▎ 摘　　要

NOVELTY - Preparation of nanofiber film comprises adding graphene oxide to dimethylformamide solution of silane coupling agent, stirring and reacting, removing upper solvent, collecting lower particle precipitate, adding dimethylformamide solution, centrifuging, adding epoxy modified polyurethane emulsion, ultrasonically stirring and continuously reacting; dissolving polyacrylamide into aqueous solution, stirring, adding rectorite, ultrasonically dispersing, centrifuging, collecting precipitate, drying in oven and grinding; mixing graphene oxide epoxy modified polyurethane, polyacrylamide modified rectorite and ethylene-vinyl acetate copolymer in mixed solvent, stirring, adding polyethylene, dimethyl diallyl ammonium chloride, poly-epichlorohydrin-dimethylamine, lauryl alcohol ester, polyhexamethylene biguanide hydrochloride and polyvinylpyrrolidone, continuously stirring and ultrasonically treating to obtain electrostatic spinning solution; and electrostatically spinning into nanofiber. USE - Method for preparing nanofiber film used for treating industrial wastewater (claimed). ADVANTAGE - The film improves dispersibility, compatibility and interface bonding force of raw materials, improves adsorption, exhibits good mechanical strength, and has heavy metal ion and dye removal rate of more than 90%. DETAILED DESCRIPTION - Preparation of nanofiber film comprises: (A) adding 100 pts. wt. graphene oxide to 10-20 times by weight of 8-25 wt.% dimethylformamide solution of silane coupling agent, stirring and reacting at 75-85 degrees C for 5-10 hours, removing upper solvent, collecting lower particle precipitate, adding 25-40 wt.% dimethylformamide solution, centrifuging for 30-50 minutes, adding 50-80 pts. wt. epoxy modified polyurethane emulsion, ultrasonically stirring and continuously reacting at 50-60 degrees C for 2-4 hours to obtain graphene oxide epoxy modified polyurethane; (B) dissolving 100 pts. wt. polyacrylamide into 20-40 wt.% aqueous solution, stirring, adding 50-100 pts. wt. rectorite, ultrasonically dispersing at 30-40 degrees C for 30-60 minutes, centrifuging, collecting precipitate, drying in oven and grinding to 50-100 mesh to obtain polyacrylamide modified rectorite; (C) mixing 40-80 pts. wt. graphene oxide epoxy modified polyurethane, 20-50 pts. wt. polyacrylamide modified rectorite and 15-30 pts. wt. ethylene-vinyl acetate copolymer in 6-12 times by weight mixed solvent, stirring at 30-35 degrees C for 1-2 hours, adding 5-10 pts. wt. polyethylene, 4-8 pts. wt. dimethyl diallyl ammonium chloride, 3-6 pts. wt. poly-epichlorohydrin-dimethylamine, 4-7 pts. wt. lauryl alcohol ester, 7-14 pts. wt. polyhexamethylene biguanide hydrochloride and 3-6 pts. wt. polyvinylpyrrolidone, continuously stirring at 25-30 degrees C for 2-4 hours and ultrasonically treating for 30-60 minutes to obtain electrostatic spinning solution; and (D) electrostatically spinning into nanofiber at voltage of 25-50 KV, receiving distance of 10-20 cm, spinning hole inner diameter of 0.5-1.0 mm and spinning speed of 25-50 ~L/minute.