Table 3.
Type of membrane.
| serial number | Type of membrane |
|---|---|
| Ⅰ | Pure PES membrane |
| Ⅱ | SiO2/PES membrane（GCM） |
| Ⅲ | SiO2/PES membrane（GPHM） |
| Ⅳ | OH/SiO2/PES membrane（GCM） |
| Ⅴ | OH/SiO2/PES membrane（GPHM） |
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