Properties of Magnetorheological Suspension for Filled Clusters of Cobalt-Phthalocyanine/Iron Nanoparticles

Magnetorheological suspension(MRS)consists of methylic silicone oil and filled clusters ofcobalt-phthalocyanine/Iron(CoPc/Fe)nanoparticles,and the filled clusters have been obtained using method of composite in situ.Exhibited dynamic shear stress of the MRS induced by external magnetic field is in direct-ratio relation with strength of external magnetic field and concentration of the filled clusters in the MRS.The relation of shear stress with shear rate shows that the filled clusters of CoPc/Fe nanoparticles have arranged in chain by external magnetic field in the MRS.And it is little that the shear stress is affected by change of temperature.Response of the MRS is superior reversibility of changes in viscosity induced and the response time is faster than 0.1s by external magnetic field.