▎ 摘　　要

NOVELTY - Phthalonitrile composite material comprises a heat conducting filler which is distributed in the phthalonitrile matrix resin, or distributed in the heat conducting filler layer at least partially covered on the surface of the phthalonitrile micro-sphere, where the heat conducting filler comprises metal, ceramic, carbon material, metal, composite material of ceramic and/or carbon material, the heat conducting filler comprises copper, silver, aluminum, aluminum oxide, silicon nitride, silicon carbide, aluminum nitride, silicon nitride, boron nitride, graphite, graphene, carbon nano tube and/or alumina-graphite composite material, the phthalonitrile monomer forming the phthalonitrile resin is 4,4'-methylenebis(oxy)diphthalonitrile compounds (I), the heat conducting coefficient of the composite material is at least 0.2 W.m-1.K-1, preferably 0.2-5 W.m-1.K-1, and the volume resistivity of the composite material is not less than 1010 ohm-cm, preferably not less than 1011 ohm-cm. USE - The composite material is useful for heat conduction and insulation fields (claimed). ADVANTAGE - The composite material: has excellent mechanical property, easy processing, low density and less cost; and utilizes thermosetting phthalonitrile resin having excellent thermal stability, water resistance, flame retardance and mechanical property. DETAILED DESCRIPTION - Phthalonitrile composite material comprises a heat conducting filler which is distributed in the phthalonitrile matrix resin, or distributed in the heat conducting filler layer at least partially covered on the surface of the phthalonitrile micro-sphere, where the heat conducting filler comprises metal, ceramic, carbon material, metal, composite material of ceramic and/or carbon material, the heat conducting filler comprises copper, silver, aluminum, aluminum oxide, silicon nitride, silicon carbide, aluminum nitride, silicon nitride, boron nitride, graphite, graphene, carbon nano tube and/or alumina-graphite composite material, the phthalonitrile monomer forming the phthalonitrile resin is 4,4'-methylenebis(oxy)diphthalonitrile compounds of formula (I), the heat conducting coefficient of the composite material is at least 0.2W asterisk m-1 asterisk K-1, preferably 0.2 to 5.0W asterisk m-1 asterisk K-1; Preferably, the volume resistivity of the composite material is not less than 1010 ohm-cm, preferably not less than 1011 ohm-cm. R = benzen-diyl, naphthalen-diyl, biphenyl-diyl, ethane-1,1-diyldibenzen-diyl, benzophenon-diyl, propane-2,2-diyldibenzen-diyl, (perfluoropropane-2,2-diyl)dibenzen-diyl or sulfonyldibenzen-diyl. INDEPENDENT CLAIMS are also included for: (1) alumina-graphite composite material, where the alumina-graphite composite material has a core-shell structure, the shell layer is alumina, the core is graphite particles, alumina is coated on the surface layer of the graphite particles; (2) preparing alumina-graphite composite material, comprising (i) dispersing the graphite and anionic surfactant in deionized water, and completely covering the graphite with the anionic surfactant to obtain stable and uniform mixed solution, (ii) adding aluminum salt solution and alkali solution into the obtained mixed solution at the same time, reacting under stirring condition, after finishing reaction, filtering to obtain precipitate, and performing post-treatment of the precipitate to obtain powder, and (iii) calcining the obtained powder to obtain alumina-graphite composite material; (3) phthalonitrile three-dimensional continuous heat-conducting network structure composite material, which is prepared by o-phthaloyl nitrile composite material; and (4) preparing phthalonitrile-based three-dimensional continuous thermally conductive network structure composite material, comprising preparing raw material containing phthalonitrile-based composite material, it is obtained from the phthalonitrile-based composite material with core-shell structure through a hot-pressing reaction.