CN-119591344-B - Additive for capacitor concrete and preparation method thereof

CN119591344BCN 119591344 BCN119591344 BCN 119591344BCN-119591344-B

Abstract

The invention discloses an additive for capacitor concrete and a preparation method thereof, and belongs to the technical field of concrete additives. The additive for the capacitor concrete comprises the following raw materials of conductive polycarboxylate water reducer, composite defoamer and water, wherein the conductive polycarboxylate water reducer comprises polyhydroxy polyaniline, methallyl alcohol polyoxyethylene ether, unsaturated carboxylic acid monomer, 2-acrylamide-2-methylpropanesulfonic acid, chain transfer agent, reducing agent, oxidant, cross-linking agent and water, and the composite defoamer comprises glycerol polyether, tributyl phosphate and water. The invention also discloses a preparation method of the additive for capacitor concrete. The additive for capacitor concrete can effectively disperse conductive materials such as carbon black and the like by means of electrostatic adsorption and steric hindrance effect of the conductive polycarboxylate water reducer, avoid agglomeration of the conductive materials, and further promote enhancement of conductive performance of the capacitor concrete in the process of preparing the capacitor concrete.

Inventors

BI YAO
SHAN HAILIN
SHANG JIAQI
NIU DEMIN
CHEN JING
YAN SHENGDONG
WANG JUN
WANG SHAOFENG
WANG JINWEN
LIU WENKANG
YANG JIYU
YIN YI

Assignees

中建西部建设新材料科技有限公司
中建西部建设股份有限公司

Dates

Publication Date: 20260512
Application Date: 20241203

Claims (7)

1. The additive for the capacitor concrete is characterized by comprising the following raw materials, by weight, 20-25 parts of a conductive polycarboxylate water reducer, 1 part of a composite defoamer and 70-80 parts of water; The conductive polycarboxylate water reducer comprises, by weight, 15-25 parts of polyhydroxy polyaniline, 300-360 parts of methylallyl alcohol polyoxyethylene ether, 20-30 parts of unsaturated carboxylic acid monomers, 10-15 parts of 2-acrylamide-2-methylpropanesulfonic acid, 0.9-1.4 parts of chain transfer agent, 0.6-0.8 part of reducing agent, 1.2-1.6 parts of oxidant, 0.1-0.12 part of cross-linking agent and 350-400 parts of water; the composite defoamer comprises the following raw materials, by weight, 1-3 parts of glycerolyether, 1-2 parts of tributyl phosphate and 12-20 parts of water; the unsaturated carboxylic acid monomer is at least one of acrylic acid, methacrylic acid and itaconic acid, and the glycerol polyether is at least one of polyoxypropylene glycerol polyether and polyoxyethylene glycerol polyether.
2. The additive for capacitor concrete according to claim 1, wherein the molecular weight of the polyhydroxypolyaniline is 500 to 1500, and the molecular weight of the methallyl alcohol polyoxyethylene ether is 400 to 1200.
3. The additive for capacitor concrete as claimed in claim 1, wherein the chain transfer agent is sodium hypophosphite, mercaptoethanol, mercaptoacetic acid or mercaptopropionic acid.
4. The additive for capacitor concrete according to claim 1, wherein the reducing agent is ascorbic acid, E51 or sodium silicate, the oxidizing agent is ammonium persulfate, potassium persulfate or hydrogen peroxide, and the crosslinking agent is N, N-methylenebisacrylamide, silane coupling agent KH-550, isocyanate or ethylene glycol dimethacrylate.
5. The method for preparing the additive for capacitor concrete according to any one of claims 1 to 4, comprising the steps of: (1) Uniformly mixing polyhydroxy polyaniline, methallyl alcohol polyoxyethylene ether and water, and heating to obtain a solution A; (2) Uniformly mixing unsaturated carboxylic acid monomer, 2-acrylamide-2-methylpropanesulfonic acid, chain transfer agent and water to obtain solution B; (3) Uniformly mixing a reducing agent and water to obtain a solution C; (4) Adding an oxidant into the solution A, dropwise adding the solution B and the solution C, adding a cross-linking agent after the dropwise adding is finished, stirring and preserving heat to obtain the conductive polycarboxylate water reducer; (5) Uniformly mixing glycerol polyether, tributyl phosphate and water to obtain a compound defoamer; (6) And uniformly mixing the conductive polycarboxylate water reducer, the composite defoamer and water to obtain the additive for the capacitor concrete.
6. The method of producing an admixture for capacitor concrete according to claim 5, wherein the heating in the step (1) is performed to a temperature of 30 to 50 ℃.
7. The method for preparing the additive for capacitor concrete according to claim 5, wherein the time for dropwise adding the solution B and the solution C in the step (4) is 50-90 min, the temperature for stirring and heat preservation is 30-50 ℃ and the time is 30-60 min.

Description

Additive for capacitor concrete and preparation method thereof Technical Field The invention belongs to the technical field of concrete additives, and particularly relates to an additive for capacitor concrete and a preparation method thereof. Background The concrete capacitor is used as a novel energy storage technology, and the integration of a building structure and energy storage is realized by introducing substances such as high-conductivity carbon black and the like into a traditional concrete material to form an internal intercommunicating conductive network structure. The concrete capacitor provides an energy storage solution with strong environmental adaptability and long cycle life by utilizing the wide applicability and durability of concrete, and the energy storage capacity can be linearly expanded by adjusting the electrode volume, so that the energy storage capacitor is suitable for multiple fields of intelligent building, infrastructure, renewable energy storage and the like, and has remarkable cost benefit and application potential. However, porous conductive media such as carbon black with good conductivity are easy to aggregate and difficult to disperse, and simultaneously, a large amount of fine aggregates such as carbon black with micron or nano-scale size are introduced, so that the water demand of the capacitor concrete is further increased, the conductive performance and the mechanical performance of the capacitor concrete are directly affected, and the conductive efficiency of the capacitor concrete is further improved under the condition that the durability of the concrete is not reduced, so that the capacitor concrete becomes a difficult problem for limiting the application of the concrete capacitor. Disclosure of Invention The invention aims to solve the problem of providing the additive for the capacitor concrete and the preparation method thereof, and the capacitor concrete prepared by adopting the additive has good conductive property and mechanical property. The technical scheme adopted for solving the technical problems is that the additive for capacitor concrete comprises the following raw materials, by weight, 20-30 parts of conductive polycarboxylate water reducer, 1-2 parts of composite defoamer and 30-80 parts of water; The conductive polycarboxylate water reducer comprises, by weight, 10-30 parts of polyhydroxy polyaniline, 200-400 parts of methylallyl alcohol polyoxyethylene ether, 10-30 parts of unsaturated carboxylic acid monomer, 10-20 parts of 2-acrylamide-2-methylpropanesulfonic acid, 0.6-1.5 parts of chain transfer agent, 0.2-1.0 part of reducing agent, 1-2 parts of oxidizing agent, 0.1-0.3 part of cross-linking agent and 350-750 parts of water; the composite defoamer comprises the following raw materials, by weight, 1-4 parts of glycerolyether, 1-4 parts of tributyl phosphate and 10-20 parts of water. The capacitor concrete has the beneficial effects that the capacitor concrete forms the capacitor main body part by concrete, the inside of the capacitor concrete is mainly conductive by carbon black, graphite and the like, and the agglomeration of the materials has great influence on the overall conductivity of the capacitor. The invention uses polyhydroxy polyaniline, methallyl alcohol polyoxyethylene ether, 2-acrylamide-2-methylpropanesulfonic acid, unsaturated carboxylic acid monomer and the like to polymerize to form conjugated pi electron structure to strengthen conductive performance, and simultaneously disperses conductive particles such as carbon black and cement particles by means of electrostatic adsorption and steric hindrance effect of the conductive polycarboxylic acid water reducer to strengthen uniformity and conductivity of concrete, forms longer-size rigid branched chains by means of polyhydroxy polyaniline, increases steric hindrance of the water reducer by means of micro-crosslinking, reduces intercalation effect of the water reducer in interlayer structures of materials such as carbon black and the like, further improves dispersion capacity, and simultaneously strengthens conductive performance. Preferably, 20-25 parts of conductive polycarboxylate superplasticizer, 1 part of composite defoamer and 70-80 parts of water; The conductive polycarboxylate water reducer comprises, by weight, 15-25 parts of polyhydroxy polyaniline, 300-360 parts of methylallyl alcohol polyoxyethylene ether, 20-30 parts of unsaturated carboxylic acid monomers, 10-15 parts of 2-acrylamide-2-methylpropanesulfonic acid, 0.9-1.4 parts of chain transfer agent, 0.6-0.8 part of reducing agent, 1.2-1.6 parts of oxidizing agent, 0.1-0.12 part of cross-linking agent and 350-400 parts of water; the composite defoamer comprises the following raw materials, by weight, 1-3 parts of glycerolyether, 1-2 parts of tributyl phosphate and 12-20 parts of water. More preferably, 25 parts of conductive polycarboxylate superplasticizer, 1 part of composite defoamer and 74 parts of water; The