Preparation method of degradable high-performance water absorbent resin

Abstract

The invention provides a preparation method of degradable high-performance water absorbent resin. The preparation method includes: smashing polybutylene succinate for standby use; weighing acrylic andpolybutylene succinate powder according to a certain mass ratio into a four-neck flask; using a sodium hydroxide water solution to neutralize the acrylic acid to obtain an acrylic acid and sodium acrylate solution; cooling to room temperature, then slowly adding an initiator and a crosslinking agent; feeding nitrogen, slowly increasing temperature, and stirring to enable the acrylic acid and sodium acrylate solution to be in grafting copolymerization reaction with polybutylene succinate; pouring anhydrous alcohol after the reaction is finished, repeatedly washing, and drying to obtain polybutylene succinate grafted sodium acrylate resin. Polybutylene succinate grafted sodium acrylate copolymerization is adopted to form the water absorbent resin, so that the water absorbent resin has highbiodegradability, good mechanical performance and high water absorbency and can be widely applied in many fields. The preparation method is simple, low in cost and easy for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of water-absorbing resins, in particular to a degradable resin with high water-absorbing performance and a preparation method thereof. Background technique [0002] High-performance water-absorbing resin is a resin with hydrophilic groups and a certain degree of cross-linking. It has high water absorption and water retention properties, making it widely used in sanitary products, agricultural irrigation, soil improvement, building materials and medical treatment. Wide range of applications. my country has conducted in-depth research on high-performance water-absorbent resins for many years, mainly including water-absorbent resins made of starch, cellulose and acrylic. Acrylic acid is neutralized with sodium hydroxide. After the reaction, it is mixed with gelatinized potato starch, and an initiator is added to make the potato starch, acrylic acid and its salts undergo graft copolymerization. After drying and ...

AI Technical Summary

Problems solved by technology

my country has conducted in-depth research on high-performance water-absorbing resins for many years, mainly including water-absorbing resins made of starch, cellulose and acrylic acid. Acrylic acid is neutralized with sodium hydroxide. After the reaction, it is mixed with gelatinized potato starch, and an initiator is added to make the potato starch, acrylic acid and its salts undergo graft copolymerization. After drying and crushing, a super absorbent resin is obtained. The joint degree is not high, so that it is easy to dissolve instead of swell, so that the water absorption rate of the water-absorbent resin is not high, and the potato starch is mainly derived from the crop potato, making it difficult to put it into large-scale application

The patent "CN103122049B" discloses a preparation method of cellulose superabsorbent resin, using aluminum hydroxide as a crosslinking agent and ammonium persulfate as an initiator to graft cellulose onto sodium acrylate under the reaction conditions of 85°C , the reaction temperature is high, and it is easy to cause violent polymerization during the polymerization process, which is not conducive to the formation of cross-linked structure, so that the water absorption rate is not high

The patent "CN100398573C" discloses a method for preparing an acrylic superabsorbent resin, which uses acrylic acid and acrylate as raw materials to form an acrylic superabsorbent resin. However, the acrylic superabsorbent resin has the disadvantage of poor biodegradability and is harmful to the environment create pollution

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