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Preparation method of yeast microsphere magnetic composite material surface imprinted adsorbent

A magnetic composite material, surface imprinting technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., to achieve strong compatibility, reduce non-specific adsorption, and remove completely.

Inactive Publication Date: 2015-07-15
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on the preparation of magnetic composite materials by wrapping superparamagnetic metal oxide MO nanoparticles on the surface of organic materials by co-precipitation method, and then imprinting and modifying the surface of magnetic composite materials to obtain magnetically imprinted polymeric adsorbents.

Method used

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  • Preparation method of yeast microsphere magnetic composite material surface imprinted adsorbent
  • Preparation method of yeast microsphere magnetic composite material surface imprinted adsorbent
  • Preparation method of yeast microsphere magnetic composite material surface imprinted adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Taking the preparation of beta-cypermethrin as an example of yeast microsphere magnetic composite material surface imprinted adsorbent as a template molecule, the preparation method comprises the following steps:

[0033] Step 1: Preparation of Yeast Microsphere Magnetic Composite

[0034] Step 1.1: Weigh 10 g of yeast microspheres and disperse them in 350 mL of distilled water to form a yeast solution with a solid-to-liquid ratio of 1:35 g / mL; add 14 g of ferric chloride to the yeast solution, and stir mechanically at room temperature for 3 hours. Ventilate nitrogen to evacuate oxygen, add 10g ferrous chloride, make the mass ratio of yeast microspheres to ferric chloride and ferrous chloride 1:1.4:1, stir mechanically for 60 minutes until the temperature rises to 78°C, continue Stir mechanically and react for 25 minutes to prepare a yeast ferric chloride ferrous chloride dispersion solution.

[0035]1.2) Add 16g of sodium hydroxide to the dispersion solution in step 1...

Embodiment 2

[0043] Taking the preparation of beta-cypermethrin as an example of yeast microsphere magnetic composite material surface imprinted adsorbent as a template molecule, the preparation method comprises the following steps:

[0044] Step 1: Preparation of Yeast Microsphere Magnetic Composite

[0045] Step 1.1: Weigh 10 g of yeast microspheres and disperse them in 300 mL of distilled water to form a yeast solution with a solid-to-liquid ratio of 1:30 g / mL; add 12 g of ferric chloride to the yeast solution, and stir mechanically at room temperature for 3 hours. Negative nitrogen is evacuated oxygen, adds 9.5g ferrous chloride, makes the mass ratio of yeast microsphere and ferric chloride, ferrous chloride be 1:1.2:0.95, other operation is identical with embodiment 1 in this step, Prepare yeast ferric chloride ferrous chloride dispersion solution.

[0046] Step 1.2: Add 14g of sodium hydroxide to the dispersion solution in step 1.1), the mass ratio of yeast microspheres to sodium hy...

Embodiment 3

[0054] Taking the preparation of beta-cypermethrin as an example of yeast microsphere magnetic composite material surface imprinted adsorbent as a template molecule, the preparation method comprises the following steps:

[0055] Step 1: Preparation of Yeast Microsphere Magnetic Composite

[0056] Step 1.1: Weigh 10 g of yeast microspheres and disperse them in 500 mL of distilled water to form a yeast solution with a solid-to-liquid ratio of 1:50 g / mL; add 15 g of ferric chloride to the yeast solution, and stir mechanically at room temperature for 3 hours. Nitrogen evacuates oxygen, adds 11g ferrous chloride, makes the mass ratio of saccharomycete microsphere and ferric chloride, ferrous chloride be 1:1.5:1.1, other operations in this step are identical with embodiment 1, prepare into yeast ferric chloride ferrous chloride dispersion solution.

[0057] Step 1.2: Add 18g of sodium hydroxide to the dispersion solution in step 1.1), the mass ratio of yeast microspheres to sodium ...

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Abstract

The invention relates to a preparation method of a yeast microsphere magnetic composite material surface imprinted adsorbent. The preparation method is characterized by taking a yeast microsphere magnetic composite material as a matrix material, pyrethroid pesticide as template molecules, alpha-methacrylic acid (MAA) as functional monomers, ethylene glycol dimethacrylate (EGDMA) as a cross-linking agent and 2,2'-azobisisobutyronitrile (AIBN) as an initiator to prepare the yeast microsphere magnetic composite material surface imprinted adsorbent through a suspension polymerization process. The preparation method has the advantages that the template molecules are thoroughly removed, and the compatibility with an imprinted high polymer molecular layer is good. The prepared magnetic composite material surface imprinted adsorbent can be used for selectively identifying and separating pyrethroid pesticide in environmental water, and the problem that partial template molecules cannot be eluted due to too-deep embedding is avoided, and the obtained imprinted adsorbent is high in mechanical strength, identification points are not easily damaged, and nonspecific adsorption is great reduced.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, and in particular relates to a method for preparing a molecularly imprinted polymeric adsorption material on the surface of a yeast microsphere magnetic compound. Background technique [0002] Molecular imprinting technology uses the target molecule as a template molecule, selects covalent, non-covalent and semi-covalent functional monomers that can interact with the template molecule, and polymerizes under the trigger of a cross-linking agent to form Three-dimensional crosslinked polymer network. After the reaction is completed, the template molecules are eluted by extraction and other methods to form imprinted polymers (MIPs) with special structures, special affinity for template molecules and recognition holes. [0003] Surface molecular imprinting technology can better solve some serious defects of traditional molecular imprinting technology by establishing molecul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C08F222/14C08F220/06C08J9/26
Inventor 关卫省雷俊茹王旭周娅鲁琛琛
Owner CHANGAN UNIV
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