▎ 摘　　要

NOVELTY - Graphene-polypropylene electret air filtering antibacterial fibers comprises 0.5-15 pts. wt. graphene powder, 77-95.5 pts. wt. polypropylene powder, 1-3 pts. wt. organic peroxide, 3-5 pts. wt. maleic anhydride-grafted polypropylene and 1-15 pts. wt. electret material. USE - Used as graphene-polypropylene electret air filtering antibacterial fibers. ADVANTAGE - The electret air filtering antibacterial fibers have low cytotoxicity, excellent biocompatibility and stable antibacterial performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing graphene-polypropylene electret air filtering antibacterial fibers, comprising (i) drying polypropylene powder in a vacuum drying box, adding graphene powder, dried polypropylene powder, organic peroxide, electret material and maleic anhydride-grafted polypropylene into a ball milling tank and ball milling to obtain ball milled mixture, (ii) drying ball milled mixture in a vacuum drying box, extruding and granulating using a twin-screw extruder to obtain graphene-polypropylene composite material masterbatch, and (iii) melting graphene-polypropylene composite material masterbatch in a screw rod extruder, conveying into the spinning position, then conveying quantitatively into the spinning component using a spinning pump, filtering, extruding from the capillary holes of the spinneret, subjecting to electret treatment using an electrifying device, gradually solidifying composite material solution when passing through the cooling medium and stretching into filament at high speed using a winding device to obtain final product.