Method for synthesizing manganese dioxide nanowire composite super absorbent resin

A manganese dioxide nanometer, super absorbent resin technology, applied in manganese oxide/manganese hydroxide and other directions, can solve the problems of poor salt resistance, slow water absorption, gel strength, dispersion elasticity and poor surface dryness, etc. Achieve the effect of improving salt tolerance, reducing production costs, and improving thermal stability

Inactive Publication Date: 2013-10-23
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such superabsorbent resins generally have disadvantages such as poor salt tolerance, slow water absorption speed, poor gel strength, dispersibility, elasticity and surface dryness after water absorption.

Method used

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  • Method for synthesizing manganese dioxide nanowire composite super absorbent resin
  • Method for synthesizing manganese dioxide nanowire composite super absorbent resin
  • Method for synthesizing manganese dioxide nanowire composite super absorbent resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 4.1606g of potassium sulfate, 12.9076g of potassium persulfate, 4.1020g of manganese sulfate, add 100mL of deionized water, then put the mixed liquid into a stainless steel reactor lined with polytetrafluoroethylene, put the sealed reactor into Put it in an oven at 200°C for 24 hours. Then the generated solid is washed with distilled water at about 60°C for several times until the water-soluble impurities are removed, and dried at 80°C, the solid substance obtained is manganese dioxide nanowires, such as figure 1 As shown, the manganese dioxide nanowires were photographed by transmission electron microscopy figure 2 It can be seen that the diameter of the manganese dioxide nanowires is uniform.

[0019] Weigh 4.4445g of NaOH, dissolve it with 20mL of distilled water, place the beaker in an ice-water bath, slowly add 10mL of acrylic acid (AA) to the sodium hydroxide solution, adjust the neutralization degree of acrylic acid to 80%, and then add 6g of acrylamide (...

Embodiment 2

[0021] Take 4.1606g of potassium sulfate, 12.9076g of potassium persulfate, 4.1020g of manganese sulfate, add 100mL of deionized water, then put the mixed liquid into a stainless steel reactor lined with polytetrafluoroethylene, put the sealed reactor into Put it in an oven at 150°C for 24 hours. Then the resulting solid was washed with distilled water at about 60°C for several times until the water-soluble impurities were removed, and then dried at 80°C to obtain a solid substance that was manganese dioxide nanowires.

[0022] Weigh 1.556g of NaOH, dissolve it with 20mL of distilled water, place the beaker in an ice-water bath, slowly add 4mL of acrylic acid (AA) to the sodium hydroxide solution, adjust the neutralization degree of acrylic acid to 70%, and then add 6g of acrylamide (AM) and 2g of 2-acrylamide-2-methylpropanesulfonic acid (AMPS), stir evenly, then add 0.24g of manganese dioxide nanowires, 0.006g of cross-linking agent (N,N-methylene base bisacrylamide), 0.024...

Embodiment 3

[0024] 1 Preparation of manganese dioxide nanowires

[0025] Take 4.1606g of potassium sulfate, 12.9076g of potassium persulfate, 4.1020g of manganese sulfate, add 100mL of deionized water, then put the mixed liquid into a stainless steel reactor lined with polytetrafluoroethylene, put the sealed reactor into Put it in an oven at 180°C for 22 hours. Then the resulting solid was washed with distilled water at about 60°C for several times until the water-soluble impurities were removed, and then dried at 80°C to obtain a solid substance that was manganese dioxide nanowires.

[0026] Weigh 3.3334g of NaOH, dissolve it with 20mL of distilled water, place the beaker in an ice-water bath, slowly add 8mL of acrylic acid (AA) to the sodium hydroxide solution, adjust the neutralization degree of acrylic acid to 75%, and then add 6g of acrylamide (AM) and 2g of 2-acrylamide-2-methylpropanesulfonic acid (AMPS), stir evenly, then add 0.48g of manganese dioxide nanowires, 0.0112g of cross...

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Abstract

The invention discloses a method for synthesizing a manganese dioxide nanowire composite super absorbent resin. The method mainly comprises the following steps of: preparing a manganese dioxide nanowire through a hydrothermal method; taking three resins such as acrylic acid, acrylamide and 2-acrylamide-2-methyl propanesulfonic acid, the prepared manganese dioxide nanowire, a crosslinking agent N,N'-methylene bisacrylamide and an initiator potassium persulfate as raw materials to synthesize a composite resin; adding the acrylic acid into an ice bath, adding the acrylamide and 2-acrylamide-2-methyl propanesulfonic acid for uniformly stirring, sequentially adding the manganese dioxide nanowire, the crosslinking agent and the initiator, reacting at the temperature of 60-70 DEG C for 4 hours in a staged temperature rise mode, and drying the obtained product in a constant-temperature drying box at the temperature of 80 DEG C. According to the composite resin, the salt tolerance, water absorption rate, gel strength, heat stability, water-retaining property and the like of the resin can be effectively improved, the saline water absorption rate of the composite resin is improved by 25 percent compared with that of the acrylic acid and acrylamide type super absorbent resin, and the lead ion adsorbing capacity is 6.139mg/g.

Description

technical field [0001] The invention relates to a preparation method of a functional polymer material. Background technique [0002] Superabsorbent resin is a functional high molecular polymer with low cross-linked three-dimensional network structure developed in recent years. Since the superabsorbent resin contains strong hydrophilic groups, such as carboxyl, amide, ester, etc., it can quickly absorb dozens or even thousands of times its own weight of water or dozens of times of salt solution through hydration to form a It is gel-like and has good water retention performance. It has been widely used in agriculture, forestry, daily chemical industry, gardening, environmental protection and other fields, and has broad application prospects. [0003] Superabsorbent resins can be divided into three categories according to chemical raw materials: (1) starch-based superabsorbent resins, the monomers for graft copolymerization with starch are mainly hydrophilic and vinyl monomers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/06C08F220/58C08F2/44C08K7/00C08K3/22C01G45/02
Inventor 李秋荣刁萌萌肖海燕王锦侯琦
Owner YANSHAN UNIV
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