▎ 摘　　要

NOVELTY - Preparation of a functionalized heat-conducting filler involves mixing 4,4'-oxydianiline, concentrated acid and sodium nitrite solution, and performing diazotization reaction to obtain a product system (A), mixing with the graphene nanosheet dispersion liquid, and grafting to obtain a product system (B), mixing with triethylamine, and naturalizing to obtain the final product. The concentrated acid is concentrated hydrochloric acid or concentrated sulfuric acid. USE - Preparation of functionalized heat-conducting filler used for preparing heterogeneous polyether-ether-ketone composite microsphere for composite material used in aerospace, electrical and electronic, machinery industry or medical application (all claimed). ADVANTAGE - The functional heat-conducting filler has excellent compatibility with polyether-ether-ketone, which is conducive to weakening the interface defect, reduces Van der Waals scattering in the phonon transmission process and interface thermal resistance, improves the phonon transmission efficiency, and enhances the heat-conducting property. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the preparation of heterogeneous polyether-ether-ketone composite microspheres with oriented structures, which involves (s1) mixing an aqueous polymer, a composite filler, polyether-ether-ketone powder and water to obtain a mixed dispersion liquid, pre-freezing the mixed dispersion liquid in a droplet form by using liquid nitrogen to obtain a microsphere precursor, and freeze-drying the microsphere precursor. The composite filler comprises carbon nanotubes functionalized thermally conductive filler.