Title :
Encapsulation of spherical iron-particle with PMMA and its magnetorheological particles
Author :
Cho, Min S. ; Lim, Sung T. ; Jang, In B. ; Choi, Hyoung J. ; Jhon, Myung S.
Author_Institution :
Dept. of Polymer Sci. & Eng., Inha Univ., Incheon, South Korea
fDate :
7/1/2004 12:00:00 AM
Abstract :
Composite magnetic particles (CMP) with carbonyl iron (CI) core and poly(methyl methacrylate) shell were prepared by an in-situ dispersion polymerization method via surface treated CI with acrylic acid. These CMP were adopted as dispersed phase of magnetorheological (MR) fluids, and has better MR fluids characteristics than fluid with CI alone as they have severe sedimentation and poor dispersion quality. Flow properties of the MR fluids were analyzed via a rotational rheometer equipped with a magnetic field supplier in parallel plate geometry.
Keywords :
carbon compounds; composite particles; flow; magnetic fluids; magnetic particles; magnetorheology; polymerisation; polymers; MR fluid flow properties; acrylic acid; carbonyl iron core; composite magnetic particles; dispersion quality; in-situ dispersion polymerization; magnetic field supplier; magnetorheological fluids; magnetorheological particles; parallel plate geometry; poly methyl methacrylate shell; rotational rheometer; sedimentation; spherical iron-particle encapsulation; surface treatment; Encapsulation; Iron; Magnetic analysis; Magnetic cores; Magnetic fields; Magnetic liquids; Magnetic particles; Magnetic properties; Polymers; Surface treatment; Carbonyl iron; PMMA; composite; magnetorheological fluid; methyl methacrylate; poly;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2004.830413
