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High water-absorbing resin containing iron ions and preparation method thereof

A technology of superabsorbent resin and iron ions, which is applied in the field of biological enzyme catalysis and functional polymer materials, can solve the problems of strict safety and environmental protection requirements, high homopolymer content, and uneasy control of the reaction, and achieve a green, environmentally friendly and pollution-free reaction. The effect of high starch grafting rate and easy control of reaction

Active Publication Date: 2016-08-17
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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Dissolve 4.653g of sodium ferric EDTA in 95g of water, add 5g of waxy cornstarch, gelatinize at 80°C for 0.5h, and wait until the temperature drops to room temperature to prepare 5% waxy cornstarch paste. Additionally, any concentration of waxy cornstarch paste between 1% and 15% can be used.

[0029] (2) Weigh 20 g of acrylic acid, add 35 g of 30% sodium hydroxide under ice bath to neutralize the acrylic acid.

[0030] (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.

[0031] (4) The product obtained in step (3) is taken out, dried and pulverized to obtain a superabsorbent resin grafted with waxy cornstarch acrylic acid.

[0032] In the obtained iron-containing superabsorbent resin, the iron content was 0.17%....

Embodiment 2

[0037] (1) Dissolve 3.085g of ferrous sulfate in 95g of water, add 5g of potato starch, gelatinize at 95°C for 0.5h, and wait for the temperature to drop to room temperature to prepare 5% potato starch paste. In addition, any concentration of potato starch paste between 1% and 15% can be used.

[0038] (2) Weigh 20 g of acrylic acid, add 35 g of 30% sodium hydroxide under ice bath to neutralize the acrylic acid.

[0039](3) Mix the potato starch paste obtained in step (1) with the neutralized acrylic acid obtained in step (2), and add 3.5 mL of horseradish peroxidase, 3.5 mL of hydrogen peroxide, and 0.010 g of N in turn under stirring. N'-methylenebisacrylamide was reacted at 25°C for 9 hours under the protection of nitrogen.

[0040] (4) The product obtained in step (3) is taken out, dried and pulverized to obtain a superabsorbent resin grafted with potato starch acrylic acid.

[0041] In the obtained iron-containing superabsorbent resin, the iron content was 0.2%.

[004...

Embodiment 3

[0046] (1) Dissolve 5.120g of ferric humate in 95g of water, add 5g of lotus root starch, gelatinize at 90°C for 0.5h, and wait until the temperature drops to room temperature to prepare 5% lotus root starch paste. In addition, any concentration of lotus root starch paste between 1% and 15% can be used.

[0047] (2) Weigh 20 g of acrylic acid, add 30 g of 30% sodium hydroxide under ice bath to neutralize the acrylic acid.

[0048] (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.

[0049] (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.

[0050] In the obtained iron-containing superabsorbent resin, the iron cont...

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Abstract

The invention discloses a high water-absorbing resin containing iron ions and a preparation method thereof. The method comprises the following steps that 1, a starch paste containing the iron ions is prepared; 2, acrylic acid is neutralized with strong base; 3, under catalytic initiation of a biological enzyme, starch and acrylic acid are subjected to grafted copolymerization; 4, the grafted copolymerization product obtained in the third step is dried and smashed, and the high water-absorbing resin is obtained. According to the high water-absorbing resin containing the iron ions and the preparation method thereof, the biological enzyme serves as a catalytic initiator to prepare starch grafted copolymerization acrylic acid high water-absorbing resin, and the preparation technology has the advantages of being mild in reaction condition, manageable in reaction process, green, environmentally friendly, free of pollution and the like; due to the fact that the high water-absorbing resin contains the trace element iron, the symptoms of chlorosis, caused by the iron deficiency, of plants planted in calcareous soil or soil with the high pH value can be well solved.

Description

technical field [0001] The invention relates to the field of biological enzyme catalysis and functional polymer materials, in particular to a superabsorbent resin containing iron ions and a preparation method thereof. More specifically, it relates to a superabsorbent resin containing iron ions prepared by using biological enzymes as catalytic initiators and a preparation method thereof. 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 ...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F220/06C08F222/38C08F4/34C08F4/30C08K5/17C08K3/30
CPCC08F4/30C08F4/34C08F251/00C08K3/30C08K5/17C08K2003/3045C08F220/06C08F222/385
Inventor 谢兴斌方从兵曹海生章林忠孙俊杨军刘洋
Owner ANHUI AGRICULTURAL UNIVERSITY
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