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Palladium ion imprinted polymer and preparation method and application thereof

A technology of imprinting polymer and palladium ions, which is applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve the problem of less research on the preparation of palladium ion-imprinted polymers, lack of isothermal adsorption properties, and heavy metal selective adsorption research, etc. problem, to achieve the effect of low production cost, good environmental performance and simple regeneration method

Inactive Publication Date: 2018-09-21
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are relatively few studies on the preparation of palladium ion-imprinted polymers, and there is also a lack of research on its isothermal adsorption properties and selectivity for various heavy metals.

Method used

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  • Palladium ion imprinted polymer and preparation method and application thereof
  • Palladium ion imprinted polymer and preparation method and application thereof
  • Palladium ion imprinted polymer and preparation method and application thereof

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preparation example Construction

[0031] Specifically, for a preparation method of a palladium ion-imprinted polymer of the present invention, please refer to Figure 1-Figure 2 , including the following steps:

[0032] Step A, the template palladium ion PdCl 4 2- 1. Functional monomers are mixed and dissolved in methanol, placed in a constant temperature oscillator to oscillate and react to form a template functional monomer complex, and then add an initiator and a crosslinking agent and mix evenly; wherein, the functional monomer is 4-ethylene ylpyridine, 2-allylthionicotinic acid or 2-acetamidoacrylic acid, the initiator is azobisisobutyronitrile, and the crosslinking agent is ethylene glycol dimethacrylate.

[0033] In step B, inject nitrogen into the homogeneously mixed solution obtained in step A, quickly seal it, and under the protection of nitrogen, adopt the precipitation polymerization method and place it in a constant temperature water bath for polymerization to obtain an ion-imprinted polymer wit...

Embodiment 1

[0043] Weigh 32.64mg K 2 PdCl 4 , placed in a centrifuge tube filled with 20mL of methanol, 42.06mg of 4-vinylpyridine was added to it, and placed in a constant temperature oscillator (180rpm, 25°C) for oscillating reaction for 3h, and the palladium ion PdCl 4 2- After fully reacting with the functional monomer, add 75.3mL crosslinking agent ethylene glycol dimethacrylate EGDMA and 36.13mg initiator azobisisobutyronitrile AIBN (the amount is the molar weight of functional monomer and crosslinking agent 5% of the sum). After fully mixing, transfer it into a thick-walled pressure-resistant bottle, pass nitrogen gas for 10 minutes, seal the bottle quickly under the protection of nitrogen gas, and then shake and react in a constant temperature water bath at 60°C at a shaking rate of 180rpm for 24 hours. Dry, water should be added at regular intervals. After thermal polymerization, the polymer synthesized in the thick-walled pressure-resistant bottle was transferred to a large-...

Embodiment 2

[0046] Weigh 32.64mg K 2 PdCl 4 , placed in a centrifuge tube filled with 20mL of methanol, 78.10mg of 2-allylthionicotinic acid ANA was added to it, and placed in a constant temperature oscillator (180rpm, 25°C) for oscillating reaction for 3h, and the palladium ion PdCl 4 2- After fully reacting with the functional monomer, add 75.3mL crosslinking agent ethylene glycol dimethacrylate EGDMA and 36.13mg initiator azobisisobutyronitrile AIBN (the amount is the molar weight of functional monomer and crosslinking agent 5% of the sum). After fully mixing, transfer it into a thick-walled pressure-resistant bottle, pass nitrogen gas for 10 minutes, seal the bottle quickly under the protection of nitrogen gas, and then shake and react in a constant temperature water bath at 60°C at a shaking rate of 180rpm for 24 hours. Dry, water should be added at regular intervals. After thermal polymerization, the polymer synthesized in the thick-walled pressure-resistant bottle was transferr...

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Abstract

The invention provides a palladium ion imprinted polymer and a preparation method and application thereof. The method comprises the steps that template palladium ion PdC142- and functional monomers are mixed and dissolved in methyl alcohol, and placed in a thermostatic oscillator for oscillatory reaction to form a template functional monomer complex, and initiator and a cross-linking agent are added and mixed evenly; nitrogen is introduced in the obtained evenly-mixed solution, and a precipitation polymerization method is adopted to obtain the ion imprinted polymer with template ions; the initiator, the cross-linking agent and the unreacted functional monomers are removed; centrifugal treatment is carried out on an obtained sample, supernate is discarded, the obtained polymer is placed ina vacuum drying oven and dried, and the palladium ion imprinted polymer is obtained. The provided palladium ion imprinted polymer has high affinity and significant selectivity for heavy metal palladium, and can effectively separate and recycle the heavy metal contaminated water body containing palladium.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a palladium ion imprinted polymer, a preparation method thereof and an application for adsorption of heavy metal palladium in water bodies. Background technique [0002] Heavy metal pollution is one of the most harmful water pollution problems. With the development of cities, palladium (Pd) is widely used in electroplating materials, catalysts, dental alloys, brazing alloys, etc. due to its unique physical and chemical properties, especially its catalytic performance. With the continuous expansion of the application range of palladium in various fields, its concentration in the environment continues to increase, and the discharge of palladium-containing waste liquid into the environment will cause great harm to the environment and human health; and palladium, as a precious metal, itself It has the value of recycling, and random rowing will also cause serious waste of res...

Claims

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Application Information

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IPC IPC(8): C08F222/14C08F226/06C08F228/04C08F226/02C08J9/26B01J20/26B01J20/30C02F1/28C02F101/20
CPCB01J20/268C02F1/285C02F2101/20C08F222/1006C08F222/102C08F226/06C08F228/04C08F226/02
Inventor 陶虎春谷翼涵张丽娟朱丽丽刘威
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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