Esterified monomer, ligand and conductive slump-retaining polycarboxylic acid water reducer, preparation methods thereof, and conductive slump-retaining graphene dispersion slurry

Abstract

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.

Description

technical field [0001] The invention relates to the field of polycarboxylate water-reducers, in particular to an esterified monomer, a ligand, a conductive slump-retaining polycarboxylate water-reducer, a preparation method thereof, and a conductive slump-retaining graphene dispersion slurry. Background technique [0002] In recent years, with the increasing demand for construction concrete, there are high requirements for admixtures that must be added to concrete, especially in recent years. Development in the direction of environmental protection, high water reduction, high slump retention, and better adaptability to concrete floors. Polycarboxylate superplasticizer is widely used because of its low dosage, high water reducing rate, low concrete shrinkage, and environmental protection. It is called the third generation of high-performance superplasticizer. As the country continues to vigorously develop infrastructure and the requirements for concrete are getting higher an...

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Problems solved by technology

[0008] The master's thesis "Research on the Electrothermal Performance of CSG Conductive Concrete" (Author: Xie Xin; Supervisor: Wang Ruiyan. Chongqing Jiaotong University, June 16, 2016) discloses a CSG conductive concrete, which uses polycarboxylic acid with high slump The water agent realizes the slump-preserving function, and carbon fiber, steel fiber and graphite are added to realize the conductive function, but the concrete of this invention is composed of conductive materials and slump-preserving water-reducing agents. Since the water-reducing agent is not conductive, the conductive materials are dispersed in the concrete and The probability of contact conductivity is not high

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