Method for preparing super absorbent resin with cross-linked structure by using potato starch as raw material

Abstract

The invention discloses a method for preparing super absorbent resin with a cross-linked structure by using potato starch as the raw material, which comprises the following main processes: carrying out neutralization reaction between a sodium hydroxide solution and acrylic acid from which polymerization inhibitor is removed under the cooling of ice-water bath; mixing potato starch with de-ionizedwater and pasting the mixture; mixing the neutralized acrylic acid and the sodium salt solution thereof with the pasted potato starch; adding an evocating agent persulfate and a cross-linking agent N,N'- methylene-bisacrylamide; uniformly stirring the mixture under the protection of nitrogen; heating the mixture by water bath to rise the temperature so as to ensure that the potato starch and the acrylic acid and the sodium salt thereof generate graft copolymerization reaction under the protection of nitrogen; keeping the temperature of the reaction; and baking and crashing to obtain the superabsorbent resin with a cross-linked structure. Compared with similar products, the water absorption of the super absorbent resin is greatly enhanced and the super absorbent resin can absorb a certainamount of heavy metal ion. The super absorbent resin has great effect on the water conservation, the desert control, the environmental improvement and the like of soil in dry regions.

Description

technical field [0001] The present invention relates to the preparation method of superabsorbent resin used in agriculture, forestry, animal husbandry, gardening and daily necessities, in particular refers to the preparation of potato starch, acrylic acid, persulfate, N, N'-methylenebisacrylamide, hydrogen The invention discloses a method for preparing a superabsorbent resin with a cross-linked structure with sodium as the main raw material. Background technique [0002] The excellent water absorption and water retention properties of superabsorbent resin make it widely used in many fields. Disposable paper diapers and other sanitary products are the earliest application fields for superabsorbent resins, and they are still the largest consumer market for superabsorbent resins. Adding superabsorbent resin to the soil can change the aggregate structure of the soil, increase the water permeability and air permeability of the soil, and store the added water. It has attractive e...

AI Technical Summary

Problems solved by technology

Although my country has achieved certain results in the research of superabsorbent resins, there are still many problems, such as low water absorption of resins, poor salt resistance, low gel strength after water absorption, complex production processes, and high product costs. There are not many studies on water absorption theory, performance and application of superabsorbent resins, and there are still relatively few varieties and quantities produced by industrialized manufacturers. There are many tasks that people need to do in depth.

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