Method for synthesizing super absorbent resin containing phosphorus and nitrogen by graft copolymerization reaction of potato starch organic phosphate

A technology of starch phosphate ester and superabsorbent resin, which is applied in the field of potato starch phosphate ester graft copolymerization into superabsorbent resin containing phosphorus and nitrogen, which can solve the problems of less research and production of modified starch, achieve good performance, increase income, increase The effect of stability

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

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Problems solved by technology

Potato resources are abundant in northern my country, starch production has been relatively common and solid foundation, but the research and production of modified starch is still less

Method used

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  • Method for synthesizing super absorbent resin containing phosphorus and nitrogen by graft copolymerization reaction of potato starch organic phosphate
  • Method for synthesizing super absorbent resin containing phosphorus and nitrogen by graft copolymerization reaction of potato starch organic phosphate
  • Method for synthesizing super absorbent resin containing phosphorus and nitrogen by graft copolymerization reaction of potato starch organic phosphate

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Embodiment 1

[0021] Embodiment 1: Weigh 5.0g sodium hydroxide, measure 11.0ml deionized water, be mixed with sodium hydroxide solution, neutralize 25.7g (24.5ml) to remove the acrylic acid of polymerization inhibitor under the condition of ice-water bath cooling and stirring , to obtain a solution of acrylic acid and its sodium salt. Dissolve 4.3 g of acrylamide with 11.1 ml of deionized water to prepare an aqueous solution of acrylamide. Weigh 25.0g of potato starch phosphate, measure 5.0ml of deionized water, mix evenly under stirring, add 87mg of potassium persulfate initiator, prepared acrylic acid and its sodium salt solution and acrylamide solution, and stir at room temperature for 0.5 h to make it evenly mixed. Introduce nitrogen and heat with stirring, while controlling the heating rate, so that the temperature of the water bath is slowly increased, so that the graft copolymerization reaction is fully carried out, and the stirring is stopped when the temperature reaches 60°C. Aft...

Embodiment 2

[0022] Embodiment 2: Weigh 4.3g sodium hydroxide, measure 11.0ml deionized water, be mixed with sodium hydroxide solution, neutralize 25.7g (24.5ml) to remove the acrylic acid of polymerization inhibitor under the condition of ice-water bath cooling and stirring , to obtain a solution of acrylic acid and its sodium salt. Dissolve 4.3 g of acrylamide with 11.1 ml of deionized water to prepare an aqueous solution of acrylamide. Weigh 5.0g of potato starch phosphate, measure 25.0ml of deionized water, mix evenly under stirring, add 85mg of potassium persulfate initiator, prepared acrylic acid and its sodium salt solution and acrylamide solution, and stir at room temperature for 0.5 h to make it evenly mixed. Introduce nitrogen and heat with stirring, while controlling the heating rate, so that the temperature of the water bath is slowly increased, so that the graft copolymerization reaction is fully carried out, and the stirring is stopped when the temperature reaches 60°C. Aft...

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Abstract

The invention discloses a method for synthesizing super absorbent resin containing phosphorus and nitrogen by the graft copolymerization reaction of potato starch organic phosphate, 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; respectively mixing potato starch organic phosphate and acrylamide with de-ionized water to obtain a potato starch organic phosphate solution and an acrylamide solution; mixing the prepared acrylicacid and the sodium salt solution with the potato starch organic phosphate solution and the acrylamide solution; adding an evocating agent persulfate; stirring the mixture for 0.5-1.0 hour to ensure that the mixture is uniformly mixed; heating the mixture by water bath and stirring under the protection of nitrogen; stopping stirring when reaching certain temperature; keeping the temperature for 1-2 hours in boiling water bath; stopping supplying nitrogen, taking the product out, and cutting the product into small pieces; drying the small pieces in a baking oven to keep constant weight, and crashing to obtain the super absorbent resin containing phosphorus and nitrogen. Compared with the similar products, the water absorption of the super absorbent resin is greatly enhanced; the super absorbent resin contains the nutrition elements of nitrogen and phosphorus, does not need pasting in comparison with the process of directly using starch and greatly improves the preparation process. The super absorbent resin has favorable development prospect in agriculture management, such as desert greening, water conservation, soil improvement, seedling transplantation and the like.

Description

technical field [0001] The invention relates to a method for grafting and co-polymerizing potato starch phosphate ester into phosphorus- and nitrogen-containing superabsorbent resin. This kind of superabsorbent resin with a large amount of water absorption or binding has a wide range of uses in agriculture, petroleum, medical and health, etc., especially in agriculture, such as desert greening, water and soil conservation, soil improvement, seedling transplanting, etc. Has a good development prospect. Background technique [0002] Superabsorbent resin, also known as superabsorbent, is a functional polymer electrolyte material that contains strong hydrophilic groups such as carboxyl and hydroxyl groups and has a three-dimensional cross-linked network structure. The performance of superabsorbent resin is far superior to traditional water-absorbent materials such as paper, cotton, sponge, etc. Its advantages and characteristics are as follows: it is insoluble in water and any ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00
Inventor 温国华杜青慧郭淑霞目仁更付渊张伟
Owner INNER MONGOLIA UNIVERSITY
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