Preparation of magnetic polymer nanosphere and its profile control

Fe 3 O 4 nanoparticles with a particle size of approximately 16.5 nm were prepared by the chemical coprecipitation method with the raw materials of ferric chloride, ferrous chloride, and sodium hydroxide. The optimum reaction conditions were determined by the single factor control method; then, magn...

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Bibliographic Details
Published in:Journal of dispersion science and technology 2020-03, Vol.41 (4), p.557-565
Main Authors: Zhou, Ming, Zou, Jiaxi, Gu, Yinhua, Yi, RongJun, Tu, Hongjun
Format: Article
Language:English
Subjects:
Chemical synthesis
Emulsion polymerization
Ferric chloride
Flooding
Iron chlorides
Iron oxides
Magnetic permeability
Magnetism
microemulsion polymerization
Microemulsions
Morphology
Nanoparticles
nanosphere
Nanospheres
Organic chemistry
Polymers
profile control
Raw materials
separation
Sodium hydroxide
Superparamagnetism
Thermal stability
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Summary:Fe 3 O 4 nanoparticles with a particle size of approximately 16.5 nm were prepared by the chemical coprecipitation method with the raw materials of ferric chloride, ferrous chloride, and sodium hydroxide. The optimum reaction conditions were determined by the single factor control method; then, magnetic polymer nanoparticles were produced by microemulsion polymerization, and the synthesis conditions were optimized by orthogonal experiments with four factors and three levels. As expected, spherical particles of approximately 60 nm were obtained. The morphology, structure, and properties of the product were characterized and analyzed. The results showed that the particles possessed a uniform spherical shape, good thermal stability, and superparamagnetism, which will ensure these particles have a wide application of directional flooding profile control. Average EOR of magnetic polymer nanospheres with magnetic field was 14.41 wt%. The magnetized magnetic polymer nanospheres had better profile control ability, and were less damage to the low permeability layer. Separation experiment showed that magnetized magnetic polymer nanospheres can be effectively separated due to the low viscosity and the good magnetism. Furthermore, the separated polymer nanospheres can be reused again.
ISSN:0193-2691
1532-2351
DOI:10.1080/01932691.2019.1593860