▎ 摘　　要

NOVELTY - Method comprises preparing graphene coated with magnetic nano-particles comprises dispersing graphene in deionized water, electrostatically adsorbing poly(4-styrene sodium sulfonate and polydiallyldimethylammonium chloride to obtain positive charged coated graphene, adding negatively charged ferric oxide and reacting to obtain graphene coated with magnetic nano-particles, preparing oriented silica gel sheet comprises transferring graphene silica gel pre-polymer to a mold, performing magnetic field orientation until the graphene silica gel pre-polymer is initially cured, curing, drying to obtain product, coating the graphene silica gel pre-polymer on the surface of the metal foam plate, drying to obtain a coated metal foam plate and preparing interface material comprises taking oriented silica gel sheet and coated metal foam sheet, forming blank based on structure of oriented silica gel sheet/coated metal foam sheet/oriented silica gel sheet and compounding to obtain the product. USE - The interface material is useful in electronic element radiating field. ADVANTAGE - The interface material has high heat conductivity coefficient while maintaining excellent flexibility and compressibility. DETAILED DESCRIPTION - Method comprises (a) preparing graphene coated with magnetic nano-particles comprises dispersing graphene in deionized water, electrostatically adsorbing poly(4-styrene sodium sulfonate) (PSS) and polydiallyldimethylammonium chloride (PDDA) to obtain positive charged coated graphene, adding negatively charged ferric oxide and reacting to obtain graphene coated with magnetic nano-particles, (b) preparing graphene-containing silica gel pre-polymer comprises taking vinyl-terminated polydimethylsiloxane, methyl hydrogen-containing silicone oil, catalyst, inhibitor and graphene coated with magnetic particles prepared in (a), mixing, vacuum stirring, obtaining graphene silica gel pre-polymer, (c) preparing oriented silica gel sheet comprises transferring the graphene silica gel pre-polymer obtained in step (b) to a mold, performing magnetic field orientation until the graphene silica gel pre-polymer is initially cured, curing, drying to obtain an oriented silica gel sheet, (d) coating the graphene silica gel pre-polymer on the surface of the foamed metal comprises coating the graphene silica gel pre-polymer obtained in step (b) on the surface of the metal foam plate, drying to obtain a coated metal foam plate and (e) preparing interface material comprises taking the oriented silica gel sheet in step (c) and the coated metal foam sheet in step (d), forming blank based on the structure of oriented silica gel sheet/coated metal foam sheet/oriented silica gel sheet and compounding to obtain the product. An INDEPENDENT CLAIM is also included for a metal foam/oriented graphene laminate composite high heat-conducting flexible interface material, which is prepared by the above method. The interface material comprises middle framework layer (1) and a heat-conducting silica gel layer (2) is set on the upper and lower surfaces of the middle framework layer. The heat-conducting silica gel layer is added with graphene (21) at least part of the graphene is directionally arranged after being orientated by the external magnetic field. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the interface material in electronic element radiating field. 1Middle framework layer 2Heat-conducting silica gel 21Graphene