Modification method for improving saline tolerance of acrylic acid macromolecule water uptake resin with alpha-cyclodextrin

A technology for polymer water absorption and acrylic acid, which is applied in the modification field of improving the salt resistance of acrylic polymer water-absorbing resin by using α-cyclodextrin, which can solve the problem of poor salt resistance, low salt absorption rate, and little resin structure modification. and other problems, to achieve the effect of improving salt tolerance and increasing the rate of salt water absorption.

Inactive Publication Date: 2009-04-08
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its water absorption rate can reach hundreds of times or even thousands of times, but its disadvantage is that it has poor salt resistance and extremely low salt water absorption rate, and there are generally salts in the use environment of super absorbent resin, which makes its The scope of application is limited, so improving its salt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The modification method of improving the salt resistance of acrylic polymer water-absorbing resin by using α-cyclodextrin adopts the method of aqueous solution polymerization, which includes the following steps:

[0023] 1) by weight parts of each composition raw material is:

[0024] Acrylic 15,

[0025] NaOH 5,

[0026] N, N'-methylenebisacrylamide 0.02,

[0027] α-Cyclodextrin 0.05,

[0028] Ammonium persulfate 0.04,

[0029] distilled water 15,

[0030] Select acrylic acid, sodium hydroxide, N, N'-methylenebisacrylamide, α-cyclodextrin, ammonium persulfate and distilled water;

[0031] 2) Pre-configure the required solution with distilled water for standby: configure a sodium hydroxide solution with a mass concentration of 25% (15 parts with distilled water); add acrylic acid to a reaction kettle with a water bath, and add hydrogen with a mass concentration of 25% to the acrylic acid Neutralize the sodium oxide solution, then add α-cyclodextrin and cross-linki...

Embodiment 2

[0035] The modification method of improving the salt resistance of acrylic polymer water-absorbing resin by using α-cyclodextrin adopts the method of aqueous solution polymerization, which includes the following steps:

[0036] 1) by weight parts of each composition raw material is:

[0037] Acrylic 18,

[0038] Sodium hydroxide 10,

[0039] N, N'-methylenebisacrylamide 0.08,

[0040] α-Cyclodextrin 0.12,

[0041] Ammonium persulfate 0.15,

[0042] distilled water 30,

[0043] Select acrylic acid, sodium hydroxide, N, N'-methylenebisacrylamide, α-cyclodextrin, ammonium persulfate and distilled water;

[0044] 2) Pre-configure the required solution with distilled water for standby: configure a sodium hydroxide solution with a mass concentration of 25% (30 parts with distilled water);

[0045] Add acrylic acid to a reaction kettle with a water bath, add a sodium hydroxide solution with a mass concentration of 25% to the acrylic acid to neutralize, then add α-cyclodextrin a...

Embodiment 3

[0049] The modification method of improving the salt resistance of acrylic polymer water-absorbing resin by using α-cyclodextrin adopts the method of aqueous solution polymerization, which includes the following steps:

[0050] 1) by weight parts of each composition raw material is:

[0051] Acrylic 20,

[0052] NaOH 8,

[0053] N, N'-methylenebisacrylamide 0.05,

[0054] α-cyclodextrin 0.36,

[0055] Ammonium persulfate 0.08,

[0056] distilled water 24,

[0057] Select acrylic acid, sodium hydroxide, N, N'-methylenebisacrylamide, α-cyclodextrin, ammonium persulfate and distilled water;

[0058] 2) Pre-configure the required solution with distilled water for standby: configure a sodium hydroxide solution with a mass concentration of 25% (24 parts with distilled water);

[0059]Add acrylic acid to a reaction kettle with a water bath, add a sodium hydroxide solution with a mass concentration of 25% to the acrylic acid to neutralize, then add α-cyclodextrin and crosslinkin...

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PUM

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Abstract

The invention relates to a modification method for improving the salt tolerance of a crylic acid macromolecule absorbent resin. The modification method which utilizes Alpha-cyclodextrin to improve the salt tolerance of the crylic acid macromolecule absorbent resin is characterized by comprising the following steps: 1) according to the parts of all component raw materials by weight as follows: 15 portions to 40 portions of crylic acid, 5 portions to 18 portions of sodium hydroxide, 0.02 portion to 1 portion of N, N'- methylene bisacrylamide, 0.05 portion to 2 portions of Alpha-cyclodextrin, 0.04 portion to 2 portions of ammonium peroxydisulfate and 15 portions to 54 portions of water, the raw materials are selected; 2) all raw materials are added into a reaction kettle with a water bath, the temperature is risen to 65 DEG C to 80 DEG C and the reaction lasts for 1 hour to 3 hours; 3) stirring in the reaction kettle is stopped and the kettle is allowed to stand for 0.5 hour to 2 hours and reaction mass in the reaction kettle is discharged; and 4) after being dried, the reaction mass is crushed, thus obtaining the modified crylic acid macromolecule absorbent resin. The method can evidently improve the salt tolerance of the crylic acid macromolecule absorbent resin prepared by the method can be evidently improved.

Description

technical field [0001] The invention relates to a modification method for improving the salt resistance of an acrylic polymer water-absorbing resin. Background technique [0002] Most of the polymer water-absorbent resins currently used are polyacrylate superabsorbent resins, which are mainly obtained through aqueous solution polymerization. The aqueous solution polymerization method produces superabsorbent resin, the reaction process is stable, it will not explode, it is easy to operate, has little impact on the environment, and the equipment requirements are relatively simple. It is a process suitable for large-scale production. Its water absorption rate can reach hundreds of times or even thousands of times, but its disadvantage is that it has poor salt resistance and extremely low salt water absorption rate, and there are generally salts in the use environment of super absorbent resin, which makes its The scope of application is limited, so improving its salt tolerance ...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F220/06
Inventor 王勇邢凯华邓雷张联盟
Owner WUHAN UNIV OF TECH
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