▎ 摘　　要

NOVELTY - Graphene composite fiber (1) comprises: 1-10 wt.% many graphene sheets (10), where each graphene sheet is formed of n number (i.e. greater than 1 to less than 1000) of graphene layers stacked, the graphene sheet comprises at least one modified layer on surface of graphene sheet, and the modified layer comprises first organic functional groups for forming chemical bonds with graphene layers, and second organic functional groups; and a polymer material (20) that is a thermoplastic polymer for enclosing graphene sheets and forming chemical bonds with second organic functional groups. USE - The graphene composite fiber is useful in military, energy and entertainment industries. ADVANTAGE - The graphene composite fiber: has an electrical conductivity of 10-4 to 102 S/cm, and a tensile strength of larger than 100 MPa (claimed); can be manufactured by using traditional weaving method with simple processes, hence reduces the manufacturing cost, and replaces the high performance carbon fiber commonly used in the military, energy and entertainment industries; and exhibits excellent mechanical strength, thermal conductivity and electrical conductivity. DETAILED DESCRIPTION - Graphene composite fiber (1) comprises: 1-10 wt.% many graphene sheets (10), where each graphene sheet is formed of n number (i.e. greater than 1 to less than 1000) of graphene layers stacked, the graphene sheet comprises at least one modified layer on a surface of the graphene sheet, and the modified layer comprises first organic functional groups for forming chemical bonds with the graphene layers, and second organic functional groups; and a polymer material (20) that is a thermoplastic polymer for enclosing the graphene sheets and forming chemical bonds with the second organic functional groups, where and the graphene sheets are aligned in parallel with an axis of the graphene composite fiber. An INDEPENDENT CLAIM is also included for manufacturing the graphene composite fibers, comprising: preparing the graphene sheets; a step of surface modifying by using a surface modifying agent to modify a surface of the graphene sheet to form at least one modified layer for forming the graphene sheets with modified surfaces, where the surface modifying agent comprises the first organic functional group and the second organic functional group provided on the surface of the graphene sheet; a step of blending by adding the graphene sheets with modified surfaces into a polymer material melted for blending, so that the graphene sheets with modified surfaces and the polymer material are blended, the second organic functional group forms chemical bonds with the polymer material, and the graphene sheets with modified surfaces are present at 1-10 wt.%; a step of forming raw particles by using a granulator to process the blended graphene sheets and the polymer material for forming graphene-polymer composite raw particles; and a step of spinning by spinning the graphene-polymer composite raw particles to form many graphene composite fibers. DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the graphene composite fiber. Graphene composite fiber (1) Graphene sheets (10) Polymer material (20)