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Process for preparing polystyrene/Fe3O4 composite magnetic micro ball

A technology of polystyrene microspheres and composite magnetism, which is applied in the field of preparation of composite magnetic microspheres and can solve problems such as pollution

Inactive Publication Date: 2006-11-08
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies that the chemical plating method in the prior art can only deposit metal on the surface of polymer microspheres and the waste liquid of chemical plating pollutes the environment, the present invention provides a polystyrene / Fe 3 o 4 Preparation method of composite magnetic microspheres

Method used

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  • Process for preparing polystyrene/Fe3O4 composite magnetic micro ball
  • Process for preparing polystyrene/Fe3O4 composite magnetic micro ball
  • Process for preparing polystyrene/Fe3O4 composite magnetic micro ball

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Example 1: Mix 2g polystyrene microspheres with 20g concentration of 98% sulfuric acid, stir magnetically and condense to reflux, the reaction temperature is 40°C, and the reaction time is 8h. After the reaction, the solid matter is centrifuged, and the concentration is respectively Wash with 2% NaOH dilute solution and distilled water to obtain sulfonated polystyrene microspheres with negative charge on the surface;

[0019] Disperse 1 g of the sulfonated polystyrene microspheres with a negative charge on the surface in 8 g of polydiallyldimethylammonium chloride aqueous solution with a concentration of 1 mg / (ml 0.5 M NaCl), let it stand for adsorption for 20 minutes, and then wash with centrifugal water ;

[0020] Then disperse in 8g of sodium polystyrene sulfonate aqueous solution with a concentration of 0.5mg / (ml 0.5M NaCl), let it stand for 20min for adsorption, and then centrifuge and wash with water;

[0021] Then disperse in 8g of polydiallyldimethylammonium ch...

Embodiment 2

[0023] Embodiment 2: Mix 1g polystyrene microspheres with 12g concentration of sulfuric acid that is 98%, magnetic stirring and condensing reflux, reaction temperature 50 DEG C, reaction time 10h, centrifuge and separate solid matter after reaction, use concentration respectively Wash with 2% NaOH dilute solution and distilled water to obtain sulfonated polystyrene microspheres with negative charge on the surface;

[0024] Disperse 1 g of the above-mentioned sulfonated polystyrene microspheres with negative charge on the surface in 10 g of polydiallyldimethylammonium chloride aqueous solution with a concentration of 1 mg / (ml 0.5M NaCl), let it stand for adsorption for 30 minutes, and then wash it with centrifuge and water ;

[0025] Disperse in 10 g of sodium polystyrene sulfonate aqueous solution with a concentration of 0.5 mg / (ml 0.5 M NaCl), let stand for adsorption for 30 min, and then centrifuge and wash with water;

[0026] Then disperse in 10g of polydiallyldimethylamm...

Embodiment 3

[0030] Embodiment 3: 2g polystyrene microspheres and 26g concentration are the sulfuric acid that is 98% to mix uniformly, magnetic stirring and condensing reflux, reaction temperature 50 ℃, reaction time 11h, centrifuge and separate solid matter after reaction, respectively with the concentration of Wash with 2% NaOH dilute solution and distilled water to obtain sulfonated polystyrene microspheres with negative charge on the surface;

[0031] Disperse 1 g of the above-mentioned sulfonated polystyrene microspheres with negative charge on the surface in 11 g of polydiallyldimethyl ammonium chloride aqueous solution with a concentration of 1 mg / (ml 0.5M NaCl), let stand for adsorption for 30 min, and then wash with centrifugal water ;

[0032] Disperse again in 11 g of sodium polystyrene sulfonate aqueous solution with a concentration of 0.5 mg / (ml 0.5 M NaCl), let stand for adsorption for 40 min, and then centrifuge and wash with water;

[0033] Then disperse in 10g of polydia...

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Abstract

The preparation process of composite magnetic microball includes the following steps: mixing polystyrene micorball with concentrated sulfuric acid to sulfonate polystyrene micorball; dispersing the sulfonated polystyrene micorball with surface negative charge successively in ammonium polydiallyl dimethyl chloride aqua, sodium polystyrene sulfonate aqua and ammonium polydiallyl dimethyl chloride aqua for standing adsorption before centrifugal water washing; dispersing in dilute magnetic fluid liquid for standing adsorption before centrifugal water washing; repeating the two standing adsorption steps until reaching the required layer number of ammonium polydiallyl dimethyl chloride and Fe3O4 of the composite magnetic microball. The said process is completed in aqua and has no environmental pollution.

Description

technical field [0001] The present invention relates to a kind of preparation method of composite magnetic microsphere, especially polystyrene / Fe 3 o 4 Preparation method of composite magnetic microspheres. Background technique [0002] Organic / inorganic composite magnetic microspheres with polymer materials as the core and inorganic magnetic substances as the shell have both the excellent properties of core materials and shell materials. They are used in microwave absorbing materials, photonic crystals, magnetic materials, cell biology, and molecular biology. It shows broad application prospects in many fields such as medicine and medicine. [0003] The literature "Zhao Wen, Zhang Qiuyu, Wang Jieliang, etc. Preparation of polystyrene magnetic microspheres by electroless plating method. Material Protection, 2004, 37(12): 27-28" discloses an electroless plating method to prepare polystyrene magnetic microspheres In this method, the polymer polystyrene microspheres are firs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08J3/12C08K3/22
Inventor 张秋禹赵雯任华王结良张军平张和鹏
Owner NORTHWESTERN POLYTECHNICAL UNIV
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