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Super absorbent resin having cavity structure and preparation method of super absorbent resin

A technology of superabsorbent resin and cavity, which is applied in the field of superabsorbent resin with cavity structure and its preparation, which can solve the problems of fast absorption rate and other difficulties, and achieve improved surface structure, high pressure absorption, and increased compatibility Effect

Active Publication Date: 2015-11-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, generally speaking, it is difficult to achieve both high pressurized absorption capacity and fast absorption rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) In a beaker containing 100g of calcium carbonate and 500g of water, add 2g of aluminate coupling agent and 0.25g of phosphate ester surfactant, stir at 80°C for 1h, filter and dry to obtain modified nucleation Object A;

[0034] (2) Add 75g Span-80 to 5kg cyclohexane and stir evenly, this is the oil phase B liquid; add 0.045g tetraallyloxyethane, 1g persulfuric acid to 250g mass fraction of 40% acrylamide aqueous solution Ammonium and 50g of modified nucleating substance A, stir evenly, this is liquid C; put the four-neck flask with liquid B in a water bath at 75°C, add liquid C under high-speed stirring, and react to obtain a polyacrylamide layer ;

[0035] (3) Add a certain amount of hydrochloric acid solution to the reaction solution in step (2), adjust the pH of the aqueous phase solution to be 2, and stir for 0.5 hours, then add sodium hydroxide solution to adjust the pH of the aqueous phase to be 7.0 ± 0.5;

[0036] (4) Mix 2kg of acrylic acid, 1.78kg of sod...

Embodiment 2

[0039] (1) In a beaker with 100g of manganese carbonate and 500g of water, add 3g of aluminate coupling agent and 0.45g of phosphate ester surfactant, stir at 80°C for 1h, filter and dry to obtain modified nucleation Object A;

[0040] (2) Add 75g Span-80 to 5kg cyclohexane and stir evenly, this is the oil phase B liquid; add 0.06g tetraallyloxyethane, 1g persulfuric acid to 250g mass fraction of 40% acrylamide aqueous solution Ammonium and 10g of modified nucleating substance A, stir evenly, this is liquid C; put the four-necked flask with liquid B in a water bath at 75°C, add liquid C under high-speed stirring, and react to obtain a polyacrylamide layer ;

[0041] (3) Add a certain amount of hydrochloric acid solution to the reaction solution in step (2), adjust the pH of the aqueous phase solution to be 4, and stir for 0.5 hours, then add sodium hydroxide solution to adjust the pH of the aqueous phase to be 7.0 ± 0.5;

[0042] (4) Mix 1kg acrylic acid, 0.889kg mass fracti...

Embodiment 3

[0045](1) In a beaker containing 100g of cadmium carbonate and 500g of water, add 1.5g of aluminate coupling agent and 0.1g of phosphate ester surfactant, stir at 80°C for 1h, filter and dry to obtain modified nuclei A;

[0046] (2) Add 75g Span-80 to 5kg cyclohexane and stir evenly, this is the oil phase B liquid; add 0.03g tetraallyloxyethane, 1g persulfuric acid to 250g mass fraction of 40% acrylamide aqueous solution Ammonium and 25g of modified nucleating substance A, stir evenly, this is liquid C; put the four-neck flask with liquid B in a water bath at 75°C, add liquid C under high-speed stirring, and react to obtain a polyacrylamide layer ;

[0047] (3) Add a certain amount of hydrochloric acid solution to the reaction solution in step (2), adjust the pH of the aqueous phase solution to be 2.5, and stir for 0.5 hours, then add sodium hydroxide solution to adjust the pH of the aqueous phase to be 7.0 ± 0.5;

[0048] (4) 1.5kg acrylic acid, 1.335kg mass fraction are 50...

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PUM

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Abstract

The invention belongs to the technical field of super absorbent resin, and discloses super absorbent resin having a cavity structure and a preparation method of the super absorbent resin. The preparation method comprises the steps: first carrying out surface modification treatment on an acid-soluble inorganic nucleation object, then polymerizing acrylamide on the surface of the nucleation object in the existence of a cross-linking agent and an initiating agent to obtain a polyacrylamide layer, dissolving the inorganic nucleation object by virtue of acid to form a cavity structure, polymerizing acrylic monomers on the surface of the polyacrylamide layer to obtain a polyacrylic acid layer, and finally performing cross-linking reaction on the surface of the polyacrylic acid layer by utilizing a surface cross-linking solution, to obtain the super absorbent resin having the cavity structure. The super absorbent resin having the cavity structure is high in absorption rate, high in pressurizing absorption amount and relatively wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of superabsorbent resin materials, and in particular relates to a superabsorbent resin with a cavity structure and a preparation method thereof. Background technique [0002] Superabsorbent resin (SAP) is a new type of polymer material with excellent water absorption and water retention. It can absorb water dozens or thousands of times its own weight and swell into a gel. Under a certain range of pressure, water It will not separate out. There are two techniques for preparing superabsorbent resin from acrylic acid: solution polymerization and reverse suspension polymerization. Among them, the reverse-phase suspension polymerization method is a new method developed in the past ten years, which has the advantages of simple preparation process, good physical form and water absorption performance of the resin. [0003] In recent years, superabsorbent resins have been widely used as one of the main constituent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08F2/32C08F120/06C08F120/56
Inventor 沈慧芳王飞
Owner SOUTH CHINA UNIV OF TECH
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