Graphene oxide composite polycarboxylate water reducer and preparation method thereof

Abstract

The invention discloses a graphene oxide composite polycarboxylate water reducer, which is characterized by being prepared from the following raw materials and ingredients in percentage by mass: 0.1 to 2 percent of graphene oxide, 25 to 40 percent of methyl allyl polyethenoxy ether, 1.5 to 4 percent of acrylic acid, 2 to 5.4 percent of maleic anhydride, 50 to 70 percent of water, 0.4 to 1 percent of oxidizing agent of ammonium persulfate and 0.1 to 0.2 percent of reducing agent of sodium hydrosulfite. The monomer methyl allyl polyethenoxy ether, the acrylic acid, the maleic anhydride and the graphene oxide are uniformly mixed and take polymerization reaction under the initiation effect of the oxidizing agent and the reducing agent, so that the graphene oxide composite polycarboxylate water reducer is obtained. The graphene oxide composite polycarboxylate water reducer has the advantages that the dispersibility of the graphene oxide in concrete application can be effectively improved; under the condition of achieving the same intensity improving effect, the consumption of the graphene oxide in the concrete application can be reduced; the mechanical property of concrete is further improved.

Description

technical field [0001] The invention relates to a graphene oxide composite polycarboxylate water reducer and a preparation method thereof, belonging to the field of chemical industry. Background technique [0002] High-performance concrete that resists harsh environments or ultra-high strength is required in some constructions with special requirements, such as high-rise buildings, underground engineering, long-span bridges, and marine facilities. The construction of these concrete projects is difficult, the use environment is harsh, and maintenance is difficult. Therefore, the concrete is required not only to have good construction performance, but also to avoid defects during pouring, and to have good durability and long service life. As a chemical admixture in the concrete preparation process, polycarboxylate superplasticizer has greatly promoted the high performance of concrete. [0003] Polycarboxylate superplasticizer is a long-chain polymer, which is produced by poly...

AI Technical Summary

Problems solved by technology

However, this method still has the problem that the dispersion of graphene oxide is not uniform enough, and the ultrasonic process may destroy the long-chain molecular structure of the water reducer, especially when the main chain contains quaternary carbon atoms, thereby affecting the performance of the water reducer

Images