The invention relates to the field of polycarboxylic 
acid water reducing agents, and provides an esterified 
monomer, a ligand and a conductive 
slump-retaining polycarboxylic 
acid water reducer, preparation methods thereof, and a conductive 
slump-retaining 
graphene dispersion 
slurry. The esterified 
monomer is prepared from allyl 
polyethylene glycol and 2, 2': 6', 2'-
terpyridine-4-
formic acid through an 
esterification reaction. The ligand is formed by polymerizing isopentenyl 
polyoxyethylene ether, the esterified 
monomer, unsaturated monocarboxylic acid, unsaturated ester and 
macrogol ester free radicals. The conductive 
slump-retaining polycarboxylic 
acid water reducer is prepared by reacting a ligand with a 
zinc nitrate solution. The conductive slump-retaining 
graphene dispersion 
slurry is prepared by mixing 
graphene, the conductive slump-retaining polycarboxylic acid 
water reducer and deionized water. The prepared polycarboxylic acid 
water reducer is good in adaptability, the slump loss of concrete is small, the special 
metal complexing structure of the polycarboxylic acid 
water reducer endows the polycarboxylic acid water 
reducer with excellent 
conductivity, and conductive slump-retaining graphene dispersion 
slurry prepared by compounding the polycarboxylic acid water reducer with graphene is high in stability and has excellent 
conductivity and slump-retaining performance.