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A method for preparing superabsorbent resin with biological enzyme as catalytic initiator

A technology of superabsorbent resin and bio-enzyme, which is applied in the field of bio-enzyme catalysis and functional polymer materials, can solve the problems of strict safety and environmental protection requirements, difficult reaction control, high homopolymer content, etc. Easy to control and high starch grafting rate

Active Publication Date: 2018-10-19
ANHUI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most of the development and utilization of starch-grafted acrylic acid superabsorbent resins currently use chemical substances such as cerium salts, persulfates, manganese salts, bromates, and gamma rays as catalytic initiators. These chemical substances are used as catalytic initiators. There are problems of uncontrollable reaction, high homopolymer content and chemical pollution; γ-ray catalysis causes problems such as large equipment investment, high operating cost, and strict safety and environmental protection requirements

Method used

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  • A method for preparing superabsorbent resin with biological enzyme as catalytic initiator
  • A method for preparing superabsorbent resin with biological enzyme as catalytic initiator
  • A method for preparing superabsorbent resin with biological enzyme as catalytic initiator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Add 5 g of waxy corn starch to 95 g of water, gelatinize at 80° C. for 0.5 hour, and wait until the temperature drops to room temperature to prepare waxy corn starch paste.

[0037] (2) Weigh 20 g of acrylic acid, add 35 g of 30% sodium hydroxide under ice bath to neutralize the acrylic acid.

[0038] (3) Mix the waxy cornstarch paste obtained in step (1) with the neutralized acrylic acid obtained in step (2), and add 2.5mL of horseradish peroxidase, 2.5mL of hydrogen peroxide, and 0.010g of N , N'-methylenebisacrylamide, under the protection of nitrogen, react at a constant temperature of 30°C for 5h.

[0039] (4) The product obtained in step (3) is taken out, dried and pulverized to obtain a superabsorbent resin grafted with waxy cornstarch acrylic acid.

[0040] The cross-sectional electron microscope photos of the product are shown in figure 1 , it can be seen from the figure that the product is a super absorbent resin with uniform microstructure.

[0041] Th...

Embodiment 2

[0043] (1) Add 5 g of potato starch into 95 g of water, gelatinize at 95° C. for 0.5 hour, and wait until the temperature drops to room temperature to prepare potato starch paste.

[0044] (2) Weigh 20 g of acrylic acid, add 35 g of 30% sodium hydroxide under ice bath to neutralize the acrylic acid.

[0045] (3) Mix the potato starch paste obtained in step (1) with the neutralized acrylic acid obtained in step (2), and add 3.5mL horseradish peroxidase, 3.5mL hydrogen peroxide, 0.010g N, N'-methylenebisacrylamide was reacted at 25°C for 9 hours under the protection of nitrogen.

[0046] (4) The product obtained in step (3) is taken out, dried and pulverized to obtain a superabsorbent resin grafted with potato starch acrylic acid.

[0047] The cross-sectional electron microscope photos of the product are shown in figure 2 , It can be seen from the figure that the product is a superabsorbent resin containing starch microcrystals.

[0048] The equilibrium water absorption of t...

Embodiment 3

[0050] (1) Add 5 g of lotus root starch to 95 g of water, gelatinize at 90° C. for 0.5 hour, and wait until the temperature drops to room temperature to prepare lotus root starch paste.

[0051] (2) Weigh 20 g of acrylic acid, add 30 g of 30% sodium hydroxide under ice bath to neutralize the acrylic acid.

[0052] (3) Mix the lotus root starch paste obtained in step (1) with the neutralized acrylic acid obtained in step (2), and add 4 mL of horseradish peroxidase, 4 mL of hydrogen peroxide, and 0.010 g of N,N' – Methylenebisacrylamide, under the protection of nitrogen, react at a constant temperature of 35° C. for 3 hours.

[0053] (4) The product obtained in step (3) is taken out, dried and pulverized to obtain a superabsorbent resin grafted with lotus root starch and acrylic acid.

[0054] The cross-sectional electron microscope photos of the product are shown in figure 1 , it can be seen from the figure that the product is a superabsorbent resin partially containing starc...

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Abstract

The invention discloses a method for preparing high-water-absorption resin with biological enzyme as the catalytic initiator.The method includes the following steps of firstly, preparing starch paste; secondly, neutralizing acrylic acid with strong alkali; thirdly, conducting graft copolymerization reaction on starch and acrylic acid under the catalysis initiation of the biological enzyme; fourthly, drying and smashing a graft copolymerization product obtained in the third step to obtain the high-water-absorption resin.The starch graft copolymerization acrylic acid high-water-absorption resin is prepared with the biological enzyme as the catalytic initiator; the preparation process has the advantages that the reaction conditions are mild, and the reaction process is easy to control, green, environmentally friendly, free of pollution and the like; the prepared high-water-absorption resin has the advantages of being high in starch grafting rate, high in water absorption rate, good in biological degradation performance and the like.

Description

technical field [0001] The invention relates to the field of biological enzyme catalysis and functional polymer materials, in particular to a method for preparing superabsorbent resin by using biological enzyme as a catalytic initiator. Background technique [0002] Superabsorbent resin is a kind of functional polymer with strong hydrophilic functional groups such as carboxyl group and hydroxyl group, and has a spatial network structure. Through hydration, it can quickly absorb water dozens or even thousands of times its own weight, and it can also absorb liquids such as saline, blood, and urine dozens to a hundred times. As a new type of functional polymer material, superabsorbent resin has the characteristics of large water absorption and strong water retention. It is completely different from traditional water-absorbing materials (such as sponges, paper, cotton, etc.) , cosmetics and building materials and other fields have a wide range of uses. [0003] Starch is a nat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08F220/06C08F222/38C08F4/30C08F4/34
CPCC08F4/30C08F4/34C08F251/00C08F220/06C08F222/385
Inventor 方从兵谢兴斌孙培培郝福玲曹海生章林忠杨军
Owner ANHUI AGRICULTURAL UNIVERSITY
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