Method for preparing magnetic magnesium oxide surface molecular imprinting solid phase extractant

A technology of surface molecular imprinting and solid phase extraction agent, which is applied in the direction of chemical instruments and methods, and other chemical processes, to achieve the effect of improving binding efficiency, enhancing adsorption performance, and good specific adsorption

Inactive Publication Date: 2013-08-21
ZHENJIANG GAOPENG PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The study of immobilizing magnetic metal oxide nanoparticles on the surface of inorganic materials or covering the periphery of inorganic materials with polymer materials to prepare magnetic composite materials, and then imprinting and modifying the surface of magnetic composite materials to obtain magnetically imprinted polymeric adsorbents has not been reported yet.

Method used

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  • Method for preparing magnetic magnesium oxide surface molecular imprinting solid phase extractant
  • Method for preparing magnetic magnesium oxide surface molecular imprinting solid phase extractant
  • Method for preparing magnetic magnesium oxide surface molecular imprinting solid phase extractant

Examples

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Effect test

Embodiment 1

[0022] Example 1: (1) Preparation of magnetic magnesium oxide: Add 2.36 g of ferric chloride, 1.0 g of magnesium oxide and 50 mL of distilled water into a 250 mL flask, then ultrasonicate for 30 minutes, and stir at room temperature for 3 hours to obtain a stable suspension liquid; then add 0.86g of ferrous chloride to deoxygenate with nitrogen gas and continue to stir for 30 minutes at a speed of 800rmp, and heat up to 80 o After C, add 5.0mL 25% ammonia water dropwise, and continue to react for 1 hour to obtain a black product; o C vacuum dried.

[0023] (2) Preparation of cyclodextrin-modified magnetic magnesium oxide: Dissolve 1.19g cyclodextrin in 50mL N,N-dimethylformamide and then add 0.25g NaH, and stir the mixture at room temperature at 300rpm until no Gas generation; after filtering to remove excess sodium hydride, transfer the filtrate to a 250mL flask, add 1.0g KH-560, pass nitrogen to remove oxygen for 10min, and heat up to 90 o C for 5 hours; then add 1.25g of ...

Embodiment 2

[0025] Example 2: (1) Preparation of magnetic magnesium oxide: Add 4.72 g of ferric chloride, 2.0 g of magnesium oxide and 180 mL of distilled water into a 250 mL flask, then ultrasonicate for 30 minutes, and stir at room temperature for 3 hours to obtain a stable suspension liquid; then add 1.72g of ferrous chloride and continue to stir for 30 minutes at a speed of 800rmp after adding 1.72g of ferrous chloride to deoxygenate with nitrogen, and then heat up to 80 o Add 10mL 25% ammoniacal liquor dropwise after C, obtain black product after continuing to react for 1 hour; Product is washed with distilled water to neutral back 60 o C vacuum dried.

[0026] (2) Preparation of cyclodextrin-modified magnetic magnesium oxide: Dissolve 2.29g cyclodextrin in 100mL N,N-dimethylformamide and then add 0.5g NaH, and stir the mixture at room temperature at 300rpm until no Gas generation; filter to remove excess sodium hydride, transfer the filtrate to a 250mL flask, add 2.0g KH-560, pass ...

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Abstract

The invention relates to a method for preparing a magnetic magnesium oxide surface molecular imprinting solid phase extractant, which belongs to the technical field of environmental material preparation. The method comprises the following steps: preparing a magnetic magnesium oxide composite material by a coprecipitation method; then performing surface modification on the magnetic magnesium oxidecomposite material by cyclodextrin through a microemulsion method; finally preparing the surface molecular imprinting solid phase extractant based on the magnetic magnesium oxide composite material by suspension polymerization. A static state adsorption experiment is used for researching the adsorption balance, dynamics and selective recognition performance of the prepared imprinting adsorbent. The result shows that the magnetic magnesium oxide surface molecular imprinting solid phase extractant has high adsorption capacity, rapid absorption dynamic property and obvious thymol molecule recognition performance.

Description

technical field [0001] The invention relates to a method for preparing a magnetic magnesium oxide solid-phase extraction agent by using surface molecular imprinting technology, which belongs to the technical field of environmental material preparation. Background technique [0002] Thymol is widely used in the production process of food additives, cosmetic flavors, pharmaceutical intermediates and deodorants, but its excessive use will cause serious harm to the environment and human beings. Studies have shown that thymol can cause serious harm to the production of human cell plasma membrane and adenosine triphosphate. Therefore, reasonable treatment of thymol in environmental water samples is an important link. At present, solid phase extraction technology has been widely used in the research of wastewater treatment in the environment. [0003] Molecularly imprinted polymers have been widely used in chromatographic separation, biosensors and other fields as a new type of s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30
Inventor 邹晓华潘建明闫永胜管炜王雪李春香徐龙城
Owner ZHENJIANG GAOPENG PHARMA
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