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Method for preparing double-matrix nitrogen and potassium-containing super absorbent resin from carboxymethyl starch and phosphate starch raw materials

A technology of carboxymethyl starch and superabsorbent resin, which is applied in the field of superabsorbent resin and its preparation, can solve the problems that the performance of superabsorbent resin cannot meet the application requirements, and achieve the effects of shortening production time, easy degradation, and promoting plant growth

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 double-matrix nitrogen and potassium-containing super absorbent resin from carboxymethyl starch and phosphate starch raw materials
  • Method for preparing double-matrix nitrogen and potassium-containing super absorbent resin from carboxymethyl starch and phosphate starch raw materials
  • Method for preparing double-matrix nitrogen and potassium-containing super absorbent resin from carboxymethyl starch and phosphate starch raw materials

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Example 1: Dissolve 7.0g of potassium hydroxide with 25.0ml of deionized water, and neutralize 22.5g (21.4ml) of acrylic acid under cooling and stirring in an ice-water bath; dissolve 7.5g of acrylamide with 42.0ml of deionized water; neutralize Mix the good acrylic acid and its potassium salt solution with the dissolved acrylamide solution, add 1.5g carboxymethyl potato starch and 1.5g phosphate potato starch, stir for 0.5h, after mixing evenly, add 70mg potassium persulfate and 3ml concentration of 1mg / ml of N,N'-methylenebisacrylamide solution, stirred at room temperature for 0.5h, then passed nitrogen gas and began to slowly heat in a water bath, allowing it to react at 60-75°C for 1.0h, continue to heat up, and then Insulate 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 a dual matrix nitrogen- and potassium-containing superabsorbent resin. The water absorption ratio of the p...

Embodiment 2

[0027] Embodiment 2: The experimental conditions are the same as in Example 1, except that 2.4 g of carboxymethyl potato starch and 0.6 g of phosphate ester potato starch are added, and the water absorption ratio of the product obtained in this embodiment is 1700 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 1620 times.

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Abstract

The invention provides a method for preparing double-matrix nitrogen and potassium-containing super absorbent resin from carboxymethyl starch and phosphate starch serving as raw materials. By performing grafting copolymerization on the carboxymethyl starch, the phosphate starch, acrylic acid and potassium salt thereof, acrylamide and the like, the double-matrix nitrogen and potassium-containing super absorbent resin is prepared by the method. Production is performed by an aqueous solution polymerization method, so that the synthesis process is simple, and energy consumption is low; and products are easy to degrade, do not pollute the environment, contain nitrogen, phosphorus and potassium which are needed by plants during growth, 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- and potassium-containing superabsorbent resin with carboxymethyl starch and phosphate starch as raw materials. The product is mainly suitable for agriculture, forestry and gardening and desertification control. 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 separa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00
Inventor 温国华林波李延楠杜静静目仁更张伟李东芳邢建霞
Owner INNER MONGOLIA UNIVERSITY