▎ 摘　　要

NOVELTY - Graphene composite system water-based disinfectant comprises 8-35 wt.% modified coated silver ion dispersion, 20-60 wt.% graphene oxide dispersion, 3.5-8.5 wt.% dispersant, 1.5-3.5 wt.% emulsifying agent, 0.5-1.5 wt.% antifoaming agent, and water (balance amount). The modified coated silver ion dispersion is prepared by (A) passing nitrogen for 5 minutes into dehydrated alcohol, adding 4-vinylpyridine, (3-acrylamidopropyl)trimethylammonium chloride and initiator azobisisobutyronitrile successively, heating the reaction system to 62degrees Celsius, stirring for 30 hours, after completing the reaction, precipitating with deionized water, filtering, washing, and vacuum drying to obtain intermediate product 1, (B) uniformly stirring the intermediate product 1 and nitromethane, (C) uniformly mixing nitromethane and dimethyl sulfoxide, and (D) completely dissolving the complex obtained in the step (C) in absolute ethanol to obtain a modified coated silver ion dispersion. USE - Used as graphene composite system water-based disinfectant. ADVANTAGE - The composite material has good water solubility, and the antibacterial agent made of the composite material has high antibacterial efficiency, low toxicity and non-corrosiveness. DETAILED DESCRIPTION - Graphene composite system water-based disinfectant comprises 8-35 wt.% modified coated silver ion dispersion, 20-60 wt.% graphene oxide dispersion, 3.5-8.5 wt.% dispersant, 1.5-3.5 wt.% emulsifying agent, 0.5-1.5 wt.% antifoaming agent, and water (balance amount). The modified coated silver ion dispersion is prepared by (A) passing nitrogen for 5 minutes into dehydrated alcohol, under nitrogen and stirring state, adding 4-vinylpyridine, (3-acrylamidopropyl)trimethylammonium chloride and initiator azobisisobutyronitrile successively, heating the reaction system to 62degrees Celsius, stirring for 30 hours, after completing the reaction, precipitating with deionized water, filtering, washing, and vacuum drying to obtain intermediate product 1, (B) uniformly stirring the intermediate product 1 and nitromethane, then adding 1-bromohydrocarbon under nitrogen and stirring state, heating the reaction system to 68degrees Celsius, stirring and reacting for 18 hours, after completing the reaction, precipitating with ether, filtering, washing, and drying in vacuum to obtain intermediate product 2, (C) uniformly mixing nitromethane and dimethyl sulfoxide, then adding silver p-toluenesulfonate, ultrasonically dispersing for 5 minutes to obtain solution A, uniformly mixing the intermediate product 2 and nitromethane, obtaining solution B, in an ice bath, dropping solution A into solution B at 200-300 revolutions/minute, where the dropping rate is 1 drop/second, after dropping, raising the temperature of the system to room temperature, continuing stirring and reacting for 20-60 minutes, then precipitating with ether, filtering, washing, and vacuum drying to obtain the silver bromide-coated complex of intermediate product 2, and (D) completely dissolving the complex obtained in the step (C) in absolute ethanol to obtain a modified coated silver ion dispersion. An INDEPENDENT CLAIM is also included for preparing the graphene composite system water-based disinfectant, comprising (a) adding the modified coated silver ion dispersion dropwise to the graphene oxide dispersion liquid under stirring at a rate of 3 drops/second, after completing the dropwise addition, raising the temperature of the reaction system to 68degrees Celsius, continuing the stirring and reacting for 36 hours, stopping stirring, and cooling the mixture to room temperature to obtain a mixed solution C, and (b) uniformly stirring the dispersant, emulsifying agent, antifoaming agent and water at room temperature at 300 revolutions/minute, then at room temperature and 1200 revolutions/minute, adding the mixed solution C obtained in the step (a) and stirring for 4-8 hours to obtain a graphene composite system water-based disinfectant.