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.

中文翻译：

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用于膜蒸馏的石墨烯-PVDF复合膜的开发

摘要 研制了一种新型PVDF-石墨烯复合膜。具体来说，商业 PVDF 聚合物已适当地用苯乙烯的芳环 (PVDF-f) 进行了功能化，并通过光谱技术进行了表征。由于石墨烯与 PVDF-f 的芳环之间的相互作用，这种新材料已被用作石墨烯粘附的基础。然后，新的 PVDF-f 和 PVDF-f-石墨烯 (PVDF-fG) 聚合物被用于通过相转化技术制备多孔膜，并通过形态、表面和化学物理技术进行广泛表征。它们在亲水性、孔径和机械阻力方面表现出不同的特性。当应用于直接接触膜蒸馏 (DCMD) 时，特别是，