The preparation of a polystyrene-iron composite by using ultrasound radiation

Wizel, S.; Margel, Shlomo; Gedanken, Aharon

doi:10.1002/(sici)1097-0126(200005)49:5<445::aid-pi294>3.0.co;2-9

Cited by 40 publications

(16 citation statements)

References 10 publications

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“…The presence of oxidized iron is supported by XPS and X-ray absorption near-edge spectroscopy (XANES) measurements. Nanosized amorphous iron was also imbedded in polystyrene [60] similarly.…”

Section: Starting Materialsmentioning

confidence: 88%

Sonochemistry and Other Novel Methods Developed for the Synthesis of Nanoparticles

Gedanken

Mastai

2004

The Chemistry of Nanomaterials

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Section: Starting Materialsmentioning

confidence: 88%

Sonochemistry and Other Novel Methods Developed for the Synthesis of Nanoparticles

Gedanken

Mastai

2004

The Chemistry of Nanomaterials

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“…In addition, dipolar interactions between particles [14], [4] may cause hysteresis even when the particle diameter is below the critical value. Other iron-polymer composites have shown behavior ranging from superparamagnetic to ferromagnetic depending on particle size [15], [9], [17].…”

Section: Magnetic Measurementsmentioning

confidence: 99%

“…Other iron-polymer nanocomposites are known, but the particles lack a tightly bound polymer coating and tend to be sensitive to oxidation [15], [9], [17].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of polymer-coated magnetic nanoparticles

et al. 2001

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Composite materials consisting of polystyrene-coated iron nanoparticles were prepared by the thermal decomposition of iron pentacarbonyl in the presence of polystyrene-tetraethylenepentamine dispersants. The nanocomposites contain both simple core-shell particles of 10-20 nm diameter, and more complex particles (20-100 nm) made from the agglomeration of several core-shell particles. Electron diffraction revealed that the core was composed of iron, in contrast to the iron nitride (Fe 3 N) reported for similar conditions with a polyisobutylene-based dispersant. The materials exhibit hysteresis and ranges from 7.6 to 29.3 emu/g. The coercivity goes through a maximum for particles of 25 nm diameter. Removal of unbound dispersant from the materials greatly increases the magnetization.

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“…Therefore ultrasound shows unique advantages in the preparation of nanomaterials. Ultrasonic irradiation has been used to prepare transition metal–polymer composites, such as polystyrene–iron,18 poly(methyl methacrylate)–iron19 and poly(methyl acrylate)–cobalt,20 by the polymerization of the monomer in N , N ′‐dimethylformamide (DMF) in the presence of metal nanoparticles. In our previous study,21–25 ultrasound was employed to prepare nanocomposites by emulsion polymerization.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonically initiated miniemulsion polymerization of styrene in the presence of Fe₃O₄ nanoparticles

Qiu

Wang

et al. 2005

Polymer International

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Ultrasonically initiated miniemulsion polymerization of styrene was conducted in the presence of Fe3O4 nanoparticles. Stable polystyrene (PS)/Fe3O4 nanocomposite emulsions were prepared and magnetic PS/Fe3O4 composite particles were obtained through magnetic separation. The whole procedure comprised two steps. First, Fe3O4 nanoparticles were dispersed in the monomer phase with the aid of stabilizer Span‐80. Second, miniemulsion polymerization of styrene in the presence of Fe3O4 nanoparticles was carried out under an ultrasonic field in the absence of a chemical initiator. The affecting factors, including stabilizer concentration, surfactant concentration, hexadecane concentration and the amount of Fe3O4, were systematically studied. Stabilizer concentration, surfactant concentration and hexadecane concentration strongly affected the formation of the coagulation. The least amount of coagulation was formed at 2.5 wt% Span‐80 concentration. The addition of Fe3O4 nanoparticles drastically increased the polymerization rate owing to the fact that Fe3O4 nanoparticles increased the acoustic intensity and Fe2+ reacted with H2O2 to produce hydroxyl radicals and increase the number of radicals. The increase in cosurfactant concentration and power output also increased the polymerization rate. Copyright © 2005 Society of Chemical Industry

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The preparation of a polystyrene-iron composite by using ultrasound radiation

Cited by 40 publications

References 10 publications

Sonochemistry and Other Novel Methods Developed for the Synthesis of Nanoparticles

Sonochemistry and Other Novel Methods Developed for the Synthesis of Nanoparticles

Preparation and characterization of polymer-coated magnetic nanoparticles

Ultrasonically initiated miniemulsion polymerization of styrene in the presence of Fe₃O₄ nanoparticles

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The preparation of a polystyrene-iron composite by using ultrasound radiation

Cited by 40 publications

References 10 publications

Sonochemistry and Other Novel Methods Developed for the Synthesis of Nanoparticles

Sonochemistry and Other Novel Methods Developed for the Synthesis of Nanoparticles

Preparation and characterization of polymer-coated magnetic nanoparticles

Ultrasonically initiated miniemulsion polymerization of styrene in the presence of Fe3O4 nanoparticles

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Product

Resources

About

Ultrasonically initiated miniemulsion polymerization of styrene in the presence of Fe₃O₄ nanoparticles