▎ 摘　　要

NOVELTY - Preparing graphene composite paper with high-strength and high-conductivity synthetic fiber comprises (i) preparing synthetic fiber dispersant, where the synthetic fiber dispersant is dispersant 1, dispersant 2 or dispersant 3, (ii) dispersing synthetic fibers, water and synthetic fiber dispersant through a disintegrator to obtain synthetic fiber slurry, (iii) mixing the graphene slurry with the synthetic fiber slurry, adding a cation retention agent, and stirring uniformly to obtain a composite slurry, and (iv) forming the composite slurry by wet papermaking technology, drying, and hot pressing. The cationic polymer additive is a cationic polyacrylamide with a molecular weight of 1-2 million, polyethyleneimine with a molecular weight of 1-2 million, cationic guar gum with a molecular weight of 1-2 million or polyamide epichlorohydrin resin with a molecular weight of 100000-200000, and the anionic polymer additives are carboxymethyl cellulose. USE - The method is useful for preparing graphene composite paper with high-strength and high-conductivity synthetic fiber. ADVANTAGE - The composite paper has good uniformity high strength and good conductivity. The method is economical and has fast dispersion uniform dispersion little water. DETAILED DESCRIPTION - Preparing graphene composite paper with high-strength and high-conductivity synthetic fiber comprises (i) preparing synthetic fiber dispersant, where the synthetic fiber dispersant is dispersant 1, dispersant 2 or dispersant 3, where the dispersant 1 is prepared by taking dilute acid to dissolve chitosan to obtain a chitosan solution, dropping add dilute alkali solution until the pH of the system is 7-9 to obtain chitosan precipitation, washing the precipitate to neutrality and dispersing in water, the preparation of dispersant 2 comprises performing high-concentration beating of pulp fibers with a beating degree of 50-70degreesSR, adding water-soluble cationic polymer additives and anion polymer additives, and stirring for 5-15 minutes, the preparation of dispersant 3 comprises adding water-soluble cationic polymer additives or metal salts into the aqueous dispersion of nanocellulose, and stirring for 3-5 minutes, (ii) dispersing synthetic fibers, water and synthetic fiber dispersant through a disintegrator to obtain synthetic fiber slurry, (iii) mixing the graphene slurry with the synthetic fiber slurry, adding a cation retention agent, and stirring uniformly to obtain a composite slurry, and (iv) forming the composite slurry by wet papermaking technology, drying, and hot pressing. The cationic polymer additive is a cationic polyacrylamide with a molecular weight of 1-2 million, polyethyleneimine with a molecular weight of 1- 2 million, cationic guar gum with a molecular weight of 1-2 million or polyamide epichlorohydrin resin with a molecular weight of 100000-200000, the anionic polymer additives are carboxymethyl cellulose with a molecular weight of 200000-300000 or anionic polyacrylamide with a molecular weight of 100-200 million, the water-soluble cationic polymer additive is a cationic polyacrylamide with a molecular weight of 100000-200000, the polyethyleneimine with molecular weight 100000-200000 or polyamide epichlorohydrin resin with molecular weight 100000-200000 and the metal salt is a salt containing a metal ion, and the metal ion is a trivalent iron ion or a trivalent aluminum ion. An INDEPENDENT CLAIM is also included for composite paper prepared by the above mentioned method.