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

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

Active Publication Date: 2010-02-03
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] Example 1: Weigh 23.31g sodium hydroxide, measure 10.0ml deionized water, prepare sodium hydroxide solution, and neutralize 60g (57.1ml) acrylic acid to remove polymerization inhibitor under the condition of ice-water bath cooling and stirring . Weigh 5.0g of carboxymethyl potato starch, measure 50.0ml of deionized water, mix well under stirring, add 65mg of potassium persulfate initiator, 0.5mg of N,N′-methylenebisacrylamide crosslinker and the prepared The solution of acrylic acid and its sodium salt in the mixture was stirred at room temperature for 0.5h to make it evenly mixed. Heat under stirring while controlling the heating speed to slowly increase the temperature of the water bath to make the graft copolymerization proceed fully, and stop stirring when the graft copolymerization starts. After that, the temperature is gradually increased, and when it reaches the boiling water bath, continue to heat to make it react within the temperature range for 1-2 hours, stop...

Embodiment 2

[0027] Example 2: Weigh 19.98g of sodium hydroxide, measure 10.0ml of deionized water, prepare a sodium hydroxide solution, and neutralize 60.0g (57.1ml) of the polymerization inhibitor under the conditions of cooling and stirring in an ice water bath acrylic acid. Weigh 5.0g of carboxymethyl potato starch, measure 50.0ml of deionized water, mix well under stirring, add 65mg of potassium persulfate initiator, 0.5mg of N,N′-methylenebisacrylamide crosslinker and the prepared The solution of acrylic acid and its sodium salt in the mixture was stirred at room temperature for 0.5h to make it evenly mixed. Heat under stirring and control the heating speed to slowly increase the temperature of the water bath so that the graft copolymerization reaction can proceed fully. When the graft copolymerization reaction starts, stop stirring. Continue to gradually increase the temperature. When it reaches the boiling water bath, continue to heat to keep it in this 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 neutralizationreaction 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 incomparison 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 a preparation method of super absorbent resin used in the fields of agriculture, forestry and horticulture, desertification prevention and control, environmental protection, civil engineering, industrial supplies, daily necessities, etc., in particular to carboxymethyl potato starch, acrylic acid and N, N'-methylene Bisacrylamide is the main raw material to prepare super absorbent resin. Background technique [0002] The excellent water absorption and water retention of superabsorbent resins make it widely used in many fields. Adding super absorbent 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, which is attractive in soil moisture retention in arid areas and desert control. prospect. Now Japan and France have used super absorbent resins in the Middle East and North Africa to implement plans to turn deserts into ...

Claims

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Application Information

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Patent Type & Authority Applications(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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