▎ 摘　　要

NOVELTY - Functionalized graphene structure comprises a graphene substrate (1) having a first surface and a second surface, a first polymer layer (2) comprising polymers having a linear or branched chain architecture, where the polymers of the first polymer layer is bound to the first surface of the graphene substrate with its first end, and a first additional polymer layer (3) comprising polymers having a linear or branched chain architecture, where the polymers of the first additional polymer layer is covalently connected to the first polymer layer with its first end and provided with a reactive terminal group at its second end, and the polymers of the first polymer layer and the first additional polymer layer are different. USE - The functionalized graphene structure is used in nanocomposite (claimed) such as graphitic nanoparticles, nanoclays, graphene and nanocellulose. ADVANTAGE - The functionalized graphene structure enables tailoring of nanocomposite materials that have improved properties without or at least with a reduced 'trade-off' of different material properties, reduces processing time, energy and machinery, increases structural accuracy of the polymer layers, and reduces stress relaxation. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: a nanocomposite comprising the functionalized graphene structure dispersed in a polymer matrix comprising matrix polymers selected from one or more of thermoplastics, thermosets and elastomers; method of producing the functionalized graphene structure, comprising providing a graphene substrate having a first and a second surface, activating the first and optionally the second surface of the substrate, arranging a first polymer layer on the first surface of the substrate, where the first polymer layer comprises polymers having a linear or branched chain architecture, the polymers of the first polymer layer is bound to the first surface of the graphene substrate with its first end, and arranging a first additional polymer layer on the first polymer layer, where the first additional polymer layer comprises polymers having a linear or branched chain architecture, the polymers of the first additional polymer layer are different from the polymers of the first polymer layer, the polymers of the first additional polymer layer being covalently connected to the first polymer layer with its first end and provided with a reactive terminal group at a second end, and optionally providing the second surface of the graphene substrate with reactive terminal groups, or arranging a second polymer layer on the second surface of the substrate, where the second polymer layer comprises polymers having a linear or branched chain architecture, the polymers of the second polymer layer is bound to the second surface of the graphene substrate with its first end, and being provided with a reactive terminal group at a second end, or arranging a second polymer layer on the second surface of the substrate, where the second polymer layer comprises polymers having a linear or branched chain architecture, the polymers of the second polymer layer is bound to the second surface of the graphene substrate with its first end, and arranging a second additional polymer layer on the second polymer layer, where the second additional polymer layer comprises polymers having a linear or branched chain architecture, the polymers of the second additional polymer layer are different from the polymers of the second polymer layer, the polymers of the second additional polymer layer is covalently connected to the second polymer layer with its first end and provided with a reactive terminal group at a second end; and method of producing the nanocomposite, comprising providing a polymer matrix, producing the functionalized graphene structure, and mixing the polymer matrix and the functionalized graphene structure, and forming the nanocomposite. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the functionalized graphene structure. 1Graphene substrate 2First polymer layer 3First additional polymer layer