▎ 摘　　要

NOVELTY - Method for preparing dopamine modified graphene passivation doped nitramine oxidant involves (a) dispersing graphene oxide with oxygen content of less than or equal to 45% in distilled water or organic solvent to obtain a suspension of graphene oxide after ultrasonic treatment, (b) dissolving the industrial-grade ammonium nitrate crystals in nearly saturated dimethyl sulfoxide at 75-85 degrees C to obtain dimethyl sulfoxide solution of ammonium nitrate crystals after magnetic stirring, (c) adding the graphene oxide suspension to the dimethyl sulfoxide solution, (d) adding hydrogen peroxide to the mixed solution to react for 10-15 minutes to obtain a mixed solution containing polydopamine, and (e) adding distilled water to the mixed solution, maintaining the reaction temperature at 75-85 degrees C, adding in a freeze dryer to obtain graphene oxide-doped ammonium nitrate crystal energetic material with polydopamine as interface material to obtain dopamine modified graphene passivation doped nitramine oxidant. USE - The method is used for preparing dopamine modified graphene passivation doped nitramine oxidant. ADVANTAGE - The method reduces the safety risk during operation by introducing graphene oxide, prepares energetic materials with high stability of ammonium nitrate, has high crystal density, does not change the molecular structure, has excellent thermal stability, increases crystal transformation temperature, and inhibits the occurrence of crystal transformation. DETAILED DESCRIPTION - Method for preparing dopamine modified graphene passivation doped nitramine oxidant involves (a) dispersing graphene oxide with oxygen content of less than or equal to 45% in distilled water or organic solvent to obtain a suspension of graphene oxide after ultrasonic treatment, dissolving dopamine monomer in absolute ethanol to obtain a dopamine ethanol solution at a temperature of 40-50 degrees C, dissolving sodium hydroxide in absolute ethanol under the temperature of 40-50 degrees C, (b) dissolving the industrial-grade ammonium nitrate crystals in nearly saturated dimethyl sulfoxide at 75-85 degrees C to obtain dimethyl sulfoxide solution of ammonium nitrate crystals after magnetic stirring, (c) adding the graphene oxide suspension to the dimethyl sulfoxide solution, stirring and adding the dopamine ethanol solution, reacting for 30-40 minutes to obtain a mixed solution containing ammonium nitrate crystals, dopamine monomer and graphene oxide suspension, (d) adding hydrogen peroxide to the mixed solution to react for 10-15 minutes, adding the sodium hydroxide ethanol solution at the step to adjust pH of less than or equal to 7.5, stirring to dissolve, and reacting at 75-85 degrees C for 60-65 minutes to obtain a mixed solution containing polydopamine, where the mass fraction of the hydrogen peroxide is 30%, and the molar ratio of the hydrogen peroxide to dopamine monomer is 100:3 ( plus minus 0.05), and (e) adding distilled water to the mixed solution, maintaining the reaction temperature at 75-85 degrees C, and filtering by suction after holding for 10-15 minutes, rinsing with distilled water at 40-45 degrees C, adding in a freeze dryer to obtain graphene oxide-doped ammonium nitrate crystal energetic material with polydopamine as interface material, dopamine modified graphene passivation doped nitramine oxidant, 0.5-2 wt.% graphene oxide, and the mass ratio of graphene oxide and dopamine monomer is 1-2:1.