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Method for synthesizing high water absorbent polymer by using potato starch xanthate and acrylamide

A technology of potato starch and superabsorbent resin, applied in the field of simple preparation, can solve the problems of low water absorption, complex production process, high production cost, etc., achieve high water absorption, low polymerization reaction temperature, and reduce energy consumption.

Inactive Publication Date: 2013-08-07
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are many preparation methods of superabsorbent resin, abundant synthetic raw materials, and different production processes, but there are many problems in the industrialized products, such as: low water absorption of the product, complicated production process, high production cost, and domestic high-quality high water absorption Resin products mostly rely on imports

Method used

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  • Method for synthesizing high water absorbent polymer by using potato starch xanthate and acrylamide
  • Method for synthesizing high water absorbent polymer by using potato starch xanthate and acrylamide
  • Method for synthesizing high water absorbent polymer by using potato starch xanthate and acrylamide

Examples

Experimental program
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Embodiment 1

[0037] Example 1: Weigh 3.94g sodium hydroxide, dissolve it in 52.5ml deionized water, weigh 17.5g acrylamide, add acrylamide to the above sodium hydroxide solution, stir at room temperature to hydrolyze acrylamide, weigh 2.5 g Potato starch xanthate and 30ml deionized water are mixed uniformly, the hydrolyzed solution of acrylamide and the potato starch xanthate mixture are mixed uniformly, and 8ml potassium persulfate solution with a concentration of 10mg / ml and 10ml with a concentration of 2mg are added / ml of N,N'-methylene bisacrylamide solution, flow in nitrogen, slowly heat to gradually increase the temperature of the reaction system, take out the product after reaching 60°C, dry and pulverize to obtain super absorbent resin, this example The water absorption capacity of the prepared super absorbent resin in 2500 times deionized water is 1590 g / g.

Embodiment 2

[0038] Example 2: The synthesis conditions are the same as in Example 1, except that 2.95g of sodium hydroxide is weighed, dissolved in 52.5ml of deionized water, 17.5g of acrylamide is weighed, and the acrylamide is added to the above sodium hydroxide solution. Stir at room temperature to hydrolyze acrylamide. The water absorption capacity of the super absorbent resin prepared in this example in 2500 times deionized water is 1700 g / g.

Embodiment 3

[0039] Example 3: The synthesis conditions are the same as in Example 1, except that 2.95g of sodium hydroxide is weighed, dissolved in 52.5ml of deionized water, 17.5g of acrylamide is weighed, and the acrylamide is added to the above sodium hydroxide solution. Stir at room temperature to hydrolyze acrylamide, and add 10 ml of potassium persulfate solution with a concentration of 10 mg / ml. The water absorption capacity of the super absorbent resin prepared in this example in 2500 times deionized water is 1590 g / g.

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Abstract

The invention discloses a method for synthesizing a high water absorbent polymer by using potato starch xanthate and acrylamide. The method is mainly characterized by comprising the following steps of: firstly hydrolyzing the acrylamide by using alkaline, and subsequently heating in water bath under the protection of nitrogen, so the starch xanthate and a part of the hydrolyzed acrylamide are subjected to graft polymerization at 35 to 45 DEG C so as to prepare the high water absorbent polymer. The maximum water absorbing capacity of an optimal product in deionized water of 2500 times can be 2160g / g, and the water absorbing capacity in deionized water of 10000 times can be 5000g / g; and meanwhile the high water absorbent polymer prepared by the method is high in nitrogen content. The methodfor preparing the high water absorbent polymer has the following advantages that the parent potato starch xanthate does not need to be gelatinized, the graft polymerization reaction is low in temperature, and high temperature reaction is not needed, so that the method for synthesizing the high water absorbent polymer provided by the invention is simple in process, easy to operate, low in cost andexcellent in product performance, so that the method is more applicable for scale production and popularization of products.

Description

Technical field [0001] The invention relates to a method for preparing super absorbent resin, a functional polymer material used in the fields of agriculture, forestry, horticulture, physiological sanitation, daily chemical industry, construction industry, environmental management, etc., especially potato starch xanthate, acrylamide, Sodium hydroxide or potassium hydroxide is a new and simple preparation method for synthesizing super absorbent resin as the main raw material. Background technique [0002] Super absorbent resin is a new type of three-dimensional network functional polymer material with lightly cross-linked structure developed in recent years. It can absorb water several hundred times to several thousand times its own weight, has good stability to light, heat, acid and alkali, and has good biodegradability. Super absorbent resin is widely used for its water absorption, water retention, responsiveness to external stimuli and its ability to complex heavy metal ions, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08F220/56C08F4/30
Inventor 温国华张思思徐楠那伟丹杨芳若张媛邢建霞
Owner INNER MONGOLIA UNIVERSITY
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