Preparation method of porous magnetic polymeric microspheres containing active polymerization sites

An active polymerization and polymer technology, which is applied in the field of preparation of porous magnetic polymer microspheres containing active polymerization sites, can solve the problems of easy loss and oxidation, unseen, poor magnetic stability, etc., and achieves a wide application value. Effect

Active Publication Date: 2018-01-05
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported that a magnetic high-internal phase system was prepared by using magnetic particles as an auxiliary emulsifier for magnetic porous materials (J.Mater.Chem., 2011, 21, 12865–12872). The magnetic particles in the above method are located on the surface of the porous material, and the magnetic stability is poor. Easily lost and oxidized
However, there has been no report on the preparation of magnetic porous spheres containing active polymerization sites by embedding magnetic particles in a high internal phase framework and adding an active free radical control agent.

Method used

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  • Preparation method of porous magnetic polymeric microspheres containing active polymerization sites
  • Preparation method of porous magnetic polymeric microspheres containing active polymerization sites
  • Preparation method of porous magnetic polymeric microspheres containing active polymerization sites

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Example 1: Preparation of Porous Magnetic Polymer Microspheres Containing Active Polymerization Sites

[0029] Dissolve 0.06g of azobisisobutyronitrile in a mixture of 2.1g of glycidyl methacrylate and 3g of divinylbenzene; add 0.075g of 1,1-diphenylethylene, 1.5g of Span-80 and 0.225g of ferric oxide nanoparticles modified by oleic acid were fully mixed and ultrasonically dispersed to obtain the continuous phase; 27.84g of calcium chloride aqueous solution with a mass fraction of 5% was weighed as the dispersed phase; the continuous phase was placed In a three-necked flask, add the dispersed phase dropwise under mechanical stirring, and continue stirring for 30 minutes after the dropwise addition to obtain a water-in-oil type high internal emulsion. The dropping speed was controlled at 0.4mL / min, and the stirring speed was 500r / min; the obtained high internal emulsion was transferred to a syringe, and the emulsion was added dropwise to the aqueous solution of polyvinyl...

Embodiment 2

[0030] Example 2: Preparation of Porous Magnetic Polymer Microspheres Containing Active Polymerization Sites

[0031] Dissolve 0.10g of azobisisobutyronitrile in a mixture of 2.0g of glycidyl methacrylate, 2.0g of methyl methacrylate and 4.5g of ethylene glycol dimethacrylate; add 0.20g of 1-phenyl-1-naphthylethylene, 3.0g of Span-60 and 4.8g of ferric oxide nanoparticles modified by oleic acid, fully mixed, and ultrasonically dispersed to obtain a continuous phase; weigh 49.8g with a mass fraction of 4 % calcium chloride aqueous solution is used as the dispersed phase; the continuous phase is placed in a three-necked flask, and the dispersed phase is added dropwise to it under mechanical stirring, and the stirring is continued for 30 minutes after the addition is completed to obtain a water-in-oil type high internal emulsion. The dropping speed was controlled at 0.3mL / min, and the stirring speed was 400r / min; the obtained high internal emulsion was transferred to a syringe, a...

Embodiment 3

[0032] Example 3: Preparation of Porous Magnetic Polymer Microspheres Containing Active Polymerization Sites

[0033] Dissolve 0.06g of azobisisobutyronitrile in a mixture of 3.0g of methyl methacrylate and 3.6g of 1,1-diphenylethylene; add 0.06g of 1-phenyl-1- Naphthylethylene, 1.5g of Tween-60 and 0.24g of ferric oxide nanoparticles modified by oleic acid were mixed thoroughly and ultrasonically dispersed to obtain a continuous phase; 42.3g of calcium chloride aqueous solution with a mass fraction of 7% was weighed as a dispersion phase; the continuous phase was placed in a three-necked flask, and the dispersed phase was added dropwise to it under mechanical stirring, and the stirring was continued for 30 minutes after the dropwise addition was completed to obtain a water-in-oil type high internal emulsion. The dropping rate was controlled at 0.6mL / min, and the stirring speed was 450r / min; the obtained high internal emulsion was transferred to a syringe, and the emulsion was...

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Abstract

The invention relates to a method for preparing porous magnetic polymeric microspheres containing active polymerization sites. By combining a high internal phase method and a microfluidic method, theporous magnetic polymeric microspheres containing active polymerization sites are prepared through one-step polymerization. The microspheres are typically characterized by large interconnected pore channels with magnetic properties that facilitate separation under the influence of an external magnetic field, and can be surface-modified through polymerization by simple addition of functional group-containing monomers. The porous magnetic polymeric microspheres containing active polymerization sites have wide application value in water treatment in an open environment, separation of a target ina fermentation broth, organic synthesis of a catalyst carrier and the like.

Description

technical field [0001] The invention belongs to the field of porous polymer materials, and relates to a preparation method of porous magnetic polymer microspheres containing active polymerization sites. Background technique [0002] Porous polymer microspheres are widely used in chemical product purification, metallurgy, water treatment, catalysis, medicine and other fields due to their rich pore structure, high specific surface area, and diversity of surface functional groups. At present, there are many types of porous polymer microspheres, covering different particle size scales, different matrix skeleton structures, different pore sizes and specific surface areas, different surface functional groups, and composite porous polymer microspheres, etc. There are also many preparation methods, including traditional suspension Polymerization, emulsion polymerization, dispersion polymerization, precipitation polymerization, mechanical granulation, solvent evaporation, etc. There ...

Claims

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Application Information

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IPC IPC(8): C08F212/36C08F220/32C08F212/08C08F222/14C08F220/14C08F212/32C08F212/06C08F220/18C08F2/44C08K9/04C08K3/22B01J13/14C08J9/26H01F1/42
Inventor 张宝亮呼延钰张秋禹张和鹏王继启卜军
Owner NORTHWESTERN POLYTECHNICAL UNIV
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