Preparation method of oil-water separation film

The invention discloses a preparation method of an oil-water separation film, and belongs to the technical filed of oil-water separation. The preparation method of the oil-water separation film comprises the steps that an SiO2 microspheric structure is constructed on a cotton woven fabric through a solution-gel method, thus the cotton woven fabric loaded with silicon dioxide microspheres is obtained, and through a solid-phase coupling method, the surface of the cotton woven fabric loaded with the silicon dioxide microspheres is coated with polythiophene formed by thiophene. The preparation method is simple and easy to operate, according to the prepared oil-water separation film, surface energy of the cotton woven fabric is reduced, the cotton woven fabric loaded with the silicon dioxide microspheres has the good hydrophobic effect, water drops cannot wet the surface of the oil-water separation film, but oil drops can smoothly pass through the oil-water separation film, and a cotton woven fabric substrate has