Zwitterionic-functionalized GO/PVDF nanocomposite membranes with improved anti-fouling properties

摘要: Abstract Herein, novel anti-fouling nanocomposite membranes were developed by the incorporating of zwitterionic-modified graphene oxide (GO-g-PMSA) sheets bearing –SO3− and –NH3+ groups into polyvinylidene fluoride (PVDF) matrix. The GO-g-PMSA nanosheets synthesized growing PMSA zwitterionic brushes on GO surface redox graft polymerization via “graft-from” strategy, causing twofold advantages increasing Go dispersibility in membrane matrix giving more antifouling property to GO. incorporation additive PVDF significantly improved water affinity hydrophilicity membranes. Comparing pure GO/PVDF membranes, as-prepared GO-g-PMSA/PVDF showed evident improvement properties due smoother hydrophilic presence brushes. An optimum performance was obtained for 1 wt% membrane, e.g. FRR = 95.3%, Rr = 32.3% Rir = 4.7% (testing with 1 g.L-1 Buffer phosphate BSA solution at 0.7 MPa). salt rejection experiments also high ions rejection. Taken together, results confirmed that polymer modified as an can be potentially applied fabricate