▎ 摘　　要

NOVELTY - Preparing nylon powder comprises (1) adding graphene powder to mixed solution of sodium nitrate and sulfuric acid, stirring under ice water bath and adding potassium permanganate, heating reaction, adding hydrogen peroxide to neutralize, and obtain graphene oxide after ultrasound, suction filtering, washing and drying powder, (2) adding graphene oxide powder, diamine, dibasic acid, antioxidant and water to polymerization kettle to polymerize nylon pellets, (3) adding nylon pellets, alcohol, antioxidant, and graphene oxide powder to the reaction kettle, and heating, stirring, cooling, suction filtering, and drying to obtain nylon powder, and (4) mixing nylon powder, antioxidant and flow aid to obtain nylon powder for selective laser sintering. USE - The preparing nylon powder is useful for selective laser sintering (claimed). ADVANTAGE - The powder: has higher crystallinity and high strength. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for nylon powder.