▎ 摘　　要

NOVELTY - Preparing modified nano-complex material comprises (i) preparing pure graphene graphene-OH having hydroxy group on the surface; (ii) preparing graphene containing hydroxy group on a sulfur-doped surface; (iii) adding gamma -carotene and cis-butadiene anhydride into organic solvent, mixing uniformly, reacting, adding epichlorohydrin and ammonium bromide to reacted mixture, heating, cooling and adding with excess sodium hydroxide chain compound; (iv) preparing sulfur-doped graphene grafted epoxidized gamma -carotene; and (v) preparing sulfur-doped graphene grafted epoxidized gamma -carotene into graphene dispersion, adding drop-wise polycarboxylic acid-based super plasticizer to the graphene dispersion while stirring, and subjecting the mixed solution to ultrasonic treatment, concentrating and spray-drying. USE - The method is useful for preparing modified nano-complex material. ADVANTAGE - The material is economical; has very good durability, new modified nano complex material; and high durability high-way pavement. DETAILED DESCRIPTION - Preparing modified nano-complex material comprises (i) dissolving graphite oxide in water to obtain aqueous graphite oxide solution, adding ammonia water, stirring, naturally cooling the solution to room temperature, cleaning and drying and filtering the precipitate to obtain pure graphene graphene-OH having a hydroxy group on the surface; (ii) dissolving the pure graphene-OH containing hydroxy group in water, mixing with sulfur-containing compound, dispersing and mixing uniformly for 10-25 minutes, hydrothermally reacting at 180-210 degrees C for 8-20 hours, cooling, washing with deionized water to remove excess a sulfur-containing compound to obtain a graphene containing a hydroxy group on a sulfur-doped surface; (iii) adding 22-27 pts. wt. gamma -carotene and 9-11 pts. wt. cis-butadiene anhydride into organic solvent, where the ratio of material to liquid is (31-38): 60g/ml, mixing uniformly, D-A reacting at 130-170 degrees C under nitrogen protecting for 3-5 hours, adding 90-95 pts. wt. epichlorohydrin and 0.6-0.8 pts. wt. ammonium bromide to the reacted mixture, heating the mixture under reflux for 5-7 hours, and cooling to 65-75 degrees C, and adding with excess sodium hydroxide chain compound; (iv) reacting the graphene containing hydroxy group on the sulfur-doped surface with the long-chain compound in a molar ratio of 1: (1-3), where the reaction condition is: one-sixth molar ratio of sodium hydroxide, reacting at 130-170 degrees C for 3-5 hours under nitrogen protection, at the same time, adding 0.1-1 pts. wt. tetrabutylammonium bromide, refluxing for 5-10 hours, cooling to 65-75 degrees C, adding excess sodium hydroxide, washing, concentrating and spray drying to obtain sulfur-doped graphene grafted epoxidized gamma -carotene; and (v) preparing sulfur-doped graphene grafted epoxidized gamma -carotene into a graphene dispersion having a concentration of 0.2-5 mg/ml, and placing required amount of the graphene dispersion in 60-80 degrees C water bath, adding drop-wise the polycarboxylic acid-based super plasticizer to the graphene dispersion while stirring, and subjecting the mixed solution to ultrasonic treatment for 30-60 minutes after being fully reacting, concentrating and spray-drying.