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Calcium carbonate/bagasse cellulose-based super absorbent resin and preparation method thereof

A technology of superabsorbent resin and water-absorbent resin, which is applied in fiber raw materials, fiber raw material processing, textiles and papermaking, etc. It can solve the problems of strength and liquid absorption rate without great progress, and achieve the improvement of gel strength and water absorption rate. , temperature controllable, easy heat transfer effect

Active Publication Date: 2021-03-16
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the existing technology has some research on the water absorption rate and salt resistance of the water-absorbent resin, there is no great progress in the improvement of the strength and liquid absorption rate of the resin after water absorption.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Extraction of bagasse cellulose: crush and sieve the bagasse with a pulverizer, weigh the bagasse and add 0.1mol / L HCl in a water bath at 80°C, then wash with suction to pH = 7, add distilled water, and heat at 80°C Water bath to remove residual sugar in sucrose, and finally dried for storage;

[0026] After sugar removal, microwave ultrasonic assisted alkaline hydrogen peroxide treatment of bagasse: Weigh 5 g of bagasse, 3 g of hydrogen peroxide solution with a mass fraction of 30%, 4.5 g of flake sodium hydroxide, hydrogen peroxide stabilizer (solid EDTA powder 0.6 g and magnesium sulfate 0.03 g of solid powder), 140 g of deionized water; reacted in a computerized microwave-ultrasonic combined catalytic synthesis extractor, where the ultrasonic power was set at 250 W, the microwave power was 150 W, and reacted at 60 °C for 70 min, washed with deionized water until pH= 7. Dry at 60°C to obtain cellulose extracted from bagasse;

[0027](2) Preparation of modified p...

Embodiment 2

[0031] (1) Extraction of bagasse cellulose: crush and sieve the bagasse with a pulverizer, weigh the bagasse and add 0.1mol / L HCl in a water bath at 80°C, then wash with suction to pH = 7, add distilled water, and heat at 80°C Water bath to remove residual sugar in sucrose, and finally dried for storage;

[0032] After sugar removal, microwave ultrasonic assisted alkaline hydrogen peroxide treatment of bagasse: Weigh 5 g of bagasse, 3 g of hydrogen peroxide solution with a mass fraction of 30%, 4.5 g of flake sodium hydroxide, hydrogen peroxide stabilizer (solid EDTA powder 0.6 g and magnesium sulfate 0.03 g of solid powder), 140 g of deionized water; the reaction was carried out in a computerized microwave-ultrasonic combined catalytic synthesis extractor, in which the ultrasonic power was set at 250 W, the microwave power was 200 W, and the reaction was carried out at 70 °C for 70 min, and washed with deionized water until pH = 7. Dry at 60°C to obtain cellulose extracted fr...

Embodiment 3

[0037] (1) Extraction of bagasse cellulose: crush and sieve bagasse with a pulverizer, weigh bagasse and add 0.1mol / L HCl in 80°C water bath, then filter and wash until pH = 7, add distilled water, 80°C Water bath to remove residual sugar in sucrose, and finally dried for storage;

[0038] After sugar removal, microwave ultrasonic assisted alkaline hydrogen peroxide treatment of bagasse: Weigh 5 g of bagasse, 3 g of hydrogen peroxide solution with a mass fraction of 30%, 4.5 g of flake sodium hydroxide, hydrogen peroxide stabilizer (solid EDTA powder 0.6 g and magnesium sulfate 0.03 g of solid powder), 140 g of deionized water; the reaction was carried out in a computerized microwave-ultrasonic combined catalytic synthesis extractor, in which the ultrasonic power was set at 250 W, the microwave power was 200 W, the reaction was carried out at 65 °C for 70 min, and the deionized water was washed until pH = 7. Dry at 60°C to obtain cellulose extracted from bagasse;

[0039] (2)...

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Abstract

The invention discloses calcium carbonate / bagasse cellulose-based super absorbent resin and a preparation method thereof, and belongs to the technical field of super absorbent resin preparation. Bagasse and modified porous calcium carbonate are used as raw materials, ammonium persulfate is used as an initiator, N,N'-methylene bisacrylamide is used as a cross-linking agent, acrylic acid and acrylamide are used as grafting monomers, and the calcium carbonate / bagasse cellulose-based composite super absorbent material is prepared by adopting an aqueous solution polymerization grafting method. Under the optimal condition, the water absorption rate of the water-absorbent resin reaches 900 g / g or above, and the salt absorption rate (0.9 wt.% NaCl) reaches 135 g / g or above and is higher than thatof a water-absorbent material which is industrially applied at present. The water absorption rate of the material can reach 300 g / g or above within 1 min after water absorption is started, and the salt absorption rate (0.9 wt.% NaCl) reaches 45 g / g or above. Due to rapid water absorption, strong water absorption capacity and salt-tolerant effect, the water-retaining agent has a wide application prospect in the fields of hygienic products for children and adults, agricultural water-retaining materials and the like.

Description

technical field [0001] The invention belongs to the technical field of superabsorbent resin preparation, and in particular relates to the preparation of calcium carbonate / bagasse cellulose-based superabsorbent resin by graft polymerization of an aqueous solution using bagasse, waste from sugar factories, as a raw material and inorganic porous materials as additives. The method has the advantages of simple operation, mild reaction conditions, large-scale production, and is a fast water-absorbing, salt-resistant superabsorbent resin, which has good application prospects. Background technique [0002] Super absorbent resin Super absorbent material is a functional polymer material with a three-dimensional network structure that can absorb and maintain hundreds or even thousands of times its own weight in pure water or tens of times of normal saline. It is widely used in daily use, Chemical industry, light industry, medicine and health and other fields, but most of the current su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/02C08F292/00C08F220/06C08F220/56C08F222/38D21B1/30
CPCC08F251/02C08F292/00D21B1/306D21B1/303C08F220/06C08F220/56C08F222/385Y02P20/54
Inventor 秦祖赠马力谢新玲苏通明罗轩纪红兵张友全
Owner GUANGXI UNIV
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