▎ 摘　　要

NOVELTY - Anti-mud early-strength functional monomer, is claimed. The anti-mud early-strength functional monomer prepared by grafting a silane coupling agent after non-covalent modification of graphene oxide and quaternary ammonium salt. USE - Used as anti-mud early-strength functional monomer. ADVANTAGE - The functional monomer: has simple and convenient preparation process and strong popularization value; and ensures excellent water reducing performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a preparing the anti-mud early strength functional monomer comprising mixing graphene oxide, quaternary ammonium salt and water, uniformly dispersing, stirring, adding absolute ethyl alcohol, adjusting the pH value of the solution, adding a silane coupling agent and performing water bath prehydrolysis, and then heating in a water bath, stirring and cooling to room temperature, filtering, washing with a 1:1 ethanol aqueoussolution and drying to obtain the product. (2) a anti-mud early strength function polycarboxylic acid water reducing agent comprising a polyether macromonomer, polyoxyethylene polyoxypropylene block polyether, unsaturated acid, anti-mud early-strength functional monomer, an unsaturated small monomer A and an unsaturated small monomer B. The unsaturated small monomer A is sulfobetaine. The unsaturated small monomer B is unsaturated amide and derivatives. (3) a preparing the anti-mud early strength function polycarboxylic acid water reducing agent comprising mixing a polyether macromonomer, polyoxyethylene polyoxypropylene block polyether, an anti-mud early strength functional monomer, an initiator and water, uniformly dispersing, then transferring into a reaction container, stirring and heating until the mixture is completely dissolved, simultaneously dropwise adding a mixed solution A (a mixed solution of a chain transfer agent, a reducing agent and water) and a mixed solution B (a mixed solution of unsaturated acid, an unsaturated small monomer A, an unsaturated small monomer B and water), and after the dropwise adding is finished, keeping the temperature, adjusting the pH value and supplementing water to obtain the final product.