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Magnetic Polymer/Nickel Hybrid Nanoparticles Via Miniemulsion Polymerization
Author(s) -
Staudt Thiago,
Machado Thiago O.,
Vogel Nicolas,
Weiss Clemens K.,
Araujo Pedro H. H.,
Sayer Claudia,
Landfester Katharina
Publication year - 2013
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201300329
Subject(s) - miniemulsion , oleylamine , polystyrene , polymerization , nanoparticle , materials science , polymer chemistry , polymer , nickel , magnetic nanoparticles , chemical engineering , emulsion polymerization , radical polymerization , monomer , methyl methacrylate , nanotechnology , composite material , engineering , metallurgy
This work shows a method to synthesize and encapsulate magnetic nickel nanocrystals into polymeric colloidal particles through miniemulsion polymerization. The nickel nanoparticles are produced by a thermal decomposition method in the presence of oleylamine and triphenylphosphine, which results in a hydrophobic surface. However, being compatible with the monomer does not ensure a successful encapsulation by miniemulsion polymerization, as the nickel nanoparticles are expelled from the polymer particles with increasing styrene conversion due to the poor adhesion interaction between the organic shells of the nickel nanoparticles and the polystyrene. Changing the hydrophobic polystyrene to a polymer with higher polarity such as poly(methyl methacrylate) proves to be efficient for encapsulation of nickel nanoparticles when employing a hydrophilic initiator. After encapsulation, these nanoparticles show magnetic response.