Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of salt-tolerant cellulose super absorbent polymer (SAP)

Examples

Experimental program
Comparison scheme
Effect test

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 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08F251/02C08F220/56C08F222/02C08F220/58
Inventor 蒋山泉孙向卫
Owner CHONGQING UNIV OF ARTS & SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products