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

The technology of potato starch and superabsorbent resin is applied in the field of simple preparation, can solve the problems of low water absorption ratio, complicated production process and high production cost, and achieves the effects of high water absorption, low polymerization reaction temperature and reduced energy consumption.

Inactive Publication Date: 2012-11-14
INNER MONGOLIA UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 prod

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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Effect test

Embodiment 1

[0037] Example 1: Weigh 3.94g of sodium hydroxide, dissolve it in 52.5ml of deionized water, weigh 17.5g of acrylamide, add acrylamide to the above sodium hydroxide solution, stir at room temperature to hydrolyze the acrylamide, weigh 2.5g g potato starch xanthate and 30ml of deionized water are mixed evenly, the hydrolyzate of acrylamide is mixed with the potato starch xanthate mixture evenly, and 8ml of potassium persulfate solution with a concentration of 10mg / ml is added, and the concentration of 10ml is 2mg / ml of N,N'-methylene bisacrylamide solution, nitrogen gas was introduced, and the temperature of the reaction system was gradually increased by slow heating. After reaching 60°C, the product was taken out, dried and pulverized to obtain a superabsorbent resin. In this example The water absorption of the prepared superabsorbent resin in 2500 times deionized water was 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 acrylamide is added to the above-mentioned sodium hydroxide solution, Stir at room temperature to hydrolyze the acrylamide, and the water absorption of the superabsorbent 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 acrylamide is added to the above-mentioned sodium hydroxide solution, Stir at room temperature to hydrolyze acrylamide, add 10ml of potassium persulfate solution with a concentration of 10mg / ml, the water absorption of the superabsorbent resin prepared in this example in 2500 times deionized water is 1590g / 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 preparation method of a functional polymer material-superabsorbent resin used in the fields of agriculture, forestry and gardening, physiological hygiene, daily chemical industry, construction industry, environmental management, etc., especially potato starch xanthate, acrylamide, A new and simple preparation method for synthesizing superabsorbent resin with sodium hydroxide or potassium hydroxide as the main raw material. Background technique [0002] Superabsorbent resin is a new type of three-dimensional network functional polymer material with lightly cross-linked structure developed in recent years. It can absorb hundreds to thousands of times its own weight in water, has good stability to light, heat, acid and alkali, and has good biodegradability. Superabsorbent resin is widely used for its water absorption, water retention, responsiveness to external stimuli and complexation ability to heavy metal ions, such as agric...

Claims

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Application Information

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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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