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Novel technology for preparing high-potassium-content and high-water-absorption resin by using carboxymethyl potato starch and acrylamide as raw materials

A technology of potato starch and superabsorbent resin, which is applied in the field of simple preparation, can solve the problems of little industrialization, and achieve the effects of reducing energy consumption, high water absorption, and high potassium content

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

[0004] There are many preparation methods for superabsorbent resins, abundant synthetic raw materials, and different production processes. However, most of the research work on superabsorbent resins in China is still in the laboratory stage, and some have been transferred to the pilot stage, but there are few industrialized ones. But high-end products mainly rely on imports

Method used

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  • Novel technology for preparing high-potassium-content and high-water-absorption resin by using carboxymethyl potato starch and acrylamide as raw materials
  • Novel technology for preparing high-potassium-content and high-water-absorption resin by using carboxymethyl potato starch and acrylamide as raw materials
  • Novel technology for preparing high-potassium-content and high-water-absorption resin by using carboxymethyl potato starch and acrylamide as raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Weigh 25g of acrylamide, dissolve it in 25ml of deionized water, weigh 9.86g of potassium hydroxide, dissolve it in 15ml of deionized water, add the potassium hydroxide solution dropwise to the above acrylamide solution, and stir at room temperature Hydrolyze acrylamide; weigh 2.5g carboxymethyl potato starch and mix with 30ml deionized water evenly, mix the hydrolyzate of acrylamide and carboxymethyl potato starch mixture evenly, add 4ml of potassium persulfate with a concentration of 10mg / ml Solution, 6ml of N,N'-methylenebisacrylamide solution with a concentration of 2.5mg / ml, nitrogen gas, slowly heating to gradually increase the temperature of the reaction system, the polymerization reaction occurs at 44°C, and when the temperature rises to 80°C Keep it warm for 1.5 hours, then take out the product, dry and pulverize to obtain a super absorbent resin. The water absorption of the super absorbent resin prepared in this example in 5000 times deionized water ...

Embodiment 2

[0025] Example 2: Weigh 25g of acrylamide, dissolve it in 25ml of deionized water, weigh 9.86g of potassium hydroxide, dissolve it in 15ml of deionized water, add the potassium hydroxide solution dropwise to the above-mentioned acrylamide solution, and stir at room temperature Hydrolyze acrylamide; weigh 2.5g carboxymethyl potato starch and mix with 30ml deionized water, mix the acrylamide hydrolyzate and carboxymethyl potato starch mixture evenly, add 6ml of potassium persulfate with a concentration of 10mg / ml Solution, 6ml of N,N'-methylenebisacrylamide solution with a concentration of 2.5mg / ml, nitrogen gas, slowly heating to increase the temperature of the reaction system gradually, the polymerization reaction occurs at 36°C, and when the temperature rises to 80°C Keep it warm for 1.5 hours, then take out the product, dry and pulverize to obtain a superabsorbent resin. The water absorption of the superabsorbent resin prepared in this example is 1750g / g in 5000 times deioniz...

Embodiment 3

[0026] Example 3: Weigh 25g of acrylamide, dissolve it in 25ml of deionized water, weigh 9.86g of potassium hydroxide, dissolve it in 15ml of deionized water, add the potassium hydroxide solution dropwise to the above acrylamide solution, and stir at room temperature Hydrolyze acrylamide; weigh 2.5g carboxymethyl potato starch and mix with 30ml deionized water, mix the acrylamide hydrolyzate and carboxymethyl potato starch mixture evenly, add 9ml of potassium persulfate with a concentration of 10mg / ml Solution, 6ml of N,N'-methylenebisacrylamide solution with a concentration of 2.5mg / ml, nitrogen gas, slowly heating to gradually increase the temperature of the reaction system, the polymerization reaction occurs at 39°C, and when the temperature rises to 80°C Keep it warm for 1.5 hours, then take out the product, dry and pulverize to obtain a super absorbent resin. The water absorption of the super absorbent resin prepared in this example in 5000 times deionized water is 1350 g / ...

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Abstract

The invention discloses a method for synthesizing nitrogen-containing, potassium-containing and high-water-absorption resin by using carboxymethyl potato starch and acrylamide. The method is mainly characterized by comprising the following steps: firstly, hydrolyzing the acrylamide by using potassium hydroxide; then heating in water bath under the protection effect of nitrogen; and carrying out graft polymerization on the carboxymethyl potato starch and the partially hydrolyzed acrylamide at the temperature of 30-60 DEG C and preparing the high-water-absorption resin. The maximum water absorption of the optimal product in 5,000 times of deionized water can reach 3,500 g / g. Moreover, through a result of an orthogonal experiment, the product of which the water absorption reaches 3,575 g / g is obtained, and the potassium content of the product is 15.59%. The result and the condition of the orthogonal experiment are analyzed to obtain the sequence of factors which affect the water absorption of the nitrogen-containing, potassium-containing and high-water-absorption resin and are arrayed from large to small. The high-water-absorption resin has the advantages that the carboxymethyl potato starch as a matrix can be dissolved in water so that gelatinization is not required, and graft polymerization reaction temperature is low. Therefore, the high-water-absorption resin is simple in synthesize technology, easy to operate, low in performance and suitable for being produced in a large scale and popularized.

Description

technical field [0001] The invention relates to a preparation method of a functional polymer material-superabsorbent resin used in the fields of agriculture, forestry and gardening, physiological hygiene, daily chemical industry, construction industry, environmental management, etc. A new and simple preparation method for synthesizing superabsorbent resin with potassium oxide as the main raw material. Background technique [0002] Superabsorbent resin is a general term for a class of high molecular polymers that are neither soluble in water nor soluble in organic solvents and have good liquid absorption and water retention properties. It has a three-dimensional network structure of strong water-absorbing groups, which can quickly absorb and retain a large amount of water. It is a functional polymer material that integrates water absorption, water retention, and slow release. [0003] Compared with ordinary water-absorbing materials, such as sponge, silica gel, activated c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/56C08F222/38
Inventor 温国华张雨亭周硕硕王晨雪韩宗壮马贺成王晓莉陈超付渊柳青
Owner INNER MONGOLIA UNIVERSITY
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