Preparation method of copolymer, and copolymer prepared by same and application thereof in water treatment

A technology of copolymers and monomers, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of high molecular polymer purity decline, and achieve effective adsorption and low production cost Low, high adsorption capacity effect

Inactive Publication Date: 2011-10-05
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above method is a chemical polymerization method, and its preparation process often requires the addition of initiators and crosslinking agents, resulting in a decrease in the purity of the prepared polymer.

Method used

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  • Preparation method of copolymer, and copolymer prepared by same and application thereof in water treatment
  • Preparation method of copolymer, and copolymer prepared by same and application thereof in water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The monomer mixture ratio: the volume ratio of NVF to HEA is 1:3, and the ratio of water to the total volume of NVF and HEA is 7:3;

[0028] Radiation polymerization process: at -78℃, adopt 60 Co-γ high-energy rays, control the radiation dose to 1×10 5 Gy.

[0029] Use scanning electron microscopy to analyze the product, such as figure 1 As shown, it can be seen from the figure that the product has a better pore structure. The same results can be obtained with the electron beam radiation produced by the electron linear accelerator.

Embodiment 2

[0031] Monomer mixture ratio: the volume ratio of NVF to HEA is 2:5, and the ratio of water to the total volume of NVF and HEA is 6:1; radiation polymerization process: at -78℃, using 137 Cs-γ high-energy rays, control the radiation dose to 1×10 4 Gy. Copolymer dry product on Cr 3+ , Cd 2+ , Cu 2+ , Co 2+ The adsorption capacities of the four metal ions are: 212mg / g, 153mg / g, 101mg / g, 75mg / g.

Embodiment 3

[0033] The monomer mixture ratio: the volume ratio of NVF to HEA is 1:9, and the ratio of water to the total volume of NVF and HEA is 3:2;

[0034] Radiation polymerization process: at -95℃, adopt 60 Co-γ high-energy rays, control the radiation dose to 1×10 3 Gy.

[0035] Copolymer dry product on Cr 3+ , Cd 2+ , Cu 2+ , Co 2+ The adsorption capacities of the four metal ions are: 200mg / g, 156mg / g, 86mg / g, 68mg / g.

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Abstract

The invention relates to a preparation method of a copolymer, which comprises the following steps: evenly mixing N-vinylformamide monomer, 2-hydroxyethyl acrylate monomer and water, wherein the volume ratio of N-vinylformamide monomer to 2-hydroxyethyl acrylate monomer is 1:1-1:9; and charging a protective gas, and carrying out high-energy ray irradiation polymerization at -63--95 DEG C. The invention also relates to a copolymer prepared by the preparation method; and the copolymer has a good pore structure, contains a functional group capable of adsorbing heavy metal ions, has high adsorption capacity for Cr<3+>, Cd<2+>, Cu<2+> and Co<2+>, and has a certain mechanical strength and long service life. In addition, the preparation method provided by the invention does not need to add any initiator or crosslinking agent, thereby ensuring the purity of the copolymer; and the preparation method is simple and easy to operate, and has the advantage of lower production cost.

Description

Technical field [0001] The invention belongs to the technical field of adsorbent materials, and relates to the preparation of adsorbent materials and their adsorption performance for heavy metals, in particular to a preparation method of a copolymer, a copolymer obtained by the preparation method and its application in water treatment . Background technique [0002] With the development of industry and the progress of society, the discharge of pollutants has become more and more serious, resulting in frequent pollution of natural water bodies and soil that humans depend on. Heavy metals, as one of the pollutants, are extremely harmful to the ecological environment and humans due to their greater toxicity: they not only pose a threat to aquatic organisms, but can also accumulate to high toxicity through the food chain, ultimately endangering human health. For example, in Japan in the 1960s and 1970s, there were incidents of Minamata disease caused by mercury pollution and bone pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/28C08F220/54C08F2/46B01J20/26B01J20/30B01J20/28C02F1/28C02F1/62
Inventor 李正魁周涛吴宁梅赵琳
Owner NANJING UNIV
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