Preparation method and application of metal organic framework thin film on surface of macroporous high polymer hollow fiber pipe

The invention discloses a preparation method and application of a metal organic framework thin film on the surface of a macroporous high polymer hollow fiber pipe. The method comprises the following steps of (1) adding an aqueous solution of ethanolamine into an aqueous solution of copper nitrate, zinc nitrate or cadmium nitrate with the same volume while magnetic stirring, reducing stirring speed, obtaining a corresponding solution of copper hydroxide, zinc hydroxide or cadmium hydroxide nanowires, impregnating a macroporous high polymer hollow fiber film of which one end is sealed and the other end is connected with a suction filtration pump into the solution containing the nanowires, and performing suction filtration for 30 minutes to form a nanowire layer on the surface of the macroporous high polymer hollow fiber film; (2) impregnating the macroporous high polymer hollow fiber film with the nanowire layer on the surface into an organic ligand solution, and performing reaction for 30 minutes at normal temperature. According to the method and the application, a dense organic framework thin film can be directly prepared on the surface of the macroporous high polymer hollow fiber pipe, and can be used for gas separation, the method comprises simple operating steps, and is environment-friendly, and reaction residuals can be easily recovered.