Preparation Method for Hollow Fiber Inorganic Membrane

A method of preparing hollow fiber inorganic membrane, characterized in that, the method comprising the following steps:

• adding an inorganic material, a polymer, and a binder in an organic solvent to form a mixture, ball milling for 18-24 hours, then vacuuming 24-48 hours to obtain a casting liquid solution;
• using tap water as an internal coagulant, spinning the casting liquid solution by a spinneret and a syringe pump to obtain a membrane filament;
• using tap water and/or an organic solvent as an external coagulant, placing the membrane filament into the external coagulant, and carrying out phase inversion under a temperature condition of 19.5-20.5° C. for 24-48 hours, then taking out and drying for 24-48 hours to obtain a base membrane raw body;
• carrying out calcination of the base membrane raw body under a calcination temperature condition of 800-950° C. for 1-2 hours to obtain a hollow base membrane;
• and
• preparing a separation layer on an outer surface of the hollow base membrane by using electrochemical deposition method, sol-gel method, or chemical vapor deposition method to obtain the hollow fiber inorganic membrane.