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Characterization of stabilized porous magnetite core–shell nanogel composites based on crosslinked acrylamide/sodium acrylate copolymers

Authors

  • Magda A Akl,

    1. Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt
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  • Ayman M Atta,

    Corresponding author
    1. Chemistry Department, College of Science, King Saud University, Riyadh, Saudi Arabia
    2. Petroleum Application Department, Egyptian Petroleum Research Institute, Cairo, Egypt
    • Correspondence to: Ayman M Atta, Chemistry Department, College of Science, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia. E-mail: aatta@ksu.edu.sa

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  • Abd El-Fatah M Yousef,

    1. Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt
    2. Petroleum Application Department, Egyptian Petroleum Research Institute, Cairo, Egypt
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  • Mohamed I Alaa

    1. Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt
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Abstract

Stabilized and dispersed superparamagnetic porous nanogels based on sodium acrylate (AA-Na) and acrylamide (AM) in a surfactant-free aqueous system were synthesized via solution polymerization at room temperature. The formation of magnetite nanoparticles was confirmed and their properties characterized using Fourier transform infrared spectroscopy. Extensive characterization of the magnetic polymer particles using transmission electron microscopy (TEM), dynamic light scattering and zeta potential measurements revealed that Fe3O4 nanoparticles were incorporated into the shells of poly(AM/AA-Na). The average particle size was 5–8 nm as determined from TEM. AM/AA-Na nanoparticles with a diameter of about 11 nm were effectively assembled onto the negatively charged surface of the as-synthesized Fe3O4 nanoparticles via electrostatic interaction. Crosslinked magnetite nanocomposites were prepared by in situ development of surface-modified magnetite nanoparticles in an AM/AA-Na hydrogel. Scanning electron microscopy was used to study the surface morphology of the prepared composites. The morphology, phase composition and crystallinity of the prepared nanocomposites were characterized. Atomic force microscopy and argon adsorption–desorption measurements of Fe3O4.AM/AA indicated that the architecture of the polymer network can be a hollow porous sphere or a solid phase, depending on the AA-Na content. © 2013 Society of Chemical Industry

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