling Ratio
4.5. Hydroxide Conductivity and Arrhenius Plots of the Q-PAES/PPO-XY Blended Membranes
4.6. Thermal Properties
4.7. Alkaline Stability
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Conflicts of Interest
References
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Samples | Br-HB-PAES (%) | CM-PPO (%) |
---|---|---|
BC-PAES/PPO-37 | 30 | 70 |
BC-PAES/PPO-46 | 40 | 60 |
BC-PAES/PPO-55 | 50 | 50 |
BC-PAES/PPO-64 | 60 | 40 |
BC-PAES/PPO-73 | 70 | 30 |
Membrane | DMSO | DMF | THF | TCE | NMP | MC | Chloroform | Acetone | Methanol |
---|---|---|---|---|---|---|---|---|---|
BC-PAES/PPO-37 | ++ | ++ | ++ | ++ | ++ | ++ | ++ | - | -- |
BC-PAES/PPO-46 | ++ | ++ | ++ | ++ | ++ | ++ | ++ | - | -- |
BC-PAES/PPO-55 | ++ | ++ | ++ | ++ | ++ | ++ | ++ | - | -- |
BC-PAES/PPO-64 | ++ | + | ++ | ++ | ++ | ++ | + | -- | -- |
BC-PAES/PPO-73 | ++ | ++ | ++ | ++ | ++ | ++ | + | -- | -- |
Membranes | Water Uptake (%) | Swelling Ratio (%) | IEC (mmol g−1) | ||||||
---|---|---|---|---|---|---|---|---|---|
∆i | Δt | ||||||||
30 °C | 50 °C | 70 °C | 90 °C | 30 °C | 90 °C | 30 °C | 90 °C | ||
Q-HB-PAES | 15.5 | 22.7 | 32.0 | 33.2 | 6.5 | 17.9 | 7.1 | 18.2 | 1.24 ± 0.03 |
Q-PAES/PPO-37 | 24.3 | 37.1 | 46.1 | 50.3 | 10.2 | 25.0 | 12.1 | 27.1 | 1.97 ± 0.04 |
Q-PAES/PPO-46 | 23.0 | 35.5 | 45.0 | 49.2 | 9.1 | 24.9 | 11.0 | 28.0 | 1.90 ± 0.03 |
Q-PAES/PPO-55 | 21.3 | 32.9 | 41.4 | 45.4 | 9.0 | 22.7 | 10.7 | 25.7 | 1.79 ± 0.05 |
Q-PAES/PPO-64 | 21.2 | 31.3 | 39.1 | 42.3 | 8.7 | 21.5 | 9.2 | 22.9 | 1.32 ± 0.04 |
Q-PAES/PPO-73 | 16.7 | 23.5 | 32.5 | 34.7 | 7.1 | 20.9 | 8.6 | 21.4 | 1.27 ± 0.05 |
Membranes | Hydroxide Conductivity (mS cm−1) | |||
---|---|---|---|---|
30 °C | 50 °C | 70 °C | 90 °C | |
Q-HB-PAES | 5.1 | 15.3 | 26.4 | 32.8 |
Q-PAES/PPO-37 | 28.4 | 41.5 | 53.7 | 62.9 |
Q-PAES/PPO-46 | 37.9 | 53.7 | 70.5 | 80.2 |
Q-PAES/PPO-55 | 53.9 | 67.9 | 80.9 | 90.9 |
Q-PAES/PPO-64 | 32.9 | 48.9 | 65.5 | 75.2 |
Q-PAES/PPO-73 | 25.1 | 36.4 | 47.4 | 55.3 |
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Kim, S.H.; Lee, K.H.; Chu, J.Y.; Kim, A.R.; Yoo, D.J. Enhanced Hydroxide Conductivity and Dimensional Stability with Blended Membranes Containing Hyperbranched PAES/Linear PPO as Anion Exchange Membranes. Polymers 2020, 12, 3011. https://doi.org/10.3390/polym12123011
Kim SH, Lee KH, Chu JY, Kim AR, Yoo DJ. Enhanced Hydroxide Conductivity and Dimensional Stability with Blended Membranes Containing Hyperbranched PAES/Linear PPO as Anion Exchange Membranes. Polymers. 2020; 12(12):3011. https://doi.org/10.3390/polym12123011
Chicago/Turabian StyleKim, Sang Hee, Kyu Ha Lee, Ji Young Chu, Ae Rhan Kim, and Dong Jin Yoo. 2020. "Enhanced Hydroxide Conductivity and Dimensional Stability with Blended Membranes Containing Hyperbranched PAES/Linear PPO as Anion Exchange Membranes" Polymers 12, no. 12: 3011. https://doi.org/10.3390/polym12123011