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Preparation method of a core-shell magnetic surface imprinted nanocomposite material

A nanocomposite material and 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: 2016-04-06
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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  • Preparation method of a core-shell magnetic surface imprinted nanocomposite material
  • Preparation method of a core-shell magnetic surface imprinted nanocomposite material
  • Preparation method of a core-shell magnetic surface imprinted nanocomposite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Synthesis of ferric oxide nanospheres

[0027] Ferric chloride hexahydrate (FeCl 3 ·6H 2 (0), wherein the volume and mass ratio of ethylene glycol to ferric chloride hexahydrate is medium 40:1.0 (ml / g), vigorously stirred for 30min until a uniform solution is formed; in the above solution, add anhydrous sodium acetate (NaAc ) and polyethylene glycol (PEG-6000), wherein the mass ratio of anhydrous sodium acetate to polyethylene glycol is 3.0:0.5 (mg / mg) and stirred vigorously until completely dissolved, then moved into a stainless steel reaction kettle, at 150 o C under reaction 6.0h, after the reaction is completed, cool to room temperature, separate with rd-Fe-B permanent magnet, wash the product multiple times with absolute ethanol and deionized water, at 50 o C under vacuum drying, to obtain black magnetic ferric oxide nanospheres (Fe 3 o 4 ).

[0028] (2) Surface modification of Fe3O4 nanospheres

[0029] Add toluene, ferric oxide nanospheres and 3-(methac...

Embodiment 2

[0033] (1) Synthesis of ferric oxide nanospheres

[0034] Ferric chloride hexahydrate (FeCl 3 ·6H 2 (0), wherein the volume and mass ratio of ethylene glycol to ferric chloride hexahydrate is medium 40:1.5 (ml / g), vigorously stirred for 30min until a uniform solution is formed; in the above 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 12h, after the completion of the reaction, cool to room temperature, separate with rd-Fe-B permanent magnet, wash the product multiple times with dehydrated ethanol and deionized water, at 60 o C under vacuum drying, to obtain black magnetic ferric oxide nanospheres (Fe 3 o 4 ).

[0035] (2) Surface modification of Fe3O4 nanospheres

[0036] Add toluene, ferric oxide nanospheres and 3-(met...

experiment example 1

[0043] Experimental Example 1: Take 10ml 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 of MMIPs and MNIPs respectively, and put the test solution in a 298K water bath to statically After standing for 12.0 hours, 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 according to 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 invention relates to a preparation method of a core-shell magnetic surface imprinted nanocomposite material, which belongs to the technical field of preparation of environmental functional materials. Firstly, monodisperse magnetic Fe3O4 nanospheres were synthesized by solvothermal method; secondly, the surface was modified with vinyl functionalization using 3-(methacryloyloxy)propyltrimethoxysilane; finally, the surface was modified with acetonitrile as a solvent, tetracycline as a template molecule, methacrylic acid as a functional monomer, ethylene glycol dimethacrylate as a crosslinking agent, azobisisobutyronitrile as an initiator monomer, and vinyl-modified ferric iron tetroxide Imprinting polymerization occurs on the surface of nanospheres, template molecules are extracted by Soxhlet, and core-shell magnetic surface imprinted nanocomposites are obtained. Through a variety of characterization methods, the parameters such as the morphology and particle size distribution of the polymer are revealed. The selective removal performance of tetracycline in water environment by the obtained material was studied by adsorption experiment.

Description

technical field [0001] The invention relates to a preparation method of a core-shell magnetic surface imprinted nanocomposite material, which belongs to the technical field of preparation of environmental functional materials. Background technique [0002] Tetracycline antibiotics have good antibacterial activity against serious diseases caused by Gram-positive and Gram-negative, so they are widely used in human and animal disease prevention and treatment or as poultry feed additives. However, tetracycline is poorly digested and absorbed in the body, so most of it does not participate in metabolism and is excreted from the body. It still maintains biological activity, enters the environment, transfers and spreads among microorganisms, and produces toxic effects. The abuse of tetracycline has led to unsafe residues in meat agricultural products and the ecological environment. Scholars at home and abroad have confirmed the presence of tetracycline antibiotic residues in soil ...

Claims

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Application Information

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Patent Type & Authority Patents(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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