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Preparation method of salt-tolerance controlled-release high-water-absorption resin with hydrophobic chain segments

A technology of superabsorbent resin and hydrophobic segment, which is applied in the field of preparation of salt-resistant slow-release superabsorbent resin to achieve excellent performance, improved water retention rate, and reduced sensitivity

Inactive Publication Date: 2012-08-15
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, polyacrylic superabsorbent resins occupy a dominant position in the market due to the abundant and easy-to-obtain raw materials and simple preparation, but acrylic superabsorbent resins have many disadvantages, especially poor salt resistance

Method used

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  • Preparation method of salt-tolerance controlled-release high-water-absorption resin with hydrophobic chain segments
  • Preparation method of salt-tolerance controlled-release high-water-absorption resin with hydrophobic chain segments
  • Preparation method of salt-tolerance controlled-release high-water-absorption resin with hydrophobic chain segments

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Slowly add 2.0 g of carboxymethyl cellulose powder into a 250 mL three-necked flask filled with 120 g of distilled water under stirring conditions to form a carboxymethyl cellulose solution. Add 0.32g of initiator potassium persulfate, stir at 40°C for 10 minutes, then add 4.04g of acrylic acid, 11.96g of acrylamide, 0.22g of acrylic hydrophobic monomer lauryl methacrylate and 0.11g of crosslinking agent α-ring Add dextrin into a three-necked flask, adjust the pH of the system to 2.3 with sodium hydroxide, stir at a high speed to make it evenly dispersed, raise the temperature to 70°C, and keep the reaction for 2.5 hours. After the reaction, the product was taken out and dried at low temperature to constant weight.

Embodiment 2

[0016] Slowly add 2.5 g of carboxymethyl cellulose powder into a 250 mL three-neck flask containing 130 g of distilled water under stirring to form a carboxymethyl cellulose solution. Add 0.4g of initiator ammonium persulfate, stir at 40°C for 10 minutes, then add 6.45g of acrylic acid, 9.55g of acrylamide, 0.48g of acrylic hydrophobic monomer octadecyl methacrylate and 0.16g of crosslinking agent N-hydroxy Add methacrylamide into a three-necked flask, adjust the pH of the system to 2.0 with sodium hydroxide, stir at high speed to make it evenly dispersed, raise the temperature to 65°C, and keep the reaction for 2 hours. After the reaction, the product was taken out and dried at low temperature to constant weight.

Embodiment 3

[0018] Slowly add 2.3g of carboxymethylcellulose powder into a 250mL three-neck flask containing 125g of distilled water under stirring to form a carboxymethylcellulose solution. Add 0.3g of initiator potassium persulfate, stir at 40°C for 10 minutes, then shrink 5.25g of acrylic acid, 10.75g of acrylamide, 0.16g of acrylic hydrophobic monomer tetradecyl methacrylate and 0.08g of crosslinking agent polypropylene glycol Glyceryl ether was added into a three-necked flask, the pH of the system was adjusted to 2.5 with sodium hydroxide, the mixture was stirred at high speed to make it evenly dispersed, the temperature was raised to 75°C, and the reaction was kept for 3 hours. After the reaction, the product was taken out and dried at low temperature to constant weight.

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Abstract

The invention relates to a preparation method of salt-tolerance controlled-release high-water-absorption resin with hydrophobic chain segments. At present, acrylic-acid-series high-water-absorption resin has many defects and particularly has the defects that the salt tolerance is poor and the water absorbing capacity is easy to be weakened remarkably and normally is weakened to dozens of times from hundreds of times under the action of metal ions, therefore, the improvement of the salt tolerance of the high-water-absorption resin has significance. According to the invention, the high-water-absorption resin with a three-dimensional cross-linked network is formed through copolymerization of acrylic-acid hydrophobic monomers such as butyl methacrylate, iso-octyl methacrylate, n-decyl methacrylate, lauryl methacrylate, lauryl methacrylate or octadecyl methacrylate with acrylic acid, acrylic amide and carboxymethy cellulose under the existence of initiator and cross-linking agent. Compared with the high-water-absorption resin without the hydrophobic chain segments, the high-water-absorption resin disclosed by the invention has the advantages that the magnification on absorption of 0.9% sodium chloride solution is improved by 89.28%, and the water retention is improved by 13.15%.

Description

Technical field: [0001] The present invention involves a preparation method of salt -resistant slow -release high -absorbing resin, and specially involves a method of preparation of salt -resistant and medium -sized high -absorbing resin with a hydrophobic chain segment. technical background: [0002] High -absorbent resin is a new functional polymer material containing a strong pro -water base and a three -dimensional network cross -linking structure. Its water absorption can usually reach dozens of times or even thousands of times of its own weight.It is not easy to lose water under conditions, so it is widely used in many fields such as sanitary materials, medical supplies, daily necessities, soil improvement materials and oil mining.Acrylic hydrophilic resin mainly refers to a diversified cluster formed by a polymer formed by acrylic, acrylic and cross -linked agent or acrylic acid and other organic and inorganic objects [Chen Y., LIU Y. F., TANG H. L., & Tan H. STUDYAt pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/02C08F220/56C08F220/06C08F220/18C08J3/24C08L51/02
Inventor 鲍艳马建中吴喜元吴成兰喻佳宇
Owner SHAANXI UNIV OF SCI & TECH
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