▎ 摘　　要

NOVELTY - Graphene-modified mosquito-repellent antibacterial type 3D printing magnetic material comprises 40-50 pts. wt. polylactic acid, 20-25 pts. wt. ABS, 10-20 pts. wt. ABS emulsion, 5-10 pts. wt. styrene-acrylonitrile glycidyl methacrylate copolymer, 0.01-0.05 pts. wt. butyl triphenyl phosphonium bromide, 5-10 pts. wt. composite filler, 15-30 pts. wt. magnetic composite material and 1-3 pts. wt. functional materials. Graphene is quantum dots graphene and porous graphene. USE - Graphene-modified mosquito-repellent antibacterial type 3D printing magnetic material. ADVANTAGE - Graphene-modified mosquito-repellent antibacterial type 3D printing magnetic material has more excellent mechanical electric property, magnetic property, and also has best mosquito antibacterial performance. DETAILED DESCRIPTION - Graphene-modified mosquito-repellent antibacterial type 3D printing magnetic material comprises 40-50 pts. wt. polylactic acid, 20-25 pts. wt. ABS, 10-20 pts. wt. ABS emulsion, 5-10 pts. wt. styrene-acrylonitrile glycidyl methacrylate copolymer, 0.01-0.05 pts. wt. butyl triphenyl phosphonium bromide, 5-10 pts. wt. composite filler, 15-30 pts. wt. magnetic composite material and 1-3 pts. wt. functional materials. Graphene is quantum dots graphene and porous graphene. The magnetic composite material is composed of graphene/iron oxide powder and multi-walled carbon nanotube/neodymium, iron, boron powder in a weight ratio of 3:2. Composite filler is composed of graphene/silicon dioxide composite filler and graphene/calcium carbonate composite filler in a weight ratio of 3:1. Functional material is composed of multi-walled carbon nanotube/nano silver/silicon dioxide antimicrobial material and insect repellent particles in a weight ratio of 3:2. Graphene quantum dots comprise 0.5-1wt.% polylactic acid, 0.1-2wt.% porous graphene. Graphene-modified mosquito-repellent antibacterial type 3D printing magnetic material is prepared by pretreating polylactic acid raw materials and crushing to obtain 300 mesh powder. Powder is dispersed into pure water, and placed for ultrasonic treatment for 1 hour, washed and dried to obtain pre-polylactic acid. Composite filler is dispersed into pure water by ultrasonically stirring to obtain composite filler solution, and prepared filler is prepared by dissolving half of the pretreated polylactic acid into an organic solvent at heating temperature to obtain polylactic acid solution. Polylactic acid solution is added into first part and second part of polylactic acid solution for further use under condition of constant temperature and ultrasonic stirring for 30-60 minutes. First part of polylactic acid solution is added under stirring, then polylactic acid solution is added into storage tank of spray drier under stirring poly lactic acid solution. Graphene quantum dot solution is added with ultrasonically stirring to obtain filler polylactic acid mixture liquid. Filler polylactic acid mixture liquid is sprayed into a spray drier at a speed of 200-300ml/minutes to obtain PLA/filler masterbatch. Magnetic composite material is dispersed into pure water by ultrasonic stirring, and other half of pretreated polylactic acid is dissolved into an organic solvent to obtain a polylactic acid solution. Third part is divided into two parts and fourth part is reserved for use under the constant temperature condition. Third polylactic acid solution is added under stirring and magnetic compound solution is dropped under stirring. Graphene quantum dot solution is added and mixture of polylactic acid and magnetic polylactic acid is sprayed into a spray drier in a storage tank, and dried to obtain PLA/magnetic powder masterbatch. INDEPENDENT CLAIMS are included for: (1) method for preparing graphene, which involves taking a certain acid graphite in air at 1000 degrees C for 2 hours, then 1100 degrees C fro in-situ reduction for 1.0 hours in presence of 8% nitrogen and hydrogen mixed gas; adding polyethylene glycol in mass ratio of 3% and dianhydride naphthalene in mass ratio of 5.0%; adding water in concentration of 82.0% to obtain slurry; maintaining ultrasonic power to 700W under speed for 4000 rotations per minute for 10 hours; adjusting power and speed of ball mill, then separating by using centrifugation, freezing and drying to obtain graphene solid; and (2) a method for preparing grapheme/silicon dioxide composite filler, which involves dispersing graphite alkene under ultrasonic stirring in ethanol; adding a certain proportion of water and ammonia water under stirring; adding ethyl orthosilicate and graphite alkene with quality ratio of 1.6:1; adjusting the pH value and temperature to 9 and 25 degrees C respectively for 4.2 hours; using acetone and deionized water to wash to obtain precipitate; drying precipitate at 90 degrees C for 2 hours to obtain graphene composite filler coated with silicon dioxide; and (3) a method for preparing graphene/calcium carbonate composite filler, which involves dissolving 1 pts. wt. graphene into 100ml deionized water under supersonic vibration at centrifugation speed of 1300 rotations per minute and dispersing for 200 minutes to obtain graphene dispersing liquid; adding 73 pts. wt. quantum dot calcium carbonate into 500ml deionized water under stirring to obtain calcium carbonate dispersion; dripping calcium carbonate dispersion liquid under ultrasonic treatment for 60 minutes; filtering mixture and drying to obtain graphene/calcium carbonate composite filler; and (4) a method for preparing graphene/iron oxide powder, which involves adding graphene into 100ml of deionized water and dispersing under ultrasonic vibration at centrifugation speed of 1300 rotations per minute to obtain graphene dispersion; adding ferric oxide powder into 100ml deionized water under stirring to obtain iron oxide dispersion; filtering mixture and, drying to obtain graphene/oxide powder; mixing graphene and iron oxide in mass ratio of 1:3 to obtain ferric oxide; and (5) a method for preparing multi-walled carbon nano tubes/carbon neodymium, iron, boron powder, which involves dissolving multi-walled carbon nano-tube into 100ml deionized water, under ultrasonic vibration stirring and dispersing for 200 minutes to obtain multi-walled carbon nano-tube dispersion; adding neodymium magnet powder into 100ml deionized water, at 1500 rotations per minute and dispersing for 300 minutes to obtain boron dispersion; dropping boron dispersion into multi-walled carbon nano dispersion liquid, then filtering, and drying to obtain multi-walled carbon nano tube/neodymium, iron, boron powder; and mixing multi-walled carbon nanotube and boron powder in mass ratio of 1:2.