Super water-absorbent resin with high reverse osmosis resistance, preparation method and application thereof

Abstract

The invention discloses a high anti-reverse osmosis superabsorbent resin and its preparation method and application. The preparation method of the superabsorbent resin is as follows: S1, dissolving the basic compound in deionized water, adding acrylic acid monomer solution , to obtain a neutralizing solution; S2, adding dodecyl mercaptan to the neutralizing solution, adding an initiator, a crosslinking agent and a foaming agent to polymerize to obtain a hydrogel; S3, making the hydrogel in step S2 Cool down to room temperature, then crush and granulate, dry and pulverize successively to obtain resin primary particles, then perform wet ball milling on the resin primary particles, perform granulation again, dry and pulverize to obtain resin particles; S4, the resin particles in step S3 Spray surface cross-linking liquid on the surface. The invented superabsorbent resin can be used in disposable diapers, and has the advantages of high absorption ratio, fast liquid absorption speed, excellent water retention performance and excellent anti-reverse seepage performance of the superabsorbent resin prepared by the method.

Description

technical field [0001] The present invention relates to the technical field of resin preparation, more specifically, it relates to a high water-absorbent resin with high reverse seepage resistance and its preparation method and application. Background technique [0002] Super Absorbent Polymer (SAP) is a cross-linked network polymer containing a large number of strong polar groups. It was first prepared by Fanta et al. by grafting polyacrylonitrile with starch and then saponifying it. Since the 1960s, superabsorbent resins have been widely developed around the world. They can be divided into two categories according to raw materials. The first category is natural polymers, such as starch and cellulose; the second category is synthetic polymers, such as polymers. Acrylic acid, polyoxyethylene, and polyvinyl alcohol, among which more than 80% of super absorbent resins are polymerized from acrylic acid monomers. Because the cross-linked acrylic water-absorbing resin has a netw...

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Problems solved by technology

Therefore, acrylic water-absorbent resins are widely used in sanitary industries such as baby diapers and paper diapers, and are also widely used in industries such as agriculture and forestry water conservation, desert control, and oil field water plugging. It is increasing at a rate of 10%-15% per year, but the existing diapers using super absorbent resin usually have the problem of large reverse osmosis under a certain pressure after absorbing water and swelling, and a humid environment will be formed when worn for a long time , not conducive to skin health, there will be redness and swelling, and even induce diaper rash, so it is of great significance to strengthen the research on the anti-reverse osmosis performance of super absorbent resin