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Method for preparing high-nitrogen-content, high-potassium-content and high-water-absorption resin by using carboxymethyl potato starch and hydrogen peroxide as raw materials by one-pot method

The technology of potato starch and carboxymethyl group is applied in the field of preparation of functional polymer materials-superabsorbent resin, which can solve the problems of affecting the water absorption capacity of superabsorbent resin, low water absorption rate, introducing impurity ions, etc., and achieves good application and promotion value. , low cost, easy to operate

Active Publication Date: 2016-06-29
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are more and more researches on superabsorbent resin, but the water absorption rate is not high, the process is complicated, and the cost is high. The problem has been confusing for researchers. The polymerization of superabsorbent resin needs the initiation of initiator, and the initiator mainly has free There are two types of initiators (azo and persulfate, etc.) and redox initiators, but the disadvantage of these two types of initiators is that they will introduce impurity ions, which will eventually affect the water absorption of superabsorbent resins.

Method used

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  • Method for preparing high-nitrogen-content, high-potassium-content and high-water-absorption resin by using carboxymethyl potato starch and hydrogen peroxide as raw materials by one-pot method
  • Method for preparing high-nitrogen-content, high-potassium-content and high-water-absorption resin by using carboxymethyl potato starch and hydrogen peroxide as raw materials by one-pot method
  • Method for preparing high-nitrogen-content, high-potassium-content and high-water-absorption resin by using carboxymethyl potato starch and hydrogen peroxide as raw materials by one-pot method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Weigh 5g of carboxymethyl potato starch and 30ml of deionized water and mix evenly, add 5ml of hydrogen peroxide and oxidize at 50°C for 2h, measure 10g (9.5ml) of acrylic acid (to remove the polymerization inhibitor); weigh 3.9g of KOH Dissolve in 10ml of deionized water, neutralize acrylic acid with the KOH solution prepared above under cooling in an ice-water bath; weigh 10g of acrylamide and dissolve it in 10ml of deionized water to prepare an acrylamide solution. Fully mix the neutralized acrylic acid and its salt solution and the prepared acrylamide solution with the oxidized carboxymethyl potato starch solution, add 4ml of N,N'-methylenebispropylene with a concentration of 2.5mg / ml Amide solution, in N 2 Under protection, heat slowly to increase the temperature of the system gradually. After the polymerization reaction starts, stop stirring, continue to raise the temperature slowly, keep it at 80°C for 2 hours, dry and pulverize to obtain the product. ...

Embodiment 2

[0028] Example 2: Weigh 5g of carboxymethyl potato starch and 30ml of deionized water and mix evenly, add 8ml of hydrogen peroxide and oxidize at 50°C for 2h, measure 10g (9.5ml) of acrylic acid (to remove the polymerization inhibitor); weigh 3.9g of KOH Dissolve in 10ml of deionized water, neutralize acrylic acid with the KOH solution prepared above under cooling in an ice-water bath; weigh 10g of acrylamide and dissolve it in 10ml of deionized water to prepare an acrylamide solution. Fully mix the neutralized acrylic acid and its salt solution and the prepared acrylamide solution with the oxidized carboxymethyl potato starch solution, add 4ml of N,N'-methylenebispropylene with a concentration of 2.5mg / ml Amide solution, in N 2 Under protection, heat slowly to increase the temperature of the system gradually. After the polymerization reaction starts, stop stirring, continue to raise the temperature slowly, keep it at 80°C for 2 hours, dry and pulverize to obtain the product. ...

Embodiment 3

[0029] Example 3: Weigh 5g of carboxymethyl potato starch and 30ml of deionized water and mix evenly, add 5ml of hydrogen peroxide and oxidize at 40°C for 2h, measure 10g (9.5ml) of acrylic acid (to remove the polymerization inhibitor); weigh 3.9g of KOH Dissolve in 10ml of deionized water, neutralize acrylic acid with the KOH solution prepared above under cooling in an ice-water bath; weigh 10g of acrylamide and dissolve it in 10ml of deionized water to prepare an acrylamide solution. Fully mix the neutralized acrylic acid and its salt solution and the prepared acrylamide solution with the oxidized carboxymethyl potato starch solution, add 4ml of N,N'-methylenebispropylene with a concentration of 2.5mg / ml Amide solution, in N 2 Under protection, heat slowly to increase the temperature of the system gradually. After the polymerization reaction starts, stop stirring, continue to raise the temperature slowly, keep it at 80°C for 2 hours, dry and pulverize to obtain the product. ...

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Abstract

The invention discloses a method for preparing high-nitrogen-content, high-potassium-content and high-water-absorption resin by using carboxymethyl potato starch and hydrogen peroxide as raw materials by a one-pot method. The method is mainly characterized in that the carboxymethyl potato starch oxidized by the hydrogen peroxide is not required to be separated, washed or purified, the carboxymethyl potato starch oxidized by the hydrogen peroxide, acrylic acid for removing an inhibitor, potassium salt of the acrylic acid and acrylamide are heated in water bath under the protection effect of nitrogen, high-nitrogen-content, high-potassium-content and high-water-absorption resin is synthesized by the one-pot method, the maximum water absorption of the optimal product in 5,000 times of deionized water reaches 3,500 g / g, and the maximum potassium content can reach 12.6%. The high-water-absorption resin has the advantages that the carboxymethyl potato starch oxidized by the hydrogen peroxide is not required to be separated, purified or washed like the traditional oxidized carboxymethyl potato starch; and an initiator is not required to be added, meanwhile, the product has relatively high water absorption, nitrogen content and potassium content, therefore, the resin synthesized by the method is simple in technology and low in cost, the performance of the product is excellent, and particularly, owing to high water absorption, high nitrogen content and high potassium, the product is a dual-purpose good product for the agriculture and the gardening, and has high application and popularization value.

Description

technical field [0001] The invention relates to a preparation method of a functional polymer material-superabsorbent resin used in the fields of industry, agriculture, medical sanitation, construction industry, environmental governance, etc. A method for synthesizing superabsorbent resin with high nitrogen and potassium content in one pot as the main raw material. Background technique [0002] Superabsorbent resin is a new type of functional polymer material. Due to its unique water absorption and water retention properties, it has been widely used in medicine and health, agriculture, forestry and gardening, and desert control. The preparation of acrylic superabsorbent resin has a wide range of raw materials and a simple synthesis process. Starch belongs to the polymer of glucose, which is widely distributed in the seeds, roots and other tissues of many plants. It has a wide range of sources, and most of the plants that produce starch are renewable. The cost of raw mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/56C08F220/06C08F222/38
Inventor 温国华刘广华刘广梅李洪昕王佳钰蔺建波苏日他拉图苗秀秀陈超张建平
Owner INNER MONGOLIA UNIVERSITY
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