▎ 摘　　要

NOVELTY - A carbon fiber composite material comprises 30-35 pts. wt. graphene modified phenolic resin, 3-5 pts. wt. carbon fiber board, 4-6 pts. wt. hexamethylenetetramine, 10-15 pts. wt. wollastonite, 2-4 pts. wt. carbon black and 1-2 pts. wt. calcium hydroxide. The carbon fiber composite material is prepared by mixing phenol, formaldehyde, and zinc oxide in mass ratio of 45-55:45-55:1-1.2, adding to four-necked flask containing condensed water, reacting, dehydrating under vacuum condition, using methanol to adjust viscosity, cooling to obtain phenolic resin, dispersing graphene in phenolic resin in mass ratio of 2:3, adding to four-necked flask containing condenser, adding oxalic acid as catalyst, reacting and dehydrating, cooling and grinding to obtain graphene-modified phenolic resin, adding graphene-modified phenolic resin, coated carbon fiber board, hexamethylenetetramine, wollastonite, carbon black, and calcium hydroxide to mixer, mixing, drying, adding to open mill and plasticizing. USE - Carbon fiber composite material used for helicopter main rotor wings. ADVANTAGE - The carbon fiber composite material has tensile strength of 90-95 MPa, and effectively improves the tensile strength of whole product according to stand GB/T 312902014. DETAILED DESCRIPTION - A carbon fiber composite material comprises 30-35 pts. wt. graphene modified phenolic resin, 3-5 pts. wt. carbon fiber board, 4-6 pts. wt. hexamethylenetetramine, 10-15 pts. wt. wollastonite, 2-4 pts. wt. carbon black and 1-2 pts. wt. calcium hydroxide. The carbon fiber composite material is prepared by (1) placing carbon fiber board in opening on the side of the upper coating chamber and lower coating chamber in the coating equipment, moving two lifting shells towards each other, conveying roller on lifting shell is in contact with the surface of the carbon fiber board, storing pre-cured product in storage cavity and passing to shunt pipe and spray head, spraying the pre-cured product in shunt pipe on surface of coating belt, so that coating belt coats the surface of the pre-cured product on the surface of the conveyor roller, using conveying roller to coat the pre-cured product on the surface of the carbon fiber board while conveying the carbon fiber board, taking out the carbon fiber board from the other side of the upper coating chamber and lower coating chamber, (2) mixing phenol, formaldehyde, and zinc oxide in mass ratio of 45-55:45-55:1-1.2, adding to four-necked flask containing condensed water, reacting, dehydrating under vacuum condition until the moisture content is less than 4%, using methanol to adjust the viscosity, cooling to below 38 degrees C to obtain phenolic resin, (3) dispersing graphene in phenolic resin in mass ratio of 2:3, adding to four-necked flask containing condenser, adding oxalic acid as catalyst, reacting and dehydrating, cooling and grinding to obtain graphene-modified phenolic resin, and (4) adding graphene-modified phenolic resin, coated carbon fiber board, hexamethylenetetramine, wollastonite, carbon black, and calcium hydroxide to mixer, mixing, placing in oven, drying, adding to open mill and plasticizing. An INDEPENDENT CLAIM is included for preparation of the carbon fiber composite material.