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The roughness of composite NF membranes.
| Membrane ID | Roughness | ||
|---|---|---|---|
| Ra (nm) | Rq (nm) | Rz (nm) | |
| TFC-blank | 23.2 | 30.9 | 90.9 |
| TFN-GHC-10 | 21.9 | 28.0 | 83.1 |
| TFN-GHC-20 | 19.5 | 26.6 | 91.2 |
| TFN-GHC-40 | 16.0 | 20.0 | 69.4 |
| TFN-GHC-60 | 13.8 | 17.9 | 54.1 |
| TFN-GHC-80 | 26.7 | 39.8 | 93.5 |
