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Method for preparing dual-parent nitrogen-containing super water absorbent resin from carboxymethyl starch and phosphate starch raw materials

A technology of carboxymethyl starch and superabsorbent resin, applied in the field of superabsorbent resin and its preparation, can solve the problem that the performance of superabsorbent resin cannot meet application requirements, etc., and achieve the effects of shortening production time, easy degradation, and simple synthesis process

Inactive Publication Date: 2012-01-11
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the continuous expansion of the application field of super absorbent resins, the performance of ordinary super absorbent resins can no longer meet the application requirements, and the development and research of super absorbent resins that can meet specific performance requirements has become a hot topic today.

Method used

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  • Method for preparing dual-parent nitrogen-containing super water absorbent resin from carboxymethyl starch and phosphate starch raw materials
  • Method for preparing dual-parent nitrogen-containing super water absorbent resin from carboxymethyl starch and phosphate starch raw materials
  • Method for preparing dual-parent nitrogen-containing super water absorbent resin from carboxymethyl starch and phosphate starch raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Dissolve 5.0 g of sodium hydroxide with 30.0 ml of deionized water, and neutralize 22.5 g (21.4 ml) of acrylic acid under conditions of cooling and stirring in an ice-water bath; dissolve 7.5 g of acrylamide with 40.0 ml of deionized water; Mix the neutralized acrylic acid and its sodium salt solution with the dissolved acrylamide solution, add 1.5g of carboxymethyl potato starch and 1.5g of phosphate ester potato starch, mix well under stirring, after the starch derivative is dissolved, add 70mg of over Potassium sulfate and 5ml of N,N'-methylenebisacrylamide solution with a concentration of 1mg / ml, stirred at room temperature for 0.5h, then fed nitrogen and started to heat slowly, allowing it to react at 60-75°C for 1.0h, Continue to heat up, keep warm in a boiling water bath for 1.5h, stop nitrogen flow, cool to room temperature, take out the product, dry, pulverize, and sieve to obtain the double matrix nitrogen-containing superabsorbent resin. The water a...

Embodiment 2

[0027] Embodiment 2: The experimental conditions are the same as in Example 1, except that 2.25 g of carboxymethyl potato starch and 0.75 g of phosphate ester potato starch are added, and the water absorption ratio of the product obtained in this embodiment is 1715 times.

Embodiment 3

[0028] Embodiment 3: The experimental conditions are the same as in Example 1, except that 2.0 g of carboxymethyl potato starch and 1.0 g of phosphate ester potato starch are added, and the water absorption ratio of the product obtained in this embodiment is 1600 times.

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Abstract

The invention provides a method for preparing dual-parent nitrogen-containing super water absorbent resin from carboxymethyl starch and phosphate starch serving as raw materials. In the method, the dual-parent nitrogen-containing super water absorbent resin is prepared by performing graft copolymerization on the carboxymethyl starch, the phosphate starch, acrylic acid, a sodium salt of the acrylic acid, acrylamide and the like. The resin is prepared by an aqueous solution polymerization method; a synthesizing process is simple; the energy consumption is low; and a product is easy to degrade, does not cause pollution on the environment, contains nitrogen and phosphorus needed by growth of plants and can be widely applied to the fields such as agriculture, forestry, gardening, prevention and control of desertification and the like.

Description

technical field [0001] The present invention relates to a superabsorbent resin and its preparation method, in particular to a method for preparing dual-matrix nitrogen-containing superabsorbent resin with carboxymethyl starch and phosphate starch as raw materials. The product is mainly suitable for agriculture, forestry, gardening and desertification prevention and other fields. Background technique [0002] Super Absorbent Polymer (SAP) is a new functional polymer material with excellent water absorption and water retention. It can absorb water hundreds or thousands of times its own weight and swell into a gel. Water will not precipitate under a certain range of pressure, and the resin gel after water absorption can restore its water absorption performance after drying, so it has important applications in many fields. For example, it is used in baby diapers, women's sanitary napkins, drug slow-release materials, etc. in medicine and hygiene. It is used as an oil-water sepa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08B31/08C08F222/38C08B31/06C08F220/06C08F251/00C08F2/10
Inventor 温国华林波吴小俊刘晓明张伟目仁更李东芳邢建霞
Owner INNER MONGOLIA UNIVERSITY