Suspension polymerization preparation method of polystyrene-coated ferriferrous oxide composite particle

A magnetic composite particle, ferric oxide technology, applied in the direction of iron oxide/iron hydroxide, organic material/organic magnetic material, ferrous oxide, etc. High requirements, poor dispersion and other problems, to achieve the effect of low price, simple coating operation and good economy

Inactive Publication Date: 2015-03-11
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nanoparticles synthesized by co-precipitation method have uneven particle size, poor dispersion, easy to agglomerate, easy to oxidize, etc.; although the size of nanoparticles produced by thermal decomposition method is relatively uniform, the conditions for synthesis are relatively high, and generally high temperature is required. High-pressure reactor, the temperature should be maintained at about 180°C

Method used

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  • Suspension polymerization preparation method of polystyrene-coated ferriferrous oxide composite particle
  • Suspension polymerization preparation method of polystyrene-coated ferriferrous oxide composite particle
  • Suspension polymerization preparation method of polystyrene-coated ferriferrous oxide composite particle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Take 30ml of n-octane solution and add it to a three-necked flask, and place it in a water bath at 25°C;

[0030] 2. Weigh 0.444g (0.01mol) of ferrous sulfate and 0.864g (0.02mol) of ferric chloride to form a 20ml solution, and slowly add it into the three-necked flask with a syringe under sufficient stirring;

[0031] 3. Weigh 4.0g of sodium oleate to make 20mL solution, take 1ml of sodium oleate solution, and slowly add it into the three-neck flask with a syringe under sufficient stirring;

[0032] 4. Take 1.8 mL of ammonia water with a mass fraction of 27%, slowly add it into a three-necked flask with a syringe, age in a water bath for 2 hours, wash with ethanol for several times, and centrifuge at 10,000 rpm to obtain oil-soluble ferric oxide.

[0033] 5. Take 1 g of the above-mentioned oil-soluble ferric oxide, 16.91 ml of styrene (washed three times with 5% sodium hydroxide solution), and 0.9 g of benzoyl peroxide and ultrasonically mix them for 1 h and set asi...

Embodiment 2

[0037] 1. Take 30ml of n-octane solution and add it to a three-necked flask, and place it in a water bath at 25°C;

[0038] 2. Weigh 0.444g (0.01mol) of ferrous sulfate and 0.864g (0.02mol) of ferric chloride to form a 20ml solution, and slowly add it into the three-necked flask with a syringe under sufficient stirring;

[0039] 3. Weigh 4.0g of sodium oleate to make 20mL solution, take 1ml of sodium oleate solution, and slowly add it into the three-neck flask with a syringe under sufficient stirring;

[0040] 4. Take 1.8 mL of ammonia water with a mass fraction of 27%, slowly add it into a three-necked flask with a syringe, age in a water bath for 2 hours, wash with ethanol for several times, and centrifuge at 10,000 rpm to obtain oil-soluble ferric oxide.

[0041] 5. Take 1 g of the above-mentioned oil-soluble ferric oxide, 16.91 ml of styrene (washed three times with 5% sodium hydroxide solution) and 2.0 g of benzoyl peroxide and ultrasonically mix them for 1 h and set asid...

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Abstract

The invention relates to a suspension polymerization preparation method of a polystyrene-coated ferriferrous oxide composite particle. The method comprises the following steps: placing a n-octane solution in a water bath, adding a mixed solution of ferrous sulfate and ferric chloride, then adding sodium oleate and ammonia water to carry out reactions to obtain oil-soluble ferriferrous oxide; mixing the obtained ferriferrous oxide, polystyrene, and benzoyl peroxide under supersonic waves to obtain a mixed solution, adding a dispersant and deionized water, carrying out reactions for 4 to 6 hours at a temperature of 90 DEG C, washing, separating, and drying so as to obtain the polystyrene-coated ferriferrous oxide magnetic composite particles. The preparation method has the advantages of simple operation and mild reaction conditions. The obtained magnetic composite particles are evenly dispersed, are stable, and thus have a good application prospect.

Description

technical field [0001] The invention belongs to the field of preparation of magnetic composite materials, in particular to a method for preparing polystyrene-coated ferric iron tetroxide magnetic composite particles by a suspension polymerization method. Background technique [0002] Due to its unique physical and chemical properties, such as small size effect, surface and interface effect and macroscopic quantum tunneling effect, ferroferric oxide nano-magnetic materials show different properties from conventional materials. It is often used as recording materials, pigments, magnetic fluid materials, catalysts, magnetic polymer microspheres and electronic materials, etc. It also has good application prospects in the fields of biotechnology and medicine. Ferroferric oxide has good magnetic properties, and the composite material coated with polystyrene can be used in in vitro detection of diseases, and has important medical application value. Therefore, it is of great signif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F112/08C08F2/20C08F2/44C08K3/22C08J3/12C01G49/08H01F1/42
Inventor 周兴平雷静雯
Owner DONGHUA UNIV
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