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Copper ion imprinted polymer and application thereof

A technology of imprinting polymers and copper ions, which can be applied to alkali metal compounds, other chemical processes, alkali metal oxides/hydroxides, etc. Effects of Reaction Steps

Inactive Publication Date: 2012-09-12
SHANGHAI OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] 1,4-Dihydroxyanthraquinone is a functional monomer with affinity and specific selectivity for copper ions, because 1,4-dihydroxyanthraquinone cannot be cross-linked with ethylene glycol dimethacrylate In this method, 1,4-dihydroxyanthraquinone must first be connected with a double bond, and then cross-linked with a cross-linking agent. The steps are relatively cumbersome

Method used

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  • Copper ion imprinted polymer and application thereof
  • Copper ion imprinted polymer and application thereof
  • Copper ion imprinted polymer and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] (1) Get 1,4-dihydroxyanthraquinone 1mmol, add acetonitrile 60ml, add copper nitrate 1mmol (solid or copper ion concentration is 1mol / L solution), fully react 3h on the magnetic stirrer, this reaction is at room temperature (10 ~30°C); add EGDMA (ethylene glycol dimethacrylate) 20mmol, azobisisobutyronitrile (AIBN) 0.6mmol, under nitrogen protection, heat in an oil bath, and react at 60°C for 24h;

[0019] (2) Take the solid, that is, the polymer generated by the reaction in step (1), and wash it with aqueous methanol (the volume ratio of methanol to water is 1:4) to remove unreacted substances; then wash with 0.1mol / L nitric acid oscillation Remove copper ions, wash 3 to 4 times, each shaking washing time is 30 to 60 minutes, the amount of nitric acid solution is 25 to 200ml / time; wash with water to pH 7, dry at 60°C to obtain copper ion imprinted polymer .

Embodiment 2

[0021] Dissolve 1,4-dihydroxyanthraquinone in acetonitrile, keep the amount of anthraquinone constant, change the amount of copper ion, make copper ion and 1,4-dihydroxyanthraquinone according to the ratio of substance respectively 0, 0.2, 0.4, 0.6, 0.8, 1.0, 2.0, 2.6, 3.0 and 3.6 combined, and the absorbance of the solution can be detected to judge the combination of the template and the functional monomer.

[0022] The combination of template copper ion and functional monomer 1,4-dihydroxyanthraquinone in acetonitrile solution is as follows: figure 1 shown. When the molar ratio of substances is 0, there is only anthraquinone in the system, and the absorbance is the largest. When copper ions are added, anthraquinone and copper ions are combined and coordinated, which means that the concentration of anthraquinone in the system decreases, which affects the absorbance of anthraquinone. Therefore, as the amount of copper ions added increases, the maximum absorbance decreases gra...

Embodiment 3

[0024] (1) Take 1 mmol of 1,4-dihydroxyanthraquinone, add 50 ml of acetonitrile, add 1 mmol of copper nitrate (solid or saturated solution), and fully react on a magnetic stirrer for 4 hours. The reaction is carried out at room temperature (10-30 ° C) ; Add EGDMA (ethylene glycol dimethacrylate) 18mmol, azobisisobutyronitrile (AIBN) 0.7mmol, under the protection of nitrogen, heat with an oil bath, and react at 65°C for 20h;

[0025] (2) Take the solid, that is, the polymer generated by the reaction in step (1), and wash it with methanol aqueous solution (the volume ratio of methanol to water is 1:4) to remove unreacted substances; then use 0.2mol / L nitric acid vibration washing Remove copper ions, wash 3 to 4 times, each shaking washing time is 30 to 60 minutes, and the amount of nitric acid solution is 25 to 150ml / time; wash with water until the pH is 7, and dry at 60°C.

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Abstract

The invention belongs to the field of analysis and detection of metal ions in water environment, and discloses a copper ion imprinted polymer, which comprises a polymer carrier and a functional monomer 1,4 - dihydroxy anthraquinone embedded in the polymer carrier, wherein the polymer carrier uses ethylene glycol dimethacrylate as a monomer. The preparation method comprises the following steps of: (1) mixing the 1,4 - dihydroxy anthraquinone with an organic solvent and a soluble copper salt, adding a crosslinking agent and an initiator agent, and reacting for 18 to 20hr at a temperature of 50 to 65 DEG C in the absence of oxygen; and (2) after washing, adding nitric acid to remove the copper ions. By a way that the functional monomer is embedded in a polymer network and a precipitation polymerization method, the imprinted polymer with selective adsorption for the copper ions is synthesized. The ion imprinted polymer has a specific recognition capability for the copper ions, and has better selectivity. Without connecting a double bond capable of being reacted with the crosslinking agent with the 1,4-dihydroxy anthraquinone in advance, the selection type and scope of the functional monomer is expanded, and the reaction steps are simplified.

Description

technical field [0001] The invention belongs to the field of analysis and detection of metal ions in water environment, and relates to polymers, in particular to imprinted polymers with specific recognition performance for copper ions. Background technique [0002] Copper is a non-ferrous metal that is very closely related to human beings. The content of trace element copper in the human body is 100-150mg. When the copper content is too much, it will accumulate in the liver and cause harm to the liver. In recent years, the discharge of a large amount of copper-containing wastewater has caused the content of copper ions in some rivers and reservoirs to exceed the standard, which seriously threatens human health and the living environment of aquatic organisms. Due to the impact of copper on organisms and the environment, the current determination of copper ions in water mainly includes colorimetric spectrophotometry and modified electrode methods, but these methods are mostly...

Claims

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Application Information

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IPC IPC(8): C08F122/14C08F2/44C08J9/28B01J20/26B01J20/28B01J20/30
Inventor 康永锋李艳段吴平康俊霞史华进
Owner SHANGHAI OCEAN UNIV
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