A novel PVDF-graphene composite membrane has been developed. Specifically, a commercial PVDF polymer has been suitably functionalized with the aromatic rings of styrene (PVDF-f) and characterized by spectroscopic techniques. This new material has been used as a base for the adhesion of graphene, owing to the interaction between graphene and the aromatic rings of PVDF-f. The new PVDF-f and PVDF-f-graphene (PVDF-f-G) polymers were, then, used for the preparation of porous membranes by phase inversion technique and extensively characterized by morphological, surface and chemical-physical techniques. They displayed different properties in terms of hydrophilicity, pore size and mechanical resistance. When applied in direct contact membrane distillation (DCMD), in particular, the PVDF-f-G membranes showed long-lasting salt rejection (higher than 99.9%) and higher stability in time.

Development of graphene-PVDF composite membranes for membrane distillation

Galiano F.;Mancuso R.;Gabriele B.;Figoli A.;Drioli E.
2020-01-01

Abstract

A novel PVDF-graphene composite membrane has been developed. Specifically, a commercial PVDF polymer has been suitably functionalized with the aromatic rings of styrene (PVDF-f) and characterized by spectroscopic techniques. This new material has been used as a base for the adhesion of graphene, owing to the interaction between graphene and the aromatic rings of PVDF-f. The new PVDF-f and PVDF-f-graphene (PVDF-f-G) polymers were, then, used for the preparation of porous membranes by phase inversion technique and extensively characterized by morphological, surface and chemical-physical techniques. They displayed different properties in terms of hydrophilicity, pore size and mechanical resistance. When applied in direct contact membrane distillation (DCMD), in particular, the PVDF-f-G membranes showed long-lasting salt rejection (higher than 99.9%) and higher stability in time.
Direct contact membrane distillation (DCMD)
Functionalized membranes
Graphene
Membrane preparation
PVDF membranes
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/310599
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