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Polymeric nanobead coated carbonyl iron particles and their magnetic property
Author(s) -
Fang Fei Fei,
Choi Hyoung Jin
Publication year - 2007
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200777356
Subject(s) - polystyrene , carbonyl iron , materials science , dispersion polymerization , suspension (topology) , magnetic nanoparticles , ferrofluid , magnetorheological fluid , suspension polymerization , sedimentation , composite number , dispersion (optics) , chemical engineering , polymerization , saturation (graph theory) , particle (ecology) , dispersion stability , composite material , spheres , nanoparticle , nanotechnology , magnetic field , polymer , optics , physics , mathematics , oceanography , engineering , biology , paleontology , quantum mechanics , homotopy , sediment , geology , pure mathematics , combinatorics , astronomy
Magnetic carbonyl iron (CI) particles have attracted great attention due to their high saturation magnetization and appropriate particle size for magnetorheological (MR) materials. However, hydrodynamic instability of the CI particle suspension which was attributed to the large density mismatch between the dispersed CI particles and the medium has affected its predominant role for MR applications. A novel magnetic CI/polystyrene (PS) composite with nano‐scaled PS spheres sprinkled on the surface of the CI particles was fabricated via a normal dispersion polymerization in this work. Physical properties, MR behaviors as well as the improvement in sedimentation problem were investigated. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)