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Method for preparing super absorbent resin containing covalent nitrogen by using potato starch as raw material

A technology of potato starch and superabsorbent resin, which is applied in the field of preparing superabsorbent resin containing covalent nitrogen elements, which can solve the problems of low gel strength, complex production process, small variety and quantity, etc., achieve good performance and improve soil fertility Effect

Inactive Publication Date: 2010-02-03
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country has achieved certain results in the research of superabsorbent resins, but there are some problems, such as low water absorption of the resin, poor salt resistance, low gel strength after water absorption, complex production process, high product cost, etc. Industrial manufacturers produce The variety and quantity are also relatively small, and there are many tasks that people need to study in depth

Method used

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  • Method for preparing super absorbent resin containing covalent nitrogen by using potato starch as raw material
  • Method for preparing super absorbent resin containing covalent nitrogen by using potato starch as raw material
  • Method for preparing super absorbent resin containing covalent nitrogen by using potato starch as raw material

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: take by weighing 3.8g sodium hydroxide, measure and take 11.4ml deionized water, be made into the sodium hydroxide solution that concentration is 25%. Under the conditions of ice-water bath cooling and stirring, neutralize 22.5g (21.5ml) of the acrylic acid that removes the polymerization inhibitor. Weigh 7.5g of acrylamide and 8ml of deionized water to prepare a solution. Weigh 5.0 g of potato starch and 25.0 ml of deionized water, mix evenly under stirring conditions, and gelatinize the potato starch under heating (60°C-70°C). Stir 86g of potassium persulfate, gelatinized potato starch, acrylic acid and its sodium salt solution, and acrylamide solution at room temperature for 0.5 h under nitrogen protection, so that the reactants are evenly mixed. Heating under stirring, controlling the heating rate, increasing the temperature of the water bath slowly, so that the graft copolymerization reaction is fully carried out, and stopping stirring when the tempe...

Embodiment 2

[0022] Embodiment 2: take by weighing 2.5g sodium hydroxide, measure and take 7.5ml deionized water, be made into the sodium hydroxide solution that concentration is 25%. Under the conditions of ice-water bath cooling and stirring, neutralize 22.5g (21.5ml) of the acrylic acid that removes the polymerization inhibitor. Weigh 7.5g of acrylamide and 8ml of deionized water to prepare a solution. Weigh 5.0 g of potato starch and 25.0 ml of deionized water, mix evenly under stirring conditions, and gelatinize the potato starch under heating (60°C-70°C). Stir 86g of potassium persulfate, gelatinized potato starch, acrylic acid and its sodium salt solution, and acrylamide solution at room temperature for 0.5 h under nitrogen protection, so that the reactants are evenly mixed. Heating under stirring, controlling the heating rate, increasing the temperature of the water bath slowly, so that the graft copolymerization reaction is fully carried out, and stopping stirring when the temper...

Embodiment 3

[0023] Embodiment 3: take by weighing 5.0g sodium hydroxide, measure and take 15.0ml deionized water, be made into the sodium hydroxide solution that concentration is 25%. Under the conditions of ice-water bath cooling and stirring, neutralize 22.5g (21.5ml) of the acrylic acid that removes the polymerization inhibitor. Weigh 7.5g of acrylamide and 8ml of deionized water to prepare a solution. Weigh 5.0 g of potato starch and 25.0 ml of deionized water, mix evenly under stirring conditions, and gelatinize the potato starch under heating (60°C-70°C). Stir 86g of potassium persulfate, gelatinized potato starch, acrylic acid and its sodium salt solution, and acrylamide solution at room temperature for 0.5 h under nitrogen protection, so that the reactants are evenly mixed. Heating under stirring, controlling the heating rate, increasing the temperature of the water bath slowly, so that the graft copolymerization reaction is fully carried out, and stopping stirring when the tempe...

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Abstract

The method discloses a method for preparing super absorbent resin containing covalent nitrogen by using potato starch as the raw material, which comprises the following main processes: carrying out neutralization reaction between a sodium hydroxide solution and acrylic acid from which polymerization inhibitor is removed under the cooling of ice-water bath; preparing acrylamide into a solution; mixing potato starch with de-ionized water and heating the mixture for pasting; mixing the acrylic acid and the sodium salt solution thereof with the pasted potato starch and the acrylamide solution; adding persulfate, and stirring the mixture under the protection of nitrogen; heating the mixture by water bath to rise the temperature so as to ensure that the potato starch, the acrylamide, the acrylicacid and the sodium salt thereof generate graft copolymerization reaction under the protection of nitrogen; keeping the temperature for 1-2 hours in boiling water bath; baking the products in a baking oven to keep constant weight; and drying the baked products to obtain the super absorbent resin containing covalent nitrogen. Compared with other products on the market, the water absorption of thesuper absorbent resin is multiplied and the super absorbent resin contains nitrogen nutrition elements. The super absorbent resin has great effect on the water conservation, the desert control, the plant growth promotion and the like of soil in dry regions.

Description

technical field [0001] The invention relates to a method for preparing a superabsorbent resin used in agriculture, forestry, animal husbandry, gardening and daily necessities, in particular to a method for preparing a covalent nitrogen-containing superabsorbent resin with potato starch, acrylic acid and acrylamide as main raw materials. Background technique [0002] The excellent water absorption and water retention of superabsorbent resin make it widely used in many fields. Superabsorbent resin can be used for seedling raising, transplanting and seed coating of flowers and crops, so as to improve the survival rate of plants. Adding superabsorbent resin to the soil can change the aggregate structure of the soil, increase the water permeability and air permeability of the soil, and store the added water. It has attractive effects in soil moisture retention and desert control in arid areas. prospect. Japan and France have used super absorbent resins in the Middle East and No...

Claims

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Application Information

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IPC IPC(8): C08F251/00
Inventor 温国华郭淑霞康杰张小敏目仁更
Owner INNER MONGOLIA UNIVERSITY
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