▎ 摘　　要

NOVELTY - Producing graphene-based continuous or long fiber from chemically functionalized graphene sheets, comprises: (a) preparing graphene dispersion having chemically functionalized graphene sheets dispersed in liquid medium; (b) dispensing and depositing at least a continuous or long filament of the graphene dispersion onto 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 to form the long graphene fiber; (d) further comprising optional step of compressing the continuous or long fiber to increase degree of graphene sheet orientation and physical density or to improve contact between chemically functionalized graphene sheets; and (e) further comprising an optional step of reducing the non-carbon content to less than 20 wt.% using chemical, thermal, UV or radiation means. USE - The process is useful for producing a graphene-based continuous or long fiber from chemically functionalized graphene sheets. ADVANTAGE - The process facile is less energy-intensive, simpler and scalable, and cost-effective. DETAILED DESCRIPTION - Producing a graphene-based continuous or long fiber from chemically functionalized graphene sheets, comprises: (a) preparing a graphene dispersion having chemically functionalized graphene sheets dispersed in a liquid medium, where the chemically functionalized graphene sheets contain chemical functional groups attached thereto and a non-carbon element content of 0.1-47 wt.%; (b) dispensing and depositing at least a continuous or long filament of the graphene dispersion onto a supporting substrate, where the dispensing and depositing procedure includes mechanical shear stress-induced alignment of the chemically functionalized graphene sheets along a filament axis direction, and partially or completely removing the liquid medium from the filament to form a continuous or long fiber 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 to form the long graphene fiber, where the continuous or long graphene fiber comprises chemically functionalized graphene sheets that are chemically bonded with one another having an inter-planar spacing d002 of 0.36-1.5 nm as determined by X-ray diffraction and a non-carbon element content of 0.1-47 wt.% and the functionalized graphene sheets contain a combination of sp2 and sp3 electronic configurations, are substantially parallel to one another and parallel to a fiber axis direction, and the fiber contains no core-shell structure, have no helically arranged graphene domains, and have a length no less than 0.5 cm and a physical density of 1.5-2.2 g/cm3; (d) further comprising an optional step of compressing the continuous or long fiber to increase a degree of graphene sheet orientation and physical density or to improve contact between chemically functionalized graphene sheets; and (e) further comprising an optional step of reducing the non-carbon content to less than 20 wt.% using chemical, thermal, UV or radiation means.