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Green preparation method of magnetic molecular imprinting sorbent

A magnetic molecular imprinting and adsorbent technology, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal oxides/hydroxides, etc., can solve the problems of complex components, teratogenicity, carcinogenicity, etc., and achieve high adsorption Effects of capacity, fast adsorption equilibrium, high-efficiency magnetic separation performance, and selective recognition performance

Inactive Publication Date: 2013-05-15
JIANGSU UNIV
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Problems solved by technology

Abuse of sulfamethazine in the environment and long-term enrichment residues in organisms can easily lead to high levels of drug resistance, which may cause carcinogenesis and teratogenicity in serious cases. Therefore, timely detection and effective separation of sulfamethazine in water environment has become It is extremely important, but the components in the water environment are complex, and it is particularly important to selectively identify and separate SAs

Method used

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  • Green preparation method of magnetic molecular imprinting sorbent
  • Green preparation method of magnetic molecular imprinting sorbent
  • Green preparation method of magnetic molecular imprinting sorbent

Examples

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experiment example 3

[0035] Experimental Example 3: Take 10ml of sulfamethazine solution with an initial concentration of 100 μmol / L and add it to the colorimetric tube, add 5.0mg of MMIPs and MNIPs adsorbent, and put the test solution in a water bath at 25°C for 10, 20, 30, 45, 60, 80, 90 and 100 minutes. After the standing time is completed, the supernatant is separated and collected by a Nd-Fe-B permanent magnet, and the concentration of unadsorbed sulfamethazine molecules is measured by an ultraviolet-visible spectrophotometer, and the adsorption capacity is calculated according to the results. Figure 7 It shows that the magnetic molecularly imprinted and non-imprinted adsorbents have good adsorption kinetics for sulfamethazine, and the adsorption equilibrium is basically reached within 1.0 h, and the adsorption rate is relatively fast.

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Abstract

The invention relates to a green preparation method of a magnetic molecular imprinting sorbent. The method is as below: preparing Fe3O4 nanoparticles by a room temperature ultrasonic-assisted coprecipitation method; conducting vinyl functionalization modification on the surfaces of the nanoparticles by using 3-(methacryloyloxy) propyl trimethoxy silane; and preparing the magnetic molecular imprinting sorbent in a methanol / water mixture system at room temperature through atomic transfer free radical precipitation polymerization by using sulfamethazine as a template molecule, hydroxyethyl methacrylate and 4-vinyl pyridine as functional monomers, ethylene glycol dimethacrylate and N, N'- methylene bisacrylamide as crosslinking agents, and cuprous bromide, N, N, N', N', N''- pentamethyldiethylenetriamine and 2-bromine ethyl isobutyrate as an initiator system. Static adsorption experiment results show that the magnetic molecular imprinting sorbent prepared by the invention has high adsorption capacity, rapid dynamic properties, specific molecular recognition properties and rapid magnetic separation capacity.

Description

technical field [0001] The invention relates to a green preparation method of a magnetic molecular imprinted adsorbent, which belongs to the technical field of preparation of environmental functional materials. Background technique [0002] Molecular imprinting technology (MIT) first interacts template molecules with selected functional monomers in a suitable solvent to form a complex, then forms a highly cross-linked polymer under the action of a cross-linking agent, and finally removes the template by specific means. After the molecular imprinting polymer is obtained, binding sites with specific recognition for the template molecule are left. Magnetic molecularly imprinted adsorbents (MMIPs) have dual functions of magnetic responsiveness and imprint recognition, and can rapidly separate the target substance from the mother liquor under the action of a magnetic field. Therefore, magnetic molecularly imprinted adsorbents have been widely used in various fields. [0003] Fre...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28
Inventor 戴江栋潘建明邹永立周志平闫永胜
Owner JIANGSU UNIV
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