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Preparation method of Beta-cyclodextrin-based superabsorbent resin

A technology of superabsorbent resin and cyclodextrin, which is applied in the field of preparation of β-cyclodextrin-based superabsorbent resin, can solve the problems of less repeated use, narrow application range, and low water absorption rate, and achieve easy reuse , wide application range and high water absorption rate

Inactive Publication Date: 2010-08-25
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a method for preparing a β-cyclodextrin-based superabsorbent resin to solve the current problems of domestic water-absorbent resins such as narrow environmental application range, low water absorption rate, poor salt resistance, less repeated use times, and difficult desorption.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The preparation method of the β-cyclodextrin-based superabsorbent resin in this example adopts the inverse suspension emulsion polymerization method, and is specifically carried out according to the following steps: 1. Dissolve the β-cyclodextrin in In a certain amount of sodium hydroxide solution, the alkaline solution of β-cyclodextrin is obtained, and the amount of alkali is controlled so that the neutralization degree is 55% to 85%; 2. The alkaline solution of β-cyclodextrin is placed in the reactor , add cyclohexane, heat in a water bath at a certain temperature, stir and feed nitrogen; 3. Dissolve acrylic acid, acrylamide, initiator and crosslinking agent in deionized water respectively and pour them into two constant pressure dropping funnels, Obtain the monomer and initiator-crosslinking agent solution system; 4. Raise the temperature of the reactor to 45°C to 70°C, and under the protection of nitrogen, slowly drop the monomer and the initiator crosslinking solut...

Embodiment 2

[0016] 2β-cyclodextrin is dissolved in 2.2g of sodium hydroxide solution to obtain an alkaline solution of β-cyclodextrin, and the amount of alkali is controlled so that the neutralization degree of acrylic acid is 75%; the alkaline solution of β-cyclodextrin Place in a reactor, add 50mL cyclohexane, heat in a water bath at 50°C, stir and blow nitrogen; dissolve 0.75g of acrylic acid and 5.25g of acrylamide in deionized water and pour them into a constant pressure dropping funnel to obtain monomers System solution: Weigh 0.3% potassium persulfate and 0.05% N, N-methylene bisacrylamide, which account for the total mass percentage of the monomers, dissolve them with deionized water and stir evenly, then pour into the The initiator-crosslinking agent solution system was obtained in the liquid funnel; the reactor was heated to 58 °C, and under the protection of nitrogen, the monomer and initiator-crosslinking agent solution system were slowly added dropwise to the reactor for 2 hou...

Embodiment 3

[0018] Dissolve 2β-cyclodextrin in 2.4g of sodium hydroxide solution to obtain an alkaline solution of β-cyclodextrin, control the amount of alkali so that the degree of neutralization is 85%; place the alkaline solution of β-cyclodextrin in Add 50mL cyclohexane to the reactor, heat and stir in a water bath at 50°C, and blow nitrogen into it; dissolve 0.75g of acrylic acid and 5.25g of acrylamide in deionized water and pour them into a constant pressure dropping funnel to obtain a monomer system solution ; Weigh 0.3% potassium persulfate and 0.04% N, N-methylenebisacrylamide, which are 0.3% of the total mass percentage of the monomer, dissolve and stir evenly with deionized water and pour into the dropping funnel Initiator-crosslinking agent solution system was obtained; the reactor was heated to 58 ° C, and under the protection of nitrogen, the monomer and initiator-crosslinking agent solution system were slowly added dropwise to the reactor for 1.5 hours of polymerization rea...

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Abstract

The invention discloses a preparation method of Beta-cyclodextrin-based superabsorbent resin, and relates to a preparation method of superabsorbent resin, which comprises the following steps that: Beta-cyclodextrin serves as the raw material, and acrylic acid and acrylamide serve as the copolymerization reactants; first, the alkaline solution of Beta-cyclodextrin and cyclohexane are added into a reactor to be heated in water bath, fed with nitrogen and stirred; and then initiator, crosslinking agent, acrylic acid and acrylamide solution which are stirred uniformly are added into the reactor drip by drip to have polymerization reaction, and the superabsorbent resin is prepared through heat insulation, cooling, filtration and vacuum drying. The superabsorbent resin prepared by the method has good absorbency, the distilled water absorption rate is 1544g / g, the tap water absorption rate is 941g / g, and the 0.9 percent saline water absorption rate is 104g / g. In addition, the polymerization process is stable, simple and easy to operate, the reaction speed is higher and the efficiency is higher. The preparation method of Beta-cyclodextrin-based superabsorbent resin has high water absorption rate, wider scope of application to the environment and better salt tolerance, and is applicable to agriculture, water gardening, desert reclamation and the like.

Description

technical field [0001] The invention relates to a preparation method of β-cyclodextrin-based superabsorbent resin. Background technique [0002] Super absorbent resin (SAP) is a new type of functional polymer material developed in recent years. It can absorb water hundreds of times to thousands of times its own weight, has excellent water absorption and water retention, and has slow / controlled release. It is widely used in personal hygiene products, civil construction, industrial and agricultural production, and medical materials, and it is also used in food crops, cash crops, flowers and vegetables, fruit trees, lawn cultivation, desert improvement, etc., and has gradually become a water-saving agricultural technology system. an important component of . [0003] In 1961, Gugliemell of the Northern Research Institute of the United States Department of Agriculture prepared a superabsorbent resin through the study of starch grafted acrylonitrile. Subsequently, Fanta complete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/06C08F220/56C08F2/18C08B37/16
Inventor 黄占华张斌徐莉莉刘丽华
Owner NORTHEAST FORESTRY UNIVERSITY
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