▎ 摘　　要

NOVELTY - An integral graphene film from chemically functionalized graphene sheets is produced by (a) preparing a graphene dispersion having chemically functionalized graphene sheets dispersed in liquid medium where chemically functionalized graphene sheets comprise chemical functional groups attached to and non-carbon element content of 0.1-47 wt.%; (b) dispensing and depositing a wet film of graphene dispersion onto a supporting substrate; (c) using heat, electromagnetic waves, UV light, and/or high-energy radiation to induce chemical reactions or chemical bonding between chemical functional groups attached to adjacent chemically functionalized graphene sheets in dried graphene film to form integral graphene film; (d) optionally compressing the integral graphene film to increase a degree of graphene sheet orientation and physical density, and to improve contact between chemically functionalized graphene sheets; and (e) optionally reducing the non-carbon content to less than or equal to 20 wt.%. USE - Production of integral graphene film from chemically functionalized graphene sheets. ADVANTAGE - The method produces integral graphene film that exhibits a combination of exceptionally high tensile strength, elastic modulus, thermal conductivity, and electrical conductivity along all in-plane directions. DETAILED DESCRIPTION - An integral graphene film from chemically functionalized graphene sheets is produced by (a) preparing a graphene dispersion having chemically functionalized graphene sheets dispersed in liquid medium where chemically functionalized graphene sheets comprise chemical functional groups attached to and non-carbon element content of 0.1-47 wt.%; (b) dispensing and depositing a wet film of graphene dispersion onto a supporting substrate where the dispensing and depositing procedure includes mechanical shear stress-induced alignment of chemically functionalized graphene sheets along a film planar direction, and partially or completely removing liquid medium from wet film to form a dried graphene film comprising aligned chemically functionalized graphene sheets; (c) using heat, electromagnetic waves, UV light, and/or high-energy radiation to induce chemical reactions or chemical bonding between chemical functional groups attached to adjacent chemically functionalized graphene sheets in dried graphene film to form integral graphene film, where integral graphene film comprises chemically functionalized graphene sheets that are chemically bonded or interconnected with one another having an inter-planar spacing d002 of 0.36-1.5 nm as determined by X-ray diffraction and non-carbon element content of 0.1-47 wt.%, where the functionalized graphene sheets are parallel to one another and parallel to planar direction of integral graphene film and integral graphene film has a length of 1 cm-10000 m, a width of 1 cm-5 m, a thickness of 2 nm-500 mu m, and physical density of 1.5-2.2 g/cm3; (d) optionally compressing the integral graphene film to increase a degree of graphene sheet orientation and physical density, and to improve contact between chemically functionalized graphene sheets; and (e) optionally reducing the non-carbon content to less than or equal to 20 wt.% using chemical, thermal, UV, or radiation unit; and (e) optionally reducing the non-carbon content to less than or equal to 20 wt.% using chemical, thermal, UV, or radiation unit. An INDEPENDENT CLAIM is included for producing an integral graphene film from graphene sheets which involves (a) preparing a graphene dispersion having graphene sheets dispersed in liquid medium; (b) dispensing and depositing a wet film of graphene dispersion onto a supporting substrate, where the dispensing and depositing procedure includes mechanical shear stress-induced alignment of graphene sheets along a film planar direction, and partially or completely removing the liquid medium from film to form a dried graphene film comprising aligned graphene sheets; (c) bringing the dried graphene film in contact with a chemical functionalizing agent to produce a film of chemically functionalized graphene sheets having chemical functional groups attached to and a non-carbon element content of 0.1-47 wt.%; (d) using heat, electromagnetic waves, UV light, and/or high-energy radiation to induce chemical reactions or chemical bonding between chemical functional groups attached to adjacent chemically functionalized graphene sheets to form integral graphene film, where the integral graphene film comprises chemically functionalized graphene sheets that are chemically bonded or interconnected with one another having an inter-planar spacing d002 of 0.36-1.5 nm as determined by X-ray diffraction and non-carbon element content of 0.1-47 wt.%, where functionalized graphene sheets are substantially parallel to one another and parallel to a planar direction of integral graphene film and integral graphene film has a length of 1 cm-10000 m, a width of 1 cm-5 m, thickness of 10 nm-500 m, and physical density of 1.5-2.2 g/cm3; and (d) optionally compressing the integral graphene film to increase a degree of graphene sheet orientation and physical density, and to improve contact between chemically functionalized graphene sheets; and (e) optionally reducing the non-carbon content to less than or equal to 20 wt.% using chemical, thermal, UV, or radiation unit. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the processes for producing conventional paper, mat, film, and membrane of simply aggregated graphite or graphene flakes/platelets.