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Core-shell type magnetic surface imprinting nanometer composite material preparation method

A nanocomposite material, surface imprinting technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problems of uniform coating and thickness control of difficult-to-polymerize layers, and achieve excellent regeneration performance effect

Inactive Publication Date: 2014-02-26
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current commonly used surface imprinting technology still has many technical difficulties: for example, it is difficult to achieve uniform coating of the polymer layer and control the thickness at the nanometer level, etc.

Method used

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  • Core-shell type magnetic surface imprinting nanometer composite material preparation method
  • Core-shell type magnetic surface imprinting nanometer composite material preparation method
  • Core-shell type magnetic surface imprinting nanometer composite material preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Synthesis of Fe3O4 nanospheres

[0028] Ferric chloride hexahydrate (FeCl 3 ·6H 2 (2), wherein the volume and mass ratio of ethylene glycol and ferric chloride hexahydrate is middle 40: 1.0 (ml / g), vigorously stirred 30 min until forming uniform solution; In above-mentioned solution, add anhydrous sodium acetate ( NaAc) and polyethylene glycol (PEG-6000), wherein the mass ratio of anhydrous sodium acetate and polyethylene glycol is 3.0:0.5 (mg / mg) Stir vigorously until completely dissolved, then move into a stainless steel reactor, at 150 o C under reaction for 6.0 h, after the completion of the reaction, cool to room temperature, separate with rd-Fe-B permanent magnet, wash the product several times with absolute ethanol and deionized water, o C under vacuum drying, to obtain black magnetic ferric oxide nanospheres (Fe 3 o 4 ).

[0029] (2) Surface modification of Fe3O4 nanospheres

[0030] Add toluene, ferric oxide nanospheres and 3-(methacryloyloxy)prop...

Embodiment 2

[0034] (1) Synthesis of Fe3O4 nanospheres

[0035] Ferric chloride hexahydrate (FeCl 3 ·6H 2 (2), wherein the volume and mass ratio of ethylene glycol and ferric chloride hexahydrate is middle 40: 1.5 (ml / g), vigorously stirred 30 min until forming uniform solution; In above-mentioned solution, add anhydrous sodium acetate ( NaAc) and polyethylene glycol (PEG-6000), wherein the mass ratio of anhydrous sodium acetate and polyethylene glycol is 4.0:1.5 and stirred vigorously until completely dissolved, then moved into a stainless steel reaction kettle, at 220 o C under reaction for 12 h, after the completion of the reaction, cooled to room temperature, separated with rd-Fe-B permanent magnet, and washed the product with absolute ethanol and deionized water several times, at 60 o C under vacuum drying, to obtain black magnetic ferric oxide nanospheres (Fe 3 o 4 ).

[0036] (2) Surface modification of Fe3O4 nanospheres

[0037] Add toluene, ferric oxide nanospheres and 3...

experiment example 1

[0044] Experimental Example 1: Take 10 ml of tetracycline solutions with initial concentrations of 10, 30, 50, 80, 100, 150, and 200 μmol / L, respectively, and add them to centrifuge tubes, add 5.0 mg MMIPs and MNIPs respectively, and place the test solution at 298 After standing in a K water bath for 12.0 h, the supernatant was collected by magnetic separation, and the concentration of unadsorbed tetracycline molecules was measured with an ultraviolet-visible spectrophotometer, and the adsorption capacity was calculated based on the results. Figure 7 The results showed that with the increase of temperature and concentration, the adsorption capacity increased gradually, and finally reached the adsorption equilibrium, and the adsorption capacity of MMIPs to tetracycline was always greater than that of MNIPs, which proved that there were a large number of imprinted pores.

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Abstract

The present invention relates to a core-shell type magnetic surface imprinting nanometer composite material preparation method, and belongs to the technical field of environmental function material preparation. The preparation method comprises: adopting a solvothermal method to synthesize monodispersed magnetic iron oxide nano-spheres; adopting 3-(methacryloxy)propyl trimethoxyl silane to carry out vinyl functionalization modification on the surface; and adopting acetonitrile as a solvent, adopting tetracycline as template molecule, adopting methacrylic acid as a functional monomer, adopting ethylene glycol dimethacrylate as a cross-linking agent, adopting azobisisobutyronitrile as an initiator monomer, carrying out imprinting polymerization on the surface of the vinyl-modified iron oxide nano-spheres, and carrying out soxhlet extraction of the template molecule to obtain the core-shell type magnetic surface imprinting nanometer composite material. According to the present invention, with multiple characterization methods, morphology, particle size distribution and other parameters of the polymer are revealed; and the material obtained by using the absorption experiment research is adopted to selectively remove tetracycline in the water environment.

Description

Technical field [0001] The present invention involves a nuclear -shell magnetic surface -to -surface printing method of nano -composite materials, which is a technical field of environmental functional materials preparation. Background technique [0002] Tetracycline antibiotics have good antibacterial activity for serious diseases in Gram -positive and under negatives of Gram. Therefore, it is widely used in human and animals' disease prevention and treatment or as poultry feed additives.However, tetracycline has poor digestion and absorption in the body. Therefore, most of them have not participated in metabolism and eliminated in vitro. They still maintain biological activity. They enter the environment and transmit and spread in microorganisms.The abuse of tetracycline has led to unsafe residues in meat agricultural products and ecological environments.Studies at home and abroad have confirmed the existence of tetracycline antibiotic residues in the soil and water environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/14C08F220/06C08K9/06C08K3/22C08J9/26B01J20/26B01J20/28
Inventor 戴江栋赵春艳周志平邹永立邹天边闫永胜
Owner JIANGSU UNIV
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