▎ 摘　　要

NOVELTY - Preparation of a high-strength conductive graphene fiber comprises dispersing (pts.wt.) graphene oxide (1) in water (100-1000) by stirring for 1-100 minutes at 1000-10000 revolutions/minute (rpm) to separate and oxidize graphene, dispersing in water, and air drying to obtain a large-size graphene oxide sheet; dissolving sheet (1) in solvent (5-100) to obtain a spinning solution liquid crystal sol; extruding, soaking in a coagulating liquid at 5-80 degrees C, washing, and drying to obtain a graphene oxide fiber; and placing in a reductant to reduce for 0.1-100 hours, washing, and drying. USE - Method for the preparation of a high-strength conductive graphene fiber (claimed) used to weave pure graphene fiber cloth, or functional fabric. ADVANTAGE - The graphene fiber has good electrical conductivity, excellent mechanical property, and good tenacity. The method is inexpensive, is simple, and green and environment-friendly. DETAILED DESCRIPTION - Preparation of a high-strength conductive graphene fiber comprises: (A) mixing (pts.wt.) expanded graphite (1), sulfuric acid (1-100), potassium persulfate (0.5-5), and phosphorus pentoxide (0.5-5), stirring at 25-100 degrees C, reacting for 1-10 hours, cooling to room temperature, diluting with deionized water, extracting with a filter membrane, washing to neutral with deionized water, and air drying for 10-50 hours to obtain an intercalation graphite; (B) mixing intercalation graphite (1), sulfuric acid (1-100), and potassium permanganate (0.5-5), stirring at - 10-50 degrees C, reacting for 0.1-10 hours, adding deionized water (10-2000) and hydrogen peroxide (0.1-10), stirring for 0.1-10 hours, extracting with filter membrane, repeatedly washing to neutral with deionized water, and air drying to obtain a primary graphite oxide; (C) mixing primary graphite oxide (1), sulfuric acid (1-100), and potassium permanganate (0.5-10), stirring at - 10-50 degrees C, reacting for 0.1-10 hours, adding deionized water (10-2000) and hydrogen peroxide (0.1-10), stirring for 0.1-10 hours, extracting with filter membrane, repeatedly washing to neutral with deionized water, and air drying to obtain graphene oxide; (D) dispersing graphene oxide (1) in water (100-1000) by stirring, rotating for 1-100 minutes at 1000-10000 rpm to separate and oxidize graphene, collecting the lower layer centrifugal product, dispersing in water, repeating the centrifugal separation for 1-5 times, and air drying to obtain a large-size graphene oxide sheet; (E) dissolving graphene oxide sheet (1) in solvent (5-100) to obtain a large-size graphene oxide spinning solution liquid crystal sol; (F) extruding graphene oxide spinning solution liquid crystal sol in 5-500 mu m spinning capillary at 100 mL/hour, soaking in a coagulating liquid at 5-80 degrees C 1-100 seconds to coagulate shreds, washing, and drying to obtain a graphene oxide fiber; and (G) placing the graphene oxide fiber in a reductant to reduce for 0.1-100 hours, washing, and drying.