Optimization of Microwave Radiation Preparation of Polycarboxylate Superplasticizer by Response Surface Methodology

Abstract

The invention discloses a method for preparing polycarboxylate water-reducer by optimizing microwave radiation by response surface method. It uses allyl alcohol polyoxyethylene ether and sodium methacrylene sulfonate as raw materials and mixes them uniformly with water. Heat to the reaction temperature, then add acrylic acid and ammonium persulfate at constant temperature to react for a period of time, use the response surface method to set the variable parameters of the reaction, cool down after the reaction, adjust the pH, and obtain the polycarboxylate superplasticizer. On the basis of single factor analysis, the present invention uses the response surface method to optimize the synthesis process of polycarboxylate water reducer, and obtains the process conditions that are more suitable for preparing polycarboxylate water reducer, aiming at the development and promotion of high-efficiency water reducer Provide a basis for scientific experiments.

Description

technical field [0001] The invention belongs to the field of preparation of water reducers, and in particular relates to a method for preparing polycarboxylate water reducers by optimizing microwave radiation with a response surface method. Background technique [0002] As the fourth generation of high-efficiency water reducer, polycarboxylate water reducer has the advantages of small dosage, high water reducing rate and low slump, and is widely used in the preparation of high performance concrete. At present, the mechanism of action of polycarboxylate superplasticizers has been deeply and systematically studied, so how to prepare high-performance polycarboxylate superplasticizers through effective molecular structure functional design and scientific and effective process optimization experiments on the basis of simple process and wide range of raw materials Acid water reducer will have important practical significance. [0003] According to the action mechanism of water re...

AI Technical Summary

Problems solved by technology

At present, in the development of high-efficiency water reducers, such as CN201210274917.1, the orthogonal experiment method is used to screen out the significant factors affecting the index and give the best factor level combination, but it is impossible to find the best combination of factors in the entire area And the shortcomings of the response value, and mostly use the linear model, there are deviations from the actual situation, the accuracy is not high, etc.

Images