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 a

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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Example Embodiment

[0021] Example 1: Weigh 3.8 g of sodium hydroxide, measure 11.4 ml of deionized water, and prepare a sodium hydroxide solution with a concentration of 25%. Under the condition of ice-water bath cooling and stirring, neutralize 22.5g (21.5ml) acrylic acid of polymerization inhibitor. Weigh 7.5 g of acrylamide and measure 8 ml of deionized water to prepare a solution. Weigh 5.0 g of potato starch, measure 25.0 ml of deionized water, mix uniformly under stirring, and gelatinize the potato starch under heating (60°C-70°C). 86g potassium persulfate, gelatinized potato starch, acrylic acid and its sodium salt solution, and acrylamide solution were stirred at room temperature for 0.5h under the protection of nitrogen to make the reactants evenly mixed. Heat under stirring and control the heating speed to slowly increase the temperature of the water bath to make the graft copolymerization proceed fully. Stop stirring when the temperature reaches 55°C. Continue to heat up, keep it in ...

Example Embodiment

[0022] Example 2: Weigh 2.5 g of sodium hydroxide, measure 7.5 ml of deionized water, and prepare a sodium hydroxide solution with a concentration of 25%. Under the condition of ice-water bath cooling and stirring, neutralize 22.5g (21.5ml) acrylic acid of polymerization inhibitor. Weigh 7.5 g of acrylamide and measure 8 ml of deionized water to prepare a solution. Weigh 5.0 g of potato starch, measure 25.0 ml of deionized water, mix uniformly under stirring, and gelatinize the potato starch under heating (60°C-70°C). 86g potassium persulfate, gelatinized potato starch, acrylic acid and its sodium salt solution, and acrylamide solution were stirred at room temperature for 0.5h under the protection of nitrogen to make the reactants evenly mixed. Heat under stirring and control the heating speed to slowly increase the temperature of the water bath to make the graft copolymerization proceed fully. Stop stirring when the temperature reaches 55°C. Continue to heat up, keep it in a...

Example Embodiment

[0023] Example 3: Weigh 5.0 g of sodium hydroxide, measure 15.0 ml of deionized water, and prepare a sodium hydroxide solution with a concentration of 25%. Under the condition of ice-water bath cooling and stirring, neutralize 22.5g (21.5ml) acrylic acid of polymerization inhibitor. Weigh 7.5 g of acrylamide and measure 8 ml of deionized water to prepare a solution. Weigh 5.0 g of potato starch, measure 25.0 ml of deionized water, mix uniformly under stirring, and gelatinize the potato starch under heating (60°C-70°C). 86g potassium persulfate, gelatinized potato starch, acrylic acid and its sodium salt solution, and acrylamide solution were stirred at room temperature for 0.5h under the protection of nitrogen to make the reactants evenly mixed. Heat under stirring and control the heating speed to slowly increase the temperature of the water bath to make the graft copolymerization proceed fully. Stop stirring when the temperature reaches 55°C. Continue to heat up, keep it in ...

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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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