Lined hollow fiber microfiltration membrane filament and preparation method thereof

The invention provides a lined hollow fiber microfiltration membrane filament and a preparation method thereof, and belongs to the field of separation membrane preparation. The preparation method comprises the steps of sequentially adding 60-70 parts of N, N-dimethylacetamide, 18-22 parts of polyvinylidene fluoride, 10-15 parts of polyvinylpyrrolidone, 6-10 parts of polyethylene glycol, 0.5-3 parts of graphene oxide, 0.5-3 parts of carbon nanotubes and 0.5-3 parts of carbon fibers into a stirring kettle, and uniformly stirring in an oil bath to obtain a membrane casting solution; penetrating a hollow braided tube into a spinning nozzle, and injecting the membrane casting solution into spinning equipment at the same time; and drawing the hollow braided tube, coating the membrane casting solution, carrying out air bath, water coagulating bath and rinsing water bath, collecting filaments, and carrying out heat treatment in water bath at the temperature of 60-80 DEG C for 0.5-2.5 hours to obtain the hollow fiber