▎ 摘　　要

NOVELTY - Preparing graphene/FeNix nanocomposite particle involves adding graphene, iron(II) sulfate heptahydrate, nickel(II) sulfate hexahydrate to ethanol water solution, stirring and mixing uniformly. The total concentration of iron ion salt and nickel ion salt is 0.01-10 mol/L. The amount of graphene is 0.01-30 wt.% of the total mass of iron ion salt and nickel ion salt, the ratio of iron ion salt and nickel ion salt is 1: 1-20. The solution is placed in a water bath, heated to 70-75 degrees C under vigorous mechanical agitation. USE - Method for preparing graphene/FeNix nanocomposite particle for preparing high performance graphene/FeNix/natural rubber electromagnetic wave absorbing material (claimed). ADVANTAGE - The method enables to prepare graphene/FeNix nanocomposite particle, which is applied in electromagnetic wave absorbing material to improve absorbing performance and electromagnetic wave absorbing material has excellent stable electromagnetic wave absorption performance, uses easy to obtain raw materials, has low production cost, simple preparation method, mild reaction condition and the organic solvent involved in the synthesis process is less. DETAILED DESCRIPTION - Preparing graphene/FeNix nanocomposite particle involves adding graphene, iron(II) sulfate heptahydrate, nickel(II) sulfate hexahydrate to ethanol water solution, stirring and mixing uniformly. The total concentration of iron ion salt and nickel ion salt is 0.01-10 mol/L. The amount of graphene is 0.01-30 wt.% of the total mass of iron ion salt and nickel ion salt, the ratio of iron ion salt and nickel ion salt is 1: 1-20. The solution is placed in a water bath, heated to 70-75 degrees C under vigorous mechanical agitation. The nitrogen gas is passed, and then the sodium hydroxide solution is slowly added dropwise to adjust the pH to 9 to 13. After the reaction is completed, the mixture is cooled to room temperature, separated by magnetic separation and washed with ultrasonic water to obtain graphene/FeNix composite nanoparticles. The ratio of the amount of the hydrazine hydrate solution to the iron ion salt is 30: 1. An INDEPENDENT CLAIM is included for a method for preparing high performance graphene/FeNix/natural rubber electromagnetic wave absorbing material, which involves adding graphene/FeNix composite nanoparticles to the natural latex, and adding and dispersing rubber auxiliary agent and drying to obtain the high performance graphene / FeNix / natural rubber electromagnetic wave absorbing material.