Self-assembly of graphene oxide coated soft magnetic carbonyl iron particles and their magnetorheology

Posted on January 30, 2014 by Nanthakumar Victor Emmanuel, P.Eng Leave a comment

The surface of carbonyl iron (CI) microspheres was modified with graphene oxide (GO) as a coating material using 4-aminobenzoic acid as the grafting agent. The morphology, elemental composition, and magnetic properties of the GO-coated CI (GO/CI) particles were examined byscanning electron microscopy, energy dispersive X-ray spectroscopy and vibrating samplemagnetometry, respectively, confirming their composite formation. The magnetorheological(MR) performance of the GO/CI particle-based suspension was examined using a rotational rheometer connected to a magnetic field supply. The GO/CI particles suspension exhibited typical MR properties with increasing shear stress and viscosity depending on the appliedmagnetic field strength.

Source: http://scitation.aip.org/content/aip/journal/jap/115/17/10.1063/1.4863381