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A preparation method of porous polymer microspheres with heavy metal chelating function

A technology of polymer microspheres and heavy metals, which is applied in the directions of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc. Efficiency and other issues, to achieve the effect of easy removal, large specific surface area, and efficient adsorption and removal of heavy metals

Active Publication Date: 2020-09-08
沐联环境科技(重庆)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heavy metal pollution involves a large area and is difficult to control and treat
[0003] At present, the chemical adsorption method is the main technical means for the treatment and control of heavy metal pollution. It has the advantages of low cost and high adsorption and removal efficiency. There are few heavy metal adsorption sites and small specific surface area defects in the agent, resulting in unsatisfactory adsorption capacity and adsorption efficiency.

Method used

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  • A preparation method of porous polymer microspheres with heavy metal chelating function

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preparation example Construction

[0024] Such as figure 1 As shown, the preparation method of porous polymer microspheres with heavy metal chelating function provided by the embodiments of the present invention includes the following steps:

[0025] S101: Glycidyl methacrylate monomer, function adjustment monomer, crosslinking monomer, initiator, foaming agent, by molar ratio 10-100:5-50:0.5-20:0.1-10:0.5- 20, mix evenly, add to the aqueous solution containing 1-10%wt.% dispersant, stir, heat up to 20°C-80°C, keep warm and stir for 2h-24h, cool down, filter, wash with water, freeze-dry, and prepare the porous high molecular microspheres;

[0026] S102: redispersing and suspending the prepared porous polymer microspheres in an aqueous solution, adding functional modification monomers to prepare polymer porous microspheres with a heavy metal chelating function;

[0027] S103: Soak the base material in the polymer porous microsphere dispersion liquid with heavy metal chelating function, and carry out the bondin...

Embodiment 1

[0039] The preparation and application of the porous polymer microspheres with heavy metal chelating function provided by the embodiment of the present invention comprises the following steps:

[0040] (1) In 100ml of water, add 5ml of Tween 80, keep the temperature at 80°C, add 20g of glycidyl methacrylate, 5g of methyl acrylate, 0.5g of pentaerythritol triacrylate, 4g of benzoyl peroxide, and 10ml of petroleum ether under stirring , react at 80°C for 6 hours, filter, wash with water, and freeze-dry to obtain porous polymer microspheres;

[0041] (2) Place the porous polymer microspheres prepared in step (1) in 20wt.% ethylenediamine solution, soak for 24 hours with shaking at 20°C, filter, wash with water, and freeze-dry to obtain the porous polymer with heavy metal chelating function Microspheres.

[0042](3) the brass mesh is placed in the water-ethanol mixed solution (water / ethanol is 1:1) of the porous polymer microspheres with heavy metal chelating function prepared in...

Embodiment 2

[0044] The preparation and application of the porous polymer microspheres with heavy metal chelating function provided by the embodiment of the present invention comprises the following steps:

[0045] (1) In 100ml of water, add 8ml of sorbitan monostearate, at a constant temperature of 75°C, add 30g of glycidyl methacrylate, 5g of methacrylic acid, 1g of polyethylene glycol diacrylate, 2g of supernatant Benzoyl oxide and 20ml of n-heptane were reacted at 75°C for 10 hours, filtered, washed with water, and freeze-dried to obtain porous polymer microspheres;

[0046] (2) Place the porous polymer microspheres prepared in step (1) in a 5wt.% thioglycolic acid solution, shake and soak at 30°C for 12 hours, filter, wash with water, and freeze-dry to obtain a porous polymer with heavy metal chelating function Microspheres.

[0047] (3) Sisal fibers are placed in the water-ethanol mixed solution (water / ethanol is 1:1) of the porous polymer microspheres with heavy metal chelating fun...

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Abstract

The invention belongs to the technical field of heavy metal environmental governance, and discloses a method for preparing a porous polymer microsphere with a heavy metal chelating function, porous poly glycidyl methacrylate polymer microspheres are prepared by free radical emulsion polymerization, and heavy metal chelating functional groups are used for modification of the surface of the microspheres and the surface of holes for establishment of heavy metal chelating adsorption channels to prepare the porous polymer microsphere with the heavy metal chelating function. The porous polymer microsphere with the heavy metal chelating function has the advantages of large specific surface area, many heavy metal chelating sites, and high efficiency, stability and durability of adsorption and removal of heavy metals, and can be conveniently bonded to the surface of a substrate.

Description

technical field [0001] The invention belongs to the technical field of heavy metal environmental treatment, and in particular relates to a method for preparing porous polymer microspheres with a heavy metal chelating function. Background technique [0002] With the rapid development of the economy, especially the human activities in mining, metallurgy, chemical industry and other industries, the problem of heavy metal pollution is becoming more and more serious. Heavy metal pollution problems include heavy metal soil pollution, heavy metal air pollution, and heavy metal water pollution. Heavy metals (mainly mercury (Hg), cadmium (Cd), lead (Pb), chromium (cr), arsenic (As), copper (Cu), zinc (Zn), cobalt (Co), nickel (Ni), etc.) It exists in the environment in different forms, accumulates, migrates, and binds to biological enzymes after entering the human body to inhibit protein synthesis, induce protein denaturation, and interfere with the nervous system. Excessive enrichm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/265B01J20/28016B01J20/28054C02F1/285C02F2101/20
Inventor 窦建军陈刚才肖定书叶姜瑜
Owner 沐联环境科技(重庆)股份有限公司
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