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Method for preparing double-parent potassium-containing super absorbent resin from carboxymethyl starch and starch phosphate serving as raw materials

A technology of carboxymethyl starch and starch phosphate, which is applied in the field of superabsorbent resin preparation, can solve the problems of long production process, difficulty in industrialization, and high production cost, and achieve the effects of accelerating growth, accelerating cell division, and improving strength

Inactive Publication Date: 2011-01-19
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the domestic superabsorbent resin production process is long, the operation is complicated, the production cost is high, and it is difficult to realize industrialization
Moreover, the product is susceptible to microbial decomposition and mildew during use, and loses its ability to absorb and retain water.

Method used

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  • Method for preparing double-parent potassium-containing super absorbent resin from carboxymethyl starch and starch phosphate serving as raw materials
  • Method for preparing double-parent potassium-containing super absorbent resin from carboxymethyl starch and starch phosphate serving as raw materials
  • Method for preparing double-parent potassium-containing super absorbent resin from carboxymethyl starch and starch phosphate serving as raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: Weigh 6.5g potassium hydroxide, measure 20.0ml deionized water, be mixed with potassium hydroxide solution, under ice-water bath cooling and stirring, neutralize 21.0g (20.0ml) acrylic acid (neutralization degree is 40 %). Weigh 1.50g carboxymethyl potato starch and 1.50g potato starch phosphate, measure 27.0ml deionized water, mix evenly under stirring, add neutralized acrylic acid and its potassium salt solution, then add 70mg potassium persulfate as trigger and 8.00ml of N,N′-methylenebisacrylamide solution with a concentration of 1mg / ml as the crosslinking agent, stirred under nitrogen protection and heated in a water bath while controlling the heating rate to slowly increase the temperature of the water bath. At 65 ° C, the viscosity of the reactant began to increase, and the stirring was stopped. Thereafter, the temperature was gradually raised, and when the temperature of the water bath was 90°C-96°C, the heating was continued to keep it in this te...

Embodiment 2

[0026] Embodiment 2: The implementation conditions are the same as in Example 1, except that the potassium hydroxide consumption is 7.5g, the acrylic acid consumption is 24.0g (22.8ml), and the stirring is stopped at 67° C. After the reaction, the acrylic acid consumption is 24.0g. The matrix contains potassium superabsorbent resin, and the deionized water absorption capacity of this product is 1400g / g.

Embodiment 3

[0027] Embodiment 3: The implementation conditions are the same as in Example 1. The difference is that the amount of potassium hydroxide is 5.6g, and the amount of acrylic acid is 18.0g (17.1ml). Stirring is stopped at 65°C. After the reaction, the amount of acrylic acid is 18.0g. The matrix contains potassium superabsorbent resin, and the deionized water absorption capacity of this product is 1210g / g.

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Abstract

The invention discloses a method for a double-parent potassium-containing super absorbent resin. The method mainly comprises the following process steps of: under the cooling action of an ice-water bath, performing a neutralization reaction on solution of potassium hydroxide and acrylic acid from which a polymerization inhibitor is removed; mixing carboxymethyl starch, starch phosphate and deionized water; adding the acrylic acid and sylvite solution thereof, potassium persulfate serving as an initiator and solution of N,N'-methylene bisacrylamide serving as a cross-linking agent; stirring under the protection of nitrogen gas and heating in a water bath so as to perform graft polymerization on the carboxymethyl starch, the starch phosphate, the acrylic acid and sylvite thereof; and reacting while preserving heat, drying and grinding so as to obtain the double-parent potassium-containing super absorbent resin taking the carboxymethyl starch and the starch phosphate as raw materials. The super absorbent resin prepared by the method has high water absorption, contains nutrient elements such as potassium and phosphorus and has wide application prospect in the aspects of water conservation of soil, desertification control, promotion of plant growth and the like.

Description

technical field [0001] The present invention relates to the preparation method of superabsorbent resin used in the fields of agriculture, forestry, animal husbandry and horticulture, especially refers to the preparation of dual matrix containing potassium element by using carboxymethyl starch, starch phosphate, acrylic acid and potassium hydroxide as main raw materials The method of super absorbent resin. Background technique [0002] Superabsorbent resin is a low-crosslinked or partially crystalline polymer with many hydrophilic groups. It has extremely high water absorption and water retention. It has been widely used in industry, agriculture, food processing, medical and health, Daily chemicals and environmental protection and other fields. [0003] Super absorbent resin is a new type of functional polymer material developed in the 1960s. Since the 1990s, the research on superabsorbent resin has advanced by leaps and bounds, and the United States, Japan, Russia, Israel,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00
Inventor 温国华李东芳邢建霞高树树张伟目仁更林波张媛
Owner INNER MONGOLIA UNIVERSITY
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