Table 4.
The results of measurements of transport properties, water contact angle, and thermal stability of the initial film and membranes.
Sample | F | M1 | M2 | M3 | M4 | M5 | |
---|---|---|---|---|---|---|---|
The biggest through pore, nm | – | 62 | 82 | 142 | 240 | 259 | |
MFP, nm | – | 12 | 17 | 30 | 51 | 75 | |
Permeance, L m−2 h−1 bar−1 | – | 11.6 | 25.6 | 46.4 | 81 | 134 | |
Rejection, % | – | >99 | >99 | 76 | 53 | 22 | |
water contact angle, ° | 125 | 128 | 128 | 131 | 129 | 130 | |
Volume shrinkage (%) at a temperature |
90 °C | 0 | 0 | 0 | 0 | 0 | 0 |
100 °C | 0 | 0 | 0 | 0 | 0.9 | 1.3 | |
110 °C | 0 | 0 | 0 | 0.7 | 3.1 | 5.2 | |
120 °C | 0 | 0 | 0 | 1.5 | 5.1 | 5.8 |