Antibacterial polycarboxylate superplasticizer and preparation method thereof

Abstract

The invention belongs to the field of polycarboxylate superplasticizers for cement concrete, and relates to an antibacterial polycarboxylate superplasticizer and a preparation method thereof. The existing water reducing agent can generate bacteria during transportation, and the water reducing agent in the prior art is either high in cost or pollutes the environment. The invention provides an antibacterial polycarboxylate superplasticizer and a preparation method thereof, and the specific method comprises the following steps: (1) preparing an unsaturated monomer containing 1, 2, 3-triazole through an azidation reaction, a 1, 3-dipolar cycloaddition reaction and a Williamson etherification reaction / acylation reaction; and (2) carrying out free radical polymerization on unsaturated monomers containing 1, 2, 3-triazole, carbonyl-containing unsaturated acid and derivative monomers thereof, and unsaturated polyether macromonomers or unsaturated ester macromonomers under the combined action of an initiator, a reducing agent and a reducing agent to prepare a copolymerization product. The water reducing agent prepared by adopting the method is an antibacterial polycarboxylic acid water reducing agent, and the product is non-toxic, pollution-free, stable in performance and suitable for long-term and high-temperature storage.

Description

technical field [0001] The invention belongs to the field of polycarboxylate water reducer for cement concrete, and relates to an antibacterial polycarboxylate water reducer and a preparation method thereof. Background technique [0002] Polycarboxylate high-performance water reducer is the third generation of cement concrete water reducer after the ordinary water reducer represented by calcium lignosulfonate and the high-efficiency water reducer represented by naphthalene series, and has been widely used Used in projects such as railways, airports and bridges. With the increasing demand for high-performance concrete, many problems have been exposed in storage and transportation, such as transportation or storage in places with high temperatures, which will cause some bacteria or fungi to damage the water reducing agent. Erosion, coupled with the water reducer mother liquor is usually compounded with small materials such as white sugar or sodium glucocarbonate, which furthe...

AI Technical Summary

Problems solved by technology

The publication date is February 16, 2018, the publication number is CN107698721A, and the patent titled "A branched-chain antibacterial polycarboxylate water reducer, its preparation method and application" reports a branched-chain antibacterial polycarboxylate Acid water reducer, which utilizes the formation of imidazolium salt on the branched chain to play an antibacterial effect, but the large amount of functional monomers used and the high cost limit its use

The publication date is May 15, 2020, the publication number is CN111153625A, and the patent name is "An anti-corrosion and antibacterial polycarboxylate water reducer loaded with nano-silver and its preparation method", which proposes a anti-corrosion agent loaded with nano-silver. The preparation method of antibacterial polycarboxylate water reducer, the synthesized water reducer has good initial dispersion and retention effect, and the antibacterial performance is also strong, suitable for marine or hydraulic concrete, but because silver ions will be continuously released It will cause certain pollution to the environment, which also limits its use.

Images