Preparation method of high-saline-absorbency high-water-absorptivity resin

A technology of superabsorbent resin and salt water, which is applied in the production field of functional polymer materials, can solve problems such as poor salt resistance, and achieve the effects of increasing strength, reducing dosage, and using safely

Inactive Publication Date: 2016-04-13
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current superabsorbent resin products, especially synthetic polyacrylic resins, have a sharp drop in liquid absorption rate in the electrolyte solution due to the same ion shielding effect, showing poor salt resistance, and most of them in practical applications In the environment of electrolyte solution, such as urine, blood, and fertilizer water for agriculture and forestry, etc.

Method used

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  • Preparation method of high-saline-absorbency high-water-absorptivity resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 37.5g, 80% (weight) of acrylic acid solution, put it into a beaker, add 25.4g of water into the beaker; weigh 11g of alkali, prepare it into a 30% (weight) solution, and pour it into the acrylic acid solution under stirring Slowly add the alkali solution dropwise, after the dropwise addition is completed, cool to room temperature in an ice-water bath; add 0.3g, 5% (weight) N,N-methylenebisacrylamide solution, and stir well; when the above system is heated to 75°C, Add 0.09 g of ammonium persulfate solution, stir evenly and further heat the system to 95° C., polymerize for 5 minutes to obtain a gel-like substance. After the polymerization is completed, the gel is cut into granules with a particle size of 1 cm, placed in an electric blast drying oven at 195°C for 2 hours to dry to constant weight, then crushed, sieved with 30-80 meshes, and finally Mix the surface cross-linking agent evenly, and dry it in an electric blast drying oven at 140°C for 45 minutes to obta...

Embodiment 2

[0025] Weigh 37.5g, 80% (weight) of acrylic acid solution, put it into a beaker, add 20.4g of water into the beaker; weigh 11g of alkali, prepare it into a 30% (weight) solution, and pour it into the acrylic acid solution under stirring Slowly add the alkali solution dropwise, after the addition is completed, cool to room temperature in an ice-water bath; add 5g, 8% (weight) of inorganic nanosheet water dispersion colloid; add 0.3g, 5% (weight) of N, N-methylenebis Acrylamide solution, stir evenly; when the above system is heated to 70°C, add 0.09g of ammonium persulfate solution, stir evenly, further heat the system to 95°C, and polymerize for 5 minutes to obtain a gel-like substance. After the polymerization is completed, the gel is cut into granules with a particle size of 1 cm, placed in an electric blast drying oven at 195°C for 2 hours to dry to constant weight, then crushed, sieved with 30-80 meshes, and finally Mix the surface cross-linking agent evenly, and dry it in ...

Embodiment 3

[0027] Weigh 37.5g, 80% (weight) of acrylic acid solution, put it into a beaker, add 14.4g of water into the beaker; weigh 11g of alkali, prepare it into a 30% (weight) solution, and pour it into the acrylic acid solution under stirring Slowly add the alkali solution dropwise, after the addition is completed, cool to room temperature in an ice-water bath; add 10g, 8% (weight) of inorganic nanosheet water dispersion colloid; add 0.3g, 5% (weight) of N, N-methylenebis Acrylamide solution, stir evenly; when the above system is heated to 75°C, add 0.09g of potassium persulfate solution, stir evenly, continue to heat the system to 90°C, and polymerize for 5 minutes to obtain a gel-like substance. After the polymerization is completed, the gel is cut into granules with a particle size of 1 cm, and placed in an electric blast drying oven at 100°C for 3 hours to dry to constant weight, then crushed, sieved with 30-80 mesh, and finally Mix the surface crosslinking agent evenly, and dry...

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Abstract

The invention provides a preparation method of a high-saline-absorbency high-water-absorptivity resin, relating to the technical field of high-polymer material production. According to the method, high-purity acrylic acid is used as a monomer, N,N-methylene bis acrylamide is used as a crosslinking agent, and inorganic nanosheets are added in the preparation process; the nano sheets are introduced into the high-water-absorptivity resin, and the inorganic nanosheet surface has negative charges and large specific area, and thus, can adsorb and shield ions in the saline; and meanwhile, the nano sheets can be utilized to generate strong interactions with the adsorbed water, thereby enhancing the saline absorbency and water absorption retention rate of the high-water-absorptivity resin.

Description

technical field [0001] The invention relates to the technical field of production of functional polymer materials, in particular to a preparation method of a superabsorbent resin with a high saline absorption rate. Background technique [0002] Super Absorbent Polymer (SAP) is a new type of functional polymer material developed rapidly in the 1970s. It contains strong hydrophilic groups and has a three-dimensional network structure after moderate crosslinking. It is insoluble in water and also It is insoluble in organic solvents, can absorb hundreds or even thousands of times of its own total amount of water, and can absorb dozens of times its own weight of 0.9% NaCl solution. It is not easy to lose water under high pressure, and has good stability to light, heat and acid. Among them, polyacrylic acid superabsorbent resins are the most widely studied and applied due to their advantages of high water absorption, good safety performance, stable product quality and no corrupti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F222/38C08J3/12C08J7/12
CPCC08F220/06C08J3/12C08J7/12C08J2333/02C08F222/385
Inventor 朱爱萍张翠翠张星河宓露王颖
Owner YANGZHOU UNIV
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