▎ 摘　　要

NOVELTY - Graphene fiber sheet comprises 30-50 pts. wt. plant fiber, 20-40 pts. wt. graphene loaded with negative ion portion, 20-35 pts. wt. crushed straw, 13-25 pts. wt. aldehyde-free modified soybean gum, 12-18 pts. wt. titanium dioxide, 15-25 pts. wt. magnesium oxide, 20-33 pts. wt. magnesium chloride, 18-30 pts. wt. magnesium sulfide and 2-16 pts. wt. iron tourmaline. USE - As graphene fiber sheet. ADVANTAGE - The graphene fiber sheet improves the interface compatibility, has excellent mechanical properties and no harmful substances volatilize, purifies the air, cooperates with diatom mud, removes toxic substances in the air, is environmentally-friendly, increases their medicinal health care, has no heavy metals, chemical substance pollution, variety of properties integrated, excellent performance, and extended service life, and is uniform and suitable for industrial production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the graphene fiber sheet involving (i) mixing 20-40 pts. wt. graphene loaded with negative ion portion, 5-15 pts. wt. nano-scale calcium carbonate particles and 5-10 pts. wt. dopamine aqueous solution, uniformly mixing and stirring, soaking within 30 minutes, shaking at constant temperature for 10-35 minutes, filtering and drying to obtain a graphene mixture loaded with anion portion, (ii) using 20-33 pts. wt. magnesium chloride to prepare a magnesium chloride solution, and immersing 30-50 pts. wt. plant fibers in the magnesium chloride solution to prepare a fiber composition, (iii) combining the graphene mixture with negative ion portion obtained in the step (i), the fiber composition obtained in the step (ii), 20-35 pts. wt. straw pulverized material, 13-25 pts. wt. aldehyde-free modified soybean gum, 12-18 pts. wt. titanium dioxide, 10-28 pts. wt. diatom mud and 2-16 pts. wt. iron tourmaline, evenly mixing, adding them to the screw extruder for extrusion molding, and (iv) subjecting the product obtained in the step (iii) to hot press molding, and cooling to obtain the desired graphene fiber sheet.