Preparation method of salt-tolerant cellulose super absorbent polymer (SAP)

A technology of water-absorbent resin and carboxymethyl cellulose, which is applied in the field of preparation of water-absorbent resin, and can solve problems such as poor temperature resistance, high price, and single raw material

Inactive Publication Date: 2014-11-12
CHONGQING UNIV OF ARTS & SCI
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AI Technical Summary

Problems solved by technology

The current preparation of water-absorbent resin has a single raw material and is expensive
At the same time, although the existing water-absorbent resin has strong water absorption energy as a whole, its salt resistance and temperature resistance are poor; the absorption rate of physiological saline is only dozens of times, and the water absorption mechanism needs further breakthroughs

Method used

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  • Preparation method of salt-tolerant cellulose super absorbent polymer (SAP)

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Embodiment Construction

[0013] The present invention is further described and illustrated below through specific embodiments:

[0014] Weigh 3g maleic acid to prepare a solution, add 25% NaOH solution to adjust the neutralization degree (N) of maleic acid to 80%; weigh 1g carboxymethyl cellulose and swell it; accurately weigh 5g acrylamide, 1g 2-acrylamido-2-methylpropanesulfonic acid was placed in a 250mL three-necked flask, and distilled water was added to stir well to disperse evenly; the above-mentioned monomer was poured into a 250ml three-necked flask, and a certain amount of distilled water was added to make w(CMC+ MA+AM+AMPS)=20% (based on the mass of the system); then add 0.1% mass fraction of cross-linking agent N,N'-methylenebisacryloyl solution, heat up to 50°C; at a speed of less than or equal to 100rpm After stirring for 10 minutes, add dropwise an initiator mass fraction of 0.2% ammonium persulfate-sodium bisulfite solution, and continue stirring until the mixture is uniform; nitrogen ...

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Abstract

The invention relates to a preparation method of a salt-tolerant carboxymethylcellulose (CMC) super absorbent polymer (SAP) and discloses a method for preparing the salt-tolerant SAP. The method is characterized by dissolving and mixing CMC, maleic acid (MA), acrylamide (AM), 2-acrylamide-2-methylpropanesulfonic acid (AMPS) and a crosslinking agent, adding an initiator for polymerization and carrying out dewatering and drying, thus preparing the product, namely the salt-tolerant cellulose super absorbent polymer. The method has the beneficial effects that the whole synthesis condition is simple; the cost is low; industrial production is safe and is easy to control; the product has stable quality, high water absorbency and good salt tolerance, is easy to degrade and is pollution-free.

Description

technical field [0001] The present invention relates to a kind of preparation method of water-absorbing resin, especially a kind of preparation method with carboxymethyl cellulose (CMC), acrylamide (AM), 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and maleic acid A method for preparing a water-absorbent resin from acid (MA). Background technique [0002] Water-absorbent resin (SAP) has a high water absorption function of absorbing water hundreds to thousands of times heavier than itself, and has excellent water retention performance. Once it absorbs water and swells into a hydrogel, it is difficult to separate the water even if it is pressurized. Water-absorbent resin is a functional polymer material characterized by a large number of hydrophilic groups, and is a widely used industrial product. The existing superabsorbent resin method is mainly prepared from starch, carboxymethyl cellulose, acrylic acid, etc. by polymerization. The current preparation of water-absorbe...

Claims

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Application Information

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IPC IPC(8): C08F251/02C08F220/56C08F222/02C08F220/58
Inventor 蒋山泉孙向卫
Owner CHONGQING UNIV OF ARTS & SCI
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