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Preparation method and application of polyacrylic acid hydrogel adsorbing material

An adsorption material, polyacrylic acid technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problems of poor mechanical strength, low adsorption performance, long polymerization time, etc., and achieve the conditions required for the reaction Less, effective and fast removal, simple synthesis method

Inactive Publication Date: 2017-04-05
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most adsorbent materials have low adsorption performance, poor mechanical strength and are difficult to recycle. Polyacrylic acid hydrogel occupies an important position due to its large number of carboxyl groups, good chemical stability and strong solvent resistance.
[0003] The traditional polyacrylic acid hydrogel synthesis method needs to be carried out under nitrogen protection, the polymerization time is long, and the cost is high, which is not conducive to popularization and application

Method used

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  • Preparation method and application of polyacrylic acid hydrogel adsorbing material
  • Preparation method and application of polyacrylic acid hydrogel adsorbing material
  • Preparation method and application of polyacrylic acid hydrogel adsorbing material

Examples

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Effect test

Embodiment 1

[0025] A preparation method of a polyacrylic acid hydrogel adsorption material is as follows: respectively preparing an acrylic acid solution, an ammonium persulfate solution and a sodium hydrogen sulfite solution, and dissolving N,N'-methylenebisacrylamide in the acrylic acid solution, Then add ammonium persulfate solution and sodium bisulfite solution, add water to dilute to obtain a mixed solution, in the mixed solution, the mass fraction of acrylic acid is 30%, and the mass fraction of N,N'-methylenebisacrylamide is 1% , the mass fraction of ammonium persulfate is 0.42%, and the mass fraction of sodium bisulfite is 0.42%;

[0026] Then, the above mixed solution is stirred evenly, and the hydrogel is formed by standing for a polymerization reaction. The polymerization temperature of the polymerization reaction is 25° C. and the polymerization time is 2 hours. The obtained hydrogel is chopped and freeze-dried to obtain polyacrylic acid water. The gel adsorption material was ...

Embodiment 2

[0029] A preparation method of a polyacrylic acid hydrogel adsorption material is as follows: respectively preparing an acrylic acid solution, an ammonium persulfate solution and a sodium hydrogen sulfite solution, and dissolving N,N'-methylenebisacrylamide in the acrylic acid solution, Then add ammonium persulfate solution and sodium bisulfite solution, add water to dilute to obtain a mixed solution, in the mixed solution, the mass fraction of acrylic acid is 28%, and the mass fraction of N,N'-methylenebisacrylamide is 1.2% , the mass fraction of ammonium persulfate is 0.35%, and the mass fraction of sodium bisulfite is 0.35%;

[0030] Then, the above mixed solution was stirred evenly, and the hydrogel was formed by standing for polymerization reaction. The polymerization temperature of the polymerization reaction was 23° C., and the polymerization time was 2.5 h. The obtained hydrogel was chopped and freeze-dried to obtain polyacrylic acid. The hydrogel adsorption material w...

Embodiment 3

[0033] A method for preparing a polyacrylic acid adsorption material is as follows: respectively preparing an acrylic acid solution, an ammonium persulfate solution and a sodium hydrogen sulfite solution, dissolving N,N'-methylenebisacrylamide in the acrylic acid solution, and then adding a Ammonium sulfate solution and sodium bisulfite solution are diluted with water to obtain a mixed solution. In the mixed solution, the mass fraction of acrylic acid is 32%, the mass fraction of N,N'-methylenebisacrylamide is 0.8%, and the mass fraction of persulfuric acid is 0.8%. The mass fraction of ammonium is 0.45%, and the mass fraction of sodium bisulfite is 0.45%;

[0034] Then, the above mixed solution is stirred evenly, and a hydrogel is formed by standing for a polymerization reaction. The polymerization temperature of the polymerization reaction is 27° C., and the polymerization time is 2-2.5 h. The obtained hydrogel is chopped and freeze-dried to obtain Polyacrylic acid hydrogel ...

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Abstract

The invention discloses a preparation method and application of a polyacrylic acid hydrogel adsorbing material. The polyacrylic acid hydrogel adsorbing material is characterized in that crylic acid serves as a monomer, N,N'-methylene bisacrylamide serves as a cross-linking agent, ammonium persulfate serves as an initiator, sodium hydrogen sulfite serves as a coagulant aid, and the polyacrylic acid hydrogel adsorbing material is formed by free radical polymerization. By means of the preparation method and application, the synthetic method is simple and convenient, the requirement for the reaction condition is low, the price of raw materials is low, and utilization and popularization are facilitated; synthesis and adsorbing operation steps are simple and convenient; the polyacrylic acid hydrogel adsorbing material can effectively absorb heavy metal ions such as uranium and copper so as to achieve the aim of reasonably treating waste water; and the optimal adsorption conditions can be obtained by adjusting the different initial concentration, the optimal PH and the absorbing balance time.

Description

technical field [0001] The invention relates to the field of biochemical industry, in particular to a preparation method and application of a polyacrylic acid hydrogel adsorption material Background technique [0002] Adsorption has been widely used in water treatment, especially the removal of heavy metal ions and organic dyes. Among all adsorption materials, polymer hydrogels have a large number of active groups (heavy metal ion chelation active sites point) and has been widely used. Most of the adsorption materials have low adsorption performance, poor mechanical strength and are difficult to recycle. Polyacrylic acid hydrogels occupy an important position due to the large number of carboxyl groups, good chemical stability and strong solvent resistance. [0003] The traditional polyacrylic acid hydrogel synthesis method needs to be carried out under nitrogen protection, the polymerization time is long, and the cost is high, which is not conducive to popularization and ap...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F222/38B01J20/26B01J20/30C02F1/28C02F101/20
CPCC08F220/06B01J20/261C02F1/285C02F2101/20C08F222/385
Inventor 许小平伊晓峰欧敏锐祝令辉谷俊杰
Owner FUZHOU UNIVERSITY
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