Method for preparing super absorbent resin through graft polymerization of hydrogen peroxide-oxidized potato starch

A technology of potato starch and super absorbent resin, which is applied in the field of simple preparation, can solve the problems of application value and application fields that have not been developed, and achieves the effects of reducing energy consumption, high water absorption of products and low reaction temperature

Inactive Publication Date: 2014-12-03
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]The application of superabsorbent resin is very extensive, and i

Method used

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  • Method for preparing super absorbent resin through graft polymerization of hydrogen peroxide-oxidized potato starch
  • Method for preparing super absorbent resin through graft polymerization of hydrogen peroxide-oxidized potato starch
  • Method for preparing super absorbent resin through graft polymerization of hydrogen peroxide-oxidized potato starch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: 5.56g of sodium hydroxide was weighed, dissolved in 25.00ml of deionized water, and 25.00g (23.80ml) of acrylic acid was neutralized with the above-mentioned sodium hydroxide solution under cooling in an ice-water bath. Weigh 5.00g hydrogen peroxide oxidized potato starch, 5.00mg N,N'-methylenebisacrylamide, measure 25.00ml deionized water, add them all into the reactor, pour the prepared acrylic acid and its sodium salt solution into the reactor and stirred at room temperature for 1.0h to make it evenly mixed. Stir and heat under the protection of nitrogen, while controlling the heating rate to slowly increase the temperature of the water bath, and stop stirring when the temperature reaches 50°C. Afterwards, gradually increase the temperature, and when the water in the water bath boils, continue heating to make it react within the temperature range for 1-2h, stop nitrogen flow, and cool to room temperature. The product was taken out, cut into small pieces, ...

Embodiment 2

[0024] Example 2: Weigh 6.94g of sodium hydroxide, dissolve it in 25.00ml of deionized water under cooling, and neutralize 20.00g (19.10ml) of acrylic acid with the above-mentioned sodium hydroxide solution under cooling in an ice-water bath. Weigh 5.00g of hydrogen peroxide oxidized potato starch, 5.00mg of N,N′-methylenebisacrylamide, measure 25.0ml of deionized water, add them all into the reactor, and pour the prepared acrylic acid and its sodium salt solution into the reactor and stirred at room temperature for 1.0h to make it evenly mixed. Stir and heat under the protection of nitrogen, while controlling the heating rate to slowly increase the temperature of the water bath, and stop stirring when the temperature reaches 48°C. Afterwards, gradually increase the temperature, and when the water in the water bath boils, continue heating to make it react within the temperature range for 1-2h, stop nitrogen flow, and cool to room temperature. The product was taken out, cut in...

Embodiment 3

[0025] Example 3: Weigh 6.66g of sodium hydroxide, dissolve it in 25.00ml of deionized water under cooling, and neutralize 25.00g (23.80ml) of acrylic acid with the above-mentioned sodium hydroxide solution under cooling in an ice-water bath. Weigh 5.00g hydrogen peroxide oxidized potato starch, 5.00mg N,N'-methylenebisacrylamide, measure 25.0ml deionized water, add them all into the reactor, pour the prepared acrylic acid and its sodium salt solution into the reactor and stirred at room temperature for 1.0h to make it evenly mixed. Stir and heat under the protection of nitrogen, and stop stirring when the temperature reaches 53°C. Afterwards, gradually increase the temperature, and when the water in the water bath boils, continue heating to make it react within the temperature range for 1-2h, stop nitrogen flow, and cool to room temperature. The product was taken out, cut into small pieces, and dried in an oven at 40°C-60°C. The water absorption capacity of the superabsorben...

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Abstract

The invention discloses a method for preparing a super absorbent resin through graft polymerization of hydrogen peroxide-oxidized potato starch. The method is mainly characterized by comprising the following steps: neutralizing acrylic acid by using an alkali solution under the cooling effect of an ice-water bath, mixing with the hydrogen peroxide-oxidized potato starch and deionized water, heating in a water bath in the presence of nitrogen, slowly heating to 45-55 DEG C and carrying out graft polymerization to obtain the super absorbent resin, wherein the maximum water absorbing capacity of 1g of best products is up to 4000g/g in the 7000 times deionized water. The method for preparing the super absorbent resin, disclosed by the invention, has the following advantages that an initiator is not needed to be added and the raw material per se can serve as the initiator, so that no any impurity is introduced; the raw materials are easily dissolved in water and gelatinization is not needed in the process of preparing the super absorbent resin, so that the synthesis process is simplified; the polymerization reaction temperature is low, so that the energy consumption can be reduced; and the products are high in water absorbing capacity and excellent in performance, so that the method is more suitable for scale production, application and popularization of the products.

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 hydroxide as the main raw material. Background technique [0002] Superabsorbent resin is a new type of three-dimensional network functional polymer material with lightly cross-linked structure developed in recent years. It can absorb hundreds to thousands of times its own weight in water, has good stability to light, heat, acid and alkali, and has good biodegradability. Superabsorbent resin is widely used for its water absorption, water retention, responsiveness to external stimuli and complexation ability to heavy metal ions, such as agriculture, forestry and horticulture, soil improvement, water and ferti...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F220/06C08F222/38
Inventor 温国华胡振华莫国莉杨永启王晓莉付渊陈超柳青周硕硕马贺成赵红霞
Owner INNER MONGOLIA UNIVERSITY
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