Anticorrosion and antibacterial polycarboxylate water reducer loaded with nano silver and preparation method thereof

Abstract

The invention belongs to the technical field of concrete admixtures, and discloses an antiseptic and antibacterial polycarboxylate water reducer loaded with nano-silver and a preparation method thereof. The water reducer components include: 0.5-2 parts of silver compound, 1 ~2 parts, 1‑(3‑dimethylaminopropyl)‑3‑ethylcarbodiimide 0.1~0.3 parts, polyether macromonomer 10~50 parts, vinyl monomer 2~10 parts, Initiator 0.05~1 part and the rest is water. In the present invention, the silver compound, graphene oxide and polycarboxylate water reducer are connected by covalent bonds, which fundamentally solves the problem of agglomeration of nano-silver and graphene oxide. The nano-silver introduced in the product has anti-corrosion / antibacterial effect and can Significantly improve the anti-corrosion and anti-bacterial ability of polycarboxylate superplasticizer, and solve the problem of easy breeding of bacteria and microorganisms on the surface of marine or hydraulic concrete, and improve its durability and service life.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, in particular to an antiseptic and antibacterial polycarboxylate water reducer loaded with nano silver and a preparation method thereof. Background technique [0002] Polycarboxylate superplasticizer is an admixture used in cement-based materials, which can significantly improve the working performance, mechanical properties and durability of cement-based materials, and has become an indispensable component in concrete. Some researchers have pointed out that polycarboxylate superplasticizers have a comb structure, and based on the designability of their molecular structure, some functional monomers or structures can be introduced to give polycarboxylate superplasticizers more new functions, such as improving concrete. Early strength, reducing the construction viscosity of concrete, reducing the air content of concrete and other properties. At present, polycarboxylate superplasticizer...

AI Technical Summary

Problems solved by technology

However, the method of grafting antiseptic and antibacterial monomers such as quaternary ammonium salt, guanidine salt and imidazolium salt on the main chain of polycarboxylate water reducer, due to the poor antibacterial effect of the quaternary ammonium salt side chain, the functions of guanidine salt and imidazolium salt The group polymerization reaction process is complicated, and functional monomers such as quaternary ammonium salt, guanidine salt and imidazolium salt are used in a large amount and the cost is high, which are not suitable for anti-corrosion of polycarboxylate superplasticizers.

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