Table 4.
Surface porosity (%) of the pristine PVDF (p-PVDF), coated PVDF membranes with FAS/TEOS (Coat-TEOS) and FAS/APTES (Coat-APTES) and modified membranes with oxygen plasma activation at 15 W for a period of 15 min and functionalised with FAS/TEOS (PO2-TEOS) and FAS/APTES (PO2-APTES) before and after its use in the long-term stability tests.
| Membrane | Before Stability Test | After Stability Test |
|---|---|---|
| p-PVDF | 11 ± 3% | 5 ± 1% |
| Coat-TEOS | 8 ± 1% | 4 ± 2% |
| Coat-APTES | 10 ± 2% | 3 ± 3% |
| PO2-TEOS | 15 ± 4% | 6 ± 3% |
| PO2-APTES | 15 ± 3% | 7 ± 1% |