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Method for preparing super absorbent resin by using carboxymethyl potato starch as raw material

A technology for potato starch and superabsorbent resin, which is applied in the field of preparing superabsorbent resin, can solve the problems of low water absorption ratio, complex production process, low gel strength, etc., and achieves the effects of increasing income, simplifying preparation process and good performance.

Active Publication Date: 2010-11-17
广西珅信科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although my country has achieved certain results in the research of superabsorbent resins, compared with foreign countries, there is still a considerable gap, such as low water absorption of resins, poor salt resistance, low gel strength after water absorption, complex production processes, high product cost

Method used

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  • Method for preparing super absorbent resin by using carboxymethyl potato starch as raw material
  • Method for preparing super absorbent resin by using carboxymethyl potato starch as raw material
  • Method for preparing super absorbent resin by using carboxymethyl potato starch as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: Weigh 23.31g sodium hydroxide, measure 10.0ml deionized water, prepare sodium hydroxide solution, under the condition of ice-water bath cooling and stirring, neutralize 60g (57.1ml) to remove the acrylic acid of polymerization inhibitor . Weigh 5.0g of carboxymethyl potato starch, measure 50.0ml of deionized water, mix evenly under stirring, add 65mg of potassium persulfate initiator, 0.5mg of N, N'-methylenebisacrylamide crosslinking agent and prepared acrylic acid and its sodium salt solution, stirred at room temperature for 0.5h to make it evenly mixed. Heating under stirring, while controlling the heating rate, so that the temperature of the water bath rises slowly, so that the graft copolymerization reaction is fully carried out, and the stirring is stopped when the graft copolymerization starts. Afterwards, the temperature was gradually raised, and when it reached the boiling water bath, continue heating to make it react within the temperature range...

Embodiment 2

[0027]Embodiment 2: Weigh 19.98g sodium hydroxide, measure 10.0ml deionized water, be mixed with sodium hydroxide solution, under the condition of ice-water bath cooling and stirring, neutralize 60.0g (57.1ml) to remove polymerization inhibitor acrylic acid. Weigh 5.0g of carboxymethyl potato starch, measure 50.0ml of deionized water, mix evenly under stirring, add 65mg of potassium persulfate initiator, 0.5mg of N, N'-methylenebisacrylamide crosslinking agent and prepared Acrylic acid and its sodium salt solution were stirred at room temperature for 0.5h to make them evenly mixed. Heating under stirring, controlling the heating speed, increasing the temperature of the water bath slowly, so that the graft copolymerization reaction is fully carried out, and stopping the stirring when the graft copolymerization reaction starts. Continue to raise the temperature gradually, and when it reaches the boiling water bath, continue heating to keep it in the temperature range for 1-2h, ...

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Abstract

The invention discloses a method for preparing super absorbent resin by using carboxymethyl potato starch as the raw material, which comprises the following main processes: carrying out neutralization reaction between a sodium hydroxide solution and acrylic acid from which polymerization inhibitor is removed under the cooling of ice-water bath; mixing carboxymethyl potato starch with de-ionized water; mixing the prepared acrylic acid and the sodium salt solution thereof with the carboxymethyl potato starch solution; adding an evocating agent persulfate and a cross-linking agent N,N'- methylene-bisacrylamide; stirring the mixture under room temperature; heating the mixture by water bath to rise the temperature gradually so as to ensure that the carboxymethyl potato starch and the acrylic acid and the sodium salt thereof generate graft copolymerization reaction under the protection of nitrogen; keeping the temperature of the reaction; drying and crashing to obtain the super absorbent resin by using carboxymethyl potato starch as the raw material. Compared with similar products, the water absorption of the super absorbent resin is greatly enhanced, the process of pasting is omitted in comparison with the process of using starch as the raw material and the preparation process is greatly improved. The super absorbent resin has great effect on the water conservation, the production of the physical hygiene sundries, the environmental improvement, the desert control, the plant growth promotion and the like of soil in dry regions.

Description

technical field [0001] The present invention relates to the preparation method of superabsorbent resin used in fields such as agriculture, forestry and gardening, desertification control, environmental protection, civil engineering, industrial supplies, daily necessities, etc. The invention discloses a method for preparing a superabsorbent resin with bisacrylamide as the main raw material. Background technique [0002] The excellent water absorption and water retention properties of superabsorbent resin make it widely used in many fields. Adding superabsorbent resin to the soil can change the aggregate structure of the soil, increase the water permeability and air permeability of the soil, and store the added water. It has attractive effects in soil moisture retention and desert control in arid areas. prospect. Now Japan and France have used super absorbent resins in the Middle East and North Africa to implement the plan to turn deserts into oases. The use of superabsorbe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08K5/20
Inventor 温国华付渊目仁更杜青慧张伟
Owner 广西珅信科技有限公司
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