A kind of preparation method of environment-friendly and energy-saving superabsorbent resin

Abstract

The invention discloses a method for preparing an environment-friendly and energy-saving superabsorbent resin, which belongs to the technical field of environment-friendly resin preparation. Add a certain amount of phenolic insulation waste material into the sodium hydroxide solution and then pour it into a semi-sealed reactor, and then heat the mixed solution in a vacuum drying oven for 0.5h under low pressure. After the reaction is complete, add a certain amount of acrylamide and acrylic acid, cross-linking agent and ammonium persulfate solution into the semi-sealed reactor, and then heat and react in a vacuum oven for 4 hours at low pressure. After the reaction, the sample is pulverized and dried to obtain the water-retaining agent. The beneficial effect of the present invention is to solve the problem of environmental pollution by waste materials, save energy, and adopt the new technology of low-pressure nano-initiation, avoid the process link of feeding nitrogen in the conventional method, and effectively reduce the cost. , has proper water absorption and water retention capacity, and the hydrogel formed after water absorption has high strength.

Description

technical field [0001] The invention belongs to the technical field of environment-friendly resin preparation, and in particular relates to a method for preparing an environment-friendly and energy-saving superabsorbent resin. Background technique [0002] Water retaining agent, also known as super absorbent resin, is a new type of functional polymer material. It can absorb hundreds of times or even thousands of times its own weight in water, and the absorbed water will not dehydrate or rarely dehydrate even under pressure, so it is also called high water retention agent; super absorbent resin absorbs water but is insoluble Soluble in water, insoluble in conventional organic solvents, non-irritating to biological tissues, reusable, blood-absorbing, urine-absorbing properties. Therefore, superabsorbent resins have been widely used in many fields such as sanitary products, medicine, agriculture, forestry and gardening, desert control and greening, and construction. [0003] ...

AI Technical Summary

Problems solved by technology

At present, there are manufacturers with mass production capacity in China. The products of these factories are sodium polyacrylate or starch grafted sodium polyacrylate. The quality of this kind of products, except for the compound composition itself, most of the water retaining agents in my country rely on imports due to technical limitations. , is expensive and cannot be used on a large scale, and can only be used in areas with less usage such as golf courses and soilless cultivation

Imported products mainly include TC from Belgium, AQUASORB water retaining agent from SNF in France, and Stocksorb water retaining agent from Stockhau Sen in Germany, but they are expensive and not suitable for large-scale use

[0004] According to the statistics of the China Thermal Insulation Association, the annual production of phenolic insulation boards in China is about 1.8 million cubic meters, and the powder waste formed in the production process accounts for 10%; at the same time, my country's existing buildings are 43 billion square meters, and there are still With an increase of 1.6 billion square meters per year, it is conceivable that the amount of use and waste of insulation boards is large. At this stage, most of the waste is stored in warehouses or buried, and the development of treatment technology has not kept up with the amount of waste generated by insulation boards. , These wastes are acidic and difficult to degrade. If they are not treated for a long time, they will cause serious soil acidification, lead to soil barrenness, and affect the normal growth of plants; cause air acidification, cause acid rain, and induce plant diseases and insect pests, reduce crop production, and cause dusty It will also cause serious air pollution and have huge potential environmental risks, so how to deal with waste phenolic insulation boards has become an urgent problem to be solved

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