Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 38, Pages 35501-35508Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b13862
Keywords
zwitterionic nanoparticles; membrane separation; magnetic-controlled surface segregation; antifouling; long-term stability
Funding
- National Natural Science Foundation of China [21878062]
- Open Project of State Key Laboratory of Urban Water Resource and Environment (Harbin Institute Technology) [QA201922]
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Novel multifunctional core-shell nanoparticles (Fe3O4@PSBMA NPs) with magnetic and zwitterionic properties were first synthesized and efficiently incorporated into the poly(vinylidene fluoride) (PVDF) membranes via magnetically controlled surface segregation toward the better water-energy-food nexus. The combination of zwitterionic polymers poly(sulfobetaine methacrylate) (PSBMA) and Fe3O4 particles can improve the compatibility of additives with the PVDF matrix and significantly improve the migration of Fe3O4@PSBMA NPs onto membrane surfaces under magnetic fields during nonsolvent-induced phase separations. The modified membrane with surface-enriched multifunctional zwitterionic NPs had an enhanced water flux (168%, similar to 630.5 L m(-2)h), excellent fouling resistance (similar to 93.8%), and increased rejection to bovine serum albumin (94.1%). Most importantly, the PVDF/M-Fe3O4@PSBMA membrane had excellent stability under the long-term filtration test for practical water-treatment applications.
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