Enhanced performance of TFC nanofiltration membranes based on UiO-66-NH2 mixed matrix membranes

초록

This study proposes an innovative strategy by incorporating UiO-66-NH2 into a polyethersulfone (PES) substrate and fabricating thin-film composite (TFC) membranes via the interfacial polymerization (IP) method. Incorporation of UiO-66-NH2 to the substrate membrane changes the structure of the polyamide (PA) layer of the TFC membrane. The TFC membranes have a better hydrophilicity, rougher surface, and thicker PA layer. The TFC M-3 membrane demonstrates exceptional performance: the pure water flux (PWF) of 10.58 L·m−2·h−1·bar−1, the rejection (R) of 98.2 % for Na2SO4 and 95.5 % for MgSO4. Furthermore, the long-term stability of the membrane is improved substantially. It still maintains a high PWF of 10.17 L·m−2·h−1·bar−1 and a high R of over 96 % for Na2SO4. This study demonstrated that the incorporation of UiO-66-NH2 to the substrate membrane can significantly improve the nanofiltration performance of the TFC membrane. © 2025 Elsevier B.V.

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