Highly-efficient PVDF/Cu-BTC composite ultrafiltration membrane was fabricated in situ on a poly (vinyl difluoride) through a facile self-template method at room temperature. The template of copper hydroxysulfates was pre-grown on PVDF membrane, served as the source of metal ion and in situ transformed into Cu-BTC crystal in the precursor solution of ligand, which avoided the self-nucleation of MOF in the solution and formed an ordered MOF array. The as-synthesized PVDF/Cu-BTC was fully characterized by SEM, FTIR, XRD, XPS and EDX. And its performances including hydrophilicity, porosity, pure water flux and antifouling were also investigated. The result showed that the newly-developed PVDF/Cu-BTC composite ultrafiltration membrane exhibited a declined water contact angle of 48° and an increased porosity of 80% comparing with pure PVDF ultrafiltration membrane. Meanwhile, the resultant membrane showed a high pure water flux up to 480 L/(m<sup>2</sup>*h) and maintain a high BSA rejection rate of 99%. The self-template synthesis approach provides new idea and means for the development of advanced PVDF/MOF composite ultrafiltration membrane in wastewater treatment application.

Development of an <i>in situ</i> self-template strategy for highly efficient PVDF/Cu-BTC composite ultrafiltration membrane

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

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Development of an in situ self-template strategy for highly efficient PVDF/Cu-BTC composite ultrafiltration membrane