▎ 摘　　要

NOVELTY - Preparing functional nanofiber film involves dispersing vinylidene fluoride in a mixed solvent, and stirring to obtain a spinning solution, and performing electrostatic spinning to obtain a PVDF nanofiber film. The carbon oxide nanotube and graphene oxide are ultrasonically dispersed in deionized water to obtain a mixed dispersion liquid. The polyvinylidene fluoride (PVDF) nano-fiber film is coated on the surface of the PVDF nano-fiber film in a vacuum filtration mode to obtain a functional nano-fiber film A. The functional nanofiber film A is soaked in an aqueous phase solution, and removed the solvent. The film is transferred into an organic phase solution for dipping and drying to obtain the functional nanofiber film. USE - Method for preparing functional nanofiber film for seawater desalination. ADVANTAGE - The method enables to make nanofiber film durable, eco-friendly, and improves the desalination performance and chlorine resistance due to use of PVDF nanofiber film as the base film, and the mixture of graphene oxide and carbon oxide nanotubes as the intermediate layer between the base and the polyamide active layer, and added polysiloxane betaine and microporous nanoparticles to the polyamide active layer.