Method for preparing porous magnetic imprinting absorption agent through emulsion polymerization

A technology of emulsion polymerization and imprinted adsorption, applied in the direction of selective adsorption, chemical instruments and methods, alkali metal compounds, etc., can solve problems such as damage to the central nervous system, endocrine disturbance, and adverse health effects, and achieve high adsorption capacity, rapid separation and Effect of temperature recognition, good magnetic response properties

Inactive Publication Date: 2013-10-16
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, pyrethroid residues in the environment may damage the central nervous system and are suspec

Method used

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  • Method for preparing porous magnetic imprinting absorption agent through emulsion polymerization
  • Method for preparing porous magnetic imprinting absorption agent through emulsion polymerization
  • Method for preparing porous magnetic imprinting absorption agent through emulsion polymerization

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Embodiment 1

[0044] 1. A method for preparing porous magnetic imprinted adsorbent by Pickering emulsion polymerization

[0045] (1) Activation of halloysite nanotubes (HNTs)

[0046] The massive halloysite nanotubes are ground and crushed through 100 sieves, and the halloysite nanotubes are 70% in 3.0mol / L nitric acid o C reflux for 10 hours. Wash with distilled water until neutral, and dry in vacuum. at 200 oC Calcined at high temperature for 2 hours, subsequently, at 50 o Dry at C for later use.

[0047] (2) Magnetic halloysite nanotubes (HNTs / Fe 3 o 4 ) synthesis and vinyl modification

[0048] 0.05g Fe(NO 3 )×9H 2 O and 0.10 g of activated halloysite nanotubes were added to 10 ml of ethanol. Dry naturally after ultrasonic dispersion. Soak in propionic acid vapor at 80°C for 15 hours. The mixture was then calcined at 265°C for 2 hours under nitrogen protection. After cooling to room temperature, the prepared magnetic halloysite nanotubes were washed with diluted hydrochlor...

Embodiment 2

[0068] 1. A method for preparing porous magnetic imprinted adsorbent by Pickering emulsion polymerization

[0069] (1) Activation of halloysite nanotubes (HNTs)

[0070] The massive halloysite nanotubes are ground and crushed through 100 sieves, and the halloysite nanotubes are 70% in 3.5mol / L nitric acid o C reflux for 8 hours. Wash with distilled water until neutral, and dry in vacuum. at 200 oC Calcined at high temperature for 2 hours, subsequently, at 60 o Dry at C for later use.

[0071] (2) Magnetic halloysite nanotubes (HNTs / Fe 3 o 4 ) synthesis and vinyl modification

[0072] 0.05g Fe(NO 3 )×9H 2 O and 0.05 g of activated halloysite nanotubes were added to 5 ml of ethanol. Ultrasonic dispersion, dry naturally. Soak in propionic acid vapor at 80°C for 12 hours. The mixture was then calcined at 265°C for 2 hours under nitrogen protection. After cooling to room temperature, the prepared magnetic halloysite nanotubes were washed with diluted hydrochloric acid...

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Abstract

The present invention relates to a method for preparing a porous magnetic imprinting absorption agent through emulsion polymerization, and belongs to the technical field of environment function material preparation. The method comprises: preparing magnetic halloysite, carrying out vinyl modification on the halloysite, adopting a dispersion solution of the modified magnetic halloysite and 2,2'-azobis(2-methylpropionamidine) dihydrochloride as a water phase, adopting a mixture of a template molecule cyhalothrin, a function monomer methacrylic acid, a cross-linking agent ethylene glycol dimethacrylate, a pore-forming agent and an organic solvent chloroform as an oil phase, mixing the water phase and the oil phase, carrying out an ultrasonic treatment to prepare stable Pickering emulsion, carrying out polymerization to prepare porous magnetic imprinting, adopting a methanol and acetic acid mixing solution to wash to remove the template molecule, and carrying out vacuum drying on the obtained porous magnetic imprinting at a temperature of 50 DEG C, wherein the obtained product is used for selective recognition and separation of cyhalothrin in an aqueous solution. The prepared porous magnetic imprinting absorption agent has characteristics of significant thermal stability, significant magnetic stability, high absorption capacity, and significant cyhalothrin molecule recognition property.

Description

technical field [0001] The invention relates to a method for preparing a porous magnetic imprinting adsorbent by using Pickering emulsion polymerization, which belongs to the technical field of preparation of environmental functional materials. [0002] Background technique [0003] Molecularly imprinted polymers (MIPs) are a class of adsorbents that can specifically adsorb template molecules. In the process of preparing MIPs, the oil-in-water emulsion reaction system can greatly reduce the use of organic solvents and reduce environmental pollution. Wherein, the Pickering emulsion is a soap-free emulsion in which solid particles are used instead of surfactants as the stabilizer of the emulsion. Pickering emulsion has its own advantages: it can greatly reduce the use of surfactants, save costs and be friendly to the environment. In the past few decades, Pickering emulsions have been applied in the preparation of core-shell composite micro-nanoparticles. By using specific ...

Claims

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Application Information

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IPC IPC(8): C08F222/14C08F220/06C08F2/44C08F2/24C08J9/26B01J20/26B01J20/28B01D15/08
Inventor 杭辉潘建明戴江栋孟敏佳卫潇李春香
Owner JIANGSU UNIV
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