▎ 摘　　要

NOVELTY - A graphene/polypropylene non-woven fabric filter preparing method involves modifying the graphene surface, preparing graphene/polypropylene resin composite master batch, preparing graphene/polypropylene melt-blown non-woven cloth filter screen, oxidizing graphene into de-ionized water to form graphene oxide dispersion liquid, preparing biphenyl-4-carboxylic acid-modified reducing graphene oxide, putting biphenyl-4-carboxylic acid and ammonia water into the graphene oxide dispersion liquid, stirring, adding reducing agent to react in mixed solution, washing, adding aniline into the phosphoric acid solution to stir and processing to obtain biphenyl-4-carboxylic acid-modified reducing graphene oxide dispersion of phosphoric acid, which is added with 2-aminophenol-4-sulfonic acid and phosphoric acid solution, stirred, filtered, washed, followed by dispersing in xylene, washing, carrying out drying treatment, extruding, melting and fusing and thermally bonding non-woven fabric by adhesive. USE - Method for preparing graphene/polypropylene non-woven fabric filter for use in air filtration (claimed). ADVANTAGE - The method enables preparing the graphene/polypropylene non-woven fabric filter with effectively improving the trapping efficiency and killing bacteria. DETAILED DESCRIPTION - A graphene/polypropylene non-woven fabric filter preparing method involves modifying the graphene surface, preparing graphene/polypropylene resin composite master batch, preparing graphene/polypropylene melt-blown non-woven cloth filter screen, oxidizing graphene into de-ionized water to form graphene oxide dispersion liquid, preparing biphenyl-4-carboxylic acid-modified reducing graphene oxide under the protection of nitrogen, putting biphenyl-4-carboxylic acid and ammonia water into the graphene oxide dispersion liquid and stirring to form uniform mixed solution. The mixed solution is added with reducing agent to react in the mixed solution, detergent washed the reaction product after filtering to obtain the biphenyl-4-carboxylic acid-modified reduction-oxidation graphene oxide, which is added with aniline into the phosphoric acid solution to stir, ultrasonic processed for 1-1.5 hours to obtain biphenyl-4-carboxylic acid-modified reducing graphene oxide dispersion of phosphoric acid, added 2-aminophenol-4-sulfonic acid and phosphoric acid solution to the biphenyl-4-carboxylic acid-modified reducing graphene phosphoric acid dispersion, stirred at room temperature, filtered, washed to obtain polyaniline nano fiber graft modified reduced graphene oxide. The polyaniline nano fiber graft-modified reduced graphene oxide is dispersed in xylene, utilized ethanol and dimethylbenzene as detergent, washed by master batch-melting composite method for preparing graphene/polypropylene resin composite master batch, carried out drying treatment for graphene/polypropylene composite resin master batch, extruded, melted and fused the formed polymer solution, quantitive conveyed to the nozzle, extruded through a nozzle, formed superfine fiber under blowing action of the high pressure hot air stream and thermally bonded non-woven fabric by adhesive, where the mass percentage of grapheme oxide in the graphene oxide dispersion is 0.1-1%.