▎ 摘　　要

NOVELTY - Insulation material comprises graphene oxide, zirconium oxide, aluminum oxide and polystyrene mixture in a mass ratio of 1:6-1:8, phenolic resin and curing agent in a mass ratio of 3:1-4:1. The mass ratio of mixture and phenolic resin is 25:1-28:1. The curing agent is water, sulfuric acid and phosphoric acid. USE - Used as insulation material. ADVANTAGE - The material: has better flame retardancy, low smoke density and flame proof grade; and is nontoxic and environmentally friendly. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparation of insulation material comprising (i) taking graphite oxide in crucible, heating in muffle furnace and taking out to obtain expanded graphite, (ii) dispersing in water, adding polystyrene bead aqueous dispersion and ultrasonically treating, where mass ratio of expanded graphite and water is 1:1-1:2 and expanded graphite and polystyrene bead aqueous dispersion is 80:1-60:1, (iii) filtering into foamed nickel, drying, mixing, hydrazine hydrate and aqueous ammonia solution and reacting to obtain graphene-polystyrene base material, (iv) heating to 600-650 degrees C in vacuum furnace for 2-3 hours to obtain graphene, (v) mixing aluminum acid ammonia, milling to obtain graphene-aluminum acid ammonia composite material, where graphene and aluminum acid ammonia mass ratio is preferably 1:1-3:1, (vi) heating to 800-950 degrees C under nitrogen atmosphere and cooling to obtain graphene-alumina composite, (vii) mixing nano-zirconia and milling to obtain graphene-zirconia-alumina composite material, where mass ratio of graphene-alumina composite and nano zirconia is preferably 3:1-4:1, (viii) mixing polystyrene, where graphene-zirconia-alumina is in aqueous solution and mass ratio of graphene-zirconia-alumina and water is 1:20-1:25 and graphene-zirconia-alumina and polystyrene is preferably 1:6-1:8, (ix) adding phenolic resin and curing agent, (x) adding into twin-screw extruder to obtain a molten mixture, (xi) adding supercritical carbon dioxide in the seventh section of the first end of the screw extruder, where mass ratio of supercritical carbon dioxide and mixture is 80:1-90:1 and filling at 24 Mpa, (xii) kneading, where mass ratio of molten mixture in eighth segment and ninth section is 1:1, and (xiii) taking into second screw extruder.