▎ 摘　　要

NOVELTY - Esterified monomer, which is prepared from allyl polyethylene glycol and 2,2':6',2"-terpyridine-4-formic acid through esterification reaction, where the molecular weight of allyl polyethylene glycol is 1000-2500, and the mass ratio of allyl polyethylene glycol and 2,2':6',2"-terpyridine-4-formic acid is 4-6:1-1.5, is claimed. USE - Used as esterified monomer. ADVANTAGE - The water-reducing agent: has excellent adaptability and small concrete slump loss, and has special metal complex structure which endows excellent electrical conductivity. The graphene dispersion slurry: has strong stability, and excellent electrical conductivity and slump-retaining properties. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: a conductive slump-retaining graphene dispersion slurry, which is prepared by mixing graphene, conductive slump-retaining polycarboxylic acid water-reducing agent and deionized water. (1) preparing the esterified monomer, comprising placing allyl polyethylene glycol, 2,2':6',2"-terpyridine-4-formic acid, concentrated sulfuric acid and polymerization inhibitor in a reactor containing toluene, performing temperature constant reaction at 100-110degrees Celsius for 3-6 hours, and distilling toluene under reduced pressure to obtain an esterified monomer; (2) a ligand, which is formed by free radical polymerization of isopentenyl polyoxyethylene ether, esterified monomer, unsaturated monocarboxylic acid, unsaturated ester and polyethylene glycol ester, where the molecular weight of the isopentenyl polyoxyethylene ether is 2500-3500, the molecular weight of the polyethylene glycol ester is 200-1000, and the mass ratio of the isopentenyl polyoxyethylene ether, esterified monomer, unsaturated monocarboxylic acid, unsaturated ester and polyethylene glycol ester is 13-14:3-4:8.4-9.8:2.5-3:1-2; (3) preparing the ligand, comprising (i) mixing 0.3-0.4 pts. wt. reducing agent, 0.5-0.6 pts. wt. chain transfer agent and 30 pts. wt. deionized water to obtain solution A, and uniformly mixing 25-30 pts. wt. unsaturated ester and 80-90 pts. wt. unsaturated monocarboxylic acid, and (ii) adding 130-140 pts. wt. isopentenyl polyoxyethylene ether, 10-20 pts. wt. polyethylene glycol ester, 30-40 pts. wt. esterification monomer and 200 pts. wt. deionized water into the reactor, stirring and heating to 35-45degrees Celsius, adding 4-8 pts. wt. unsaturated monocarboxylic acid and 1.8-2 pts. wt. oxidant, stirring for 5 minutes, dripping the solution A at a uniform speed for 2-2.5 hours, dripping the solution A for 1-2 minutes, and dripping the solution B at a constant speed for 2.5-3 hours, continuously performing the constant temperature reaction for 1-1.5 hours, and adjusting the pH to 6-7 to obtain finished product; (4) a conductive slump-retaining polycarboxylic acid water-reducing agent prepared by the reaction of the ligand and zinc nitrate solution, where the mass ratio of the zinc nitrate and ligand is 7.5-8.5:510-570; (5) preparing the conductive slump-retaining polycarboxylic acid water-reducing agent, comprising taking 7.5-8.5 pts. wt. zinc nitrate in the reaction container, adding 20 pts. wt. deionized water to dissolve, moving to another reaction container and stirring, dripping 510-570 pts. wt. ligand into nitric acid at a uniform speed within 5-10 minutes in zinc solution, and adding deionized water to adjust the solid content to 50% to obtain finished product; and