Preparation method of magnetic polymer inorganic composite micro-sphere

A technology of composite microspheres and polymers, which is applied in the field of preparation of magnetic polymer inorganic composite microspheres, can solve the problems of complex magnetic composite microspheres, achieve light density, simplify the process, and reduce the density

Inactive Publication Date: 2009-10-07
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In order to avoid the deficiencies of the prior art, the present invention proposes a method for preparing magnetic polymer inorganic

Method used

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  • Preparation method of magnetic polymer inorganic composite micro-sphere
  • Preparation method of magnetic polymer inorganic composite micro-sphere
  • Preparation method of magnetic polymer inorganic composite micro-sphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1 adopts ferric chloride to prepare porous magnetic powder:

[0044] Dissolve 13.5 g of ferric chloride in 100 g of water, add 50 g of 10 wt % sodium hydroxide solution, stir at room temperature for 30 min, and wash the obtained ferric hydroxide suspension with water three times. Pour the ferric hydroxide suspension into 100mL of 24wt% citric acid solution vigorously stirred at 70°C, then add 0.86g of barium carbonate and 6.49g of template n-butylamine, stir and evaporate at 75°C to make the solution into a viscous gel. After drying the viscous gel at 120°C, bake it at 550°C for 4 hours to remove the template agent and obtain porous magnetic powder.

[0045] The density of the obtained magnetic powder measured by the pycnometer method is 2.85g / cm 3 , the average pore diameter is 8.62nm.

Embodiment 2

[0046] Embodiment 2 adopts ferric nitrate to prepare porous magnetic powder:

[0047] Dissolve 20.2 g of ferric nitrate in 50 g of water, add 50 g of 10 wt % sodium hydroxide solution, stir at room temperature for 30 min, and wash the obtained ferric hydroxide suspension with water three times. Pour the ferric hydroxide suspension into 100mL of 24wt% citric acid solution vigorously stirred at 70°C, then add 0.86g of barium carbonate and 1.54g of template n-butylamine, stir and evaporate at 75°C to make the solution into a viscous gel. After drying the viscous gel at 120°C, bake it at 550°C for 4 hours to remove the template agent and obtain porous magnetic powder.

Embodiment 3

[0048] Embodiment 3 adopts ferric chloride to prepare porous magnetic powder:

[0049]Dissolve 13.5 g of ferric chloride in 50 g of water, add 50 g of 10 wt % sodium hydroxide solution, stir at room temperature for 30 min, and wash the obtained ferric hydroxide suspension with water three times. Pour the ferric hydroxide suspension into 100mL of 24wt% citric acid solution vigorously stirred at 70°C, then add 0.86g of barium carbonate and 4g of template agent hexamethylenediamine, stir and evaporate at 75°C to make the solution into a viscous gel. After drying the viscous gel at 120°C, bake it at 550°C for 4 hours to remove the template agent and obtain porous magnetic powder.

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Abstract

The invention relates to a preparation method of a magnetic polymer inorganic composite micro-sphere and is technically characterized in that a suitable template agent is added and a magnetic polymer micro-sphere is obtained with a suspension polymerization method after porous magnetic particles with a sol-gal process are prepared. As the template agent is added in the processes of the sol-gal or hydro-thermal synthesis and is removed after the high-temperature calcinations, the magnetic particles are caused to have the porous structure, thus reducing the density of the magnetic particles and simplifying the preparation process of the magnetic micro-sphere. Magnetic composite micro-spheres with multiple function groups on the surfaces are prepared according to needs. The magnetic substance is porous and the density of the magnetic substance is effectively decreased, thus being beneficial to suspension polymerization. The porous magnetic particles with lower density simplify the process of suspension polymerization. The magnetic micro-spheres or porous magnetic composite micro-spheres with magnetic responsiveness can be prepared when small quantities of magnetic substances(less than 20 percent of usage of monomer) are added.

Description

technical field [0001] The invention relates to a preparation method of magnetic polymer inorganic composite microspheres, which is a method for preparing magnetic composite microspheres by using large-diameter ferrite as a magnetic source. Background technique [0002] Magnetic polymer / inorganic composite microspheres refer to microspheres with certain magnetic properties and special structures formed by combining organic polymers and inorganic magnetic materials by appropriate methods. Because magnetic polymer microspheres have many characteristics and magnetic responsiveness of polymer microspheres at the same time, they can not only endow their surface with functional groups by means of copolymerization and surface modification, but also can be separated conveniently and quickly under an external magnetic field, so magnetic Microspheres have shown strong vitality in the fields of biomedicine, cytology, bioengineering, and environmental detection. [0003] At present, th...

Claims

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Application Information

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IPC IPC(8): B01J13/02B01J13/14H01F1/113
Inventor 张秋禹金凤张和鹏张军平郭飞鸽
Owner NORTHWESTERN POLYTECHNICAL UNIV
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