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| Sr. no. | TPU-PSS/DVB membranes | Ion exchange capacity (meq. g−1) | Water uptake (%) |
|---|---|---|---|
| 1 | Pristine TPU | — | 27 |
| 2 | 40 wt% PSS/DVB | 1.08 | 45 |
| 3 | 50 wt% PSS/DVB | 1.2 | 51 |
| 4 | 55 wt% PSS/DVB | 1.32 | 54 |
| 5 | 60 wt% PSS/DVB | 1.43 | 63 |
