STRUCTURE OF IRON/PROTEIN COMPLEX PARTICLE AND ITS MR PROPERTIES

Magnetorheological fluid (MRF) has drawn much attention due to its powerful shearing stress. The yield stress of MRF is about ten times greater than that of electrorheological fluid (ERF). But a projecting question is the subsidence of particles as a result of gravity for magnetorheological fluid. Fe particles have been prepared with microemulsion, and being coated by protein, polymeric protein-Fe particles have been obtained. The preparation of MRF, and XRD,TEM,IR analysis of surface structure for protein-Fe have been reported in the paper. The magnetorheological, temperature effects and subsidence stability have been investigated also on MRF of protein-Fe. The results show that the protein-Fe is a complex particle composition from crystal α-Fe and non-crystal protein. The magnetorheological fluid has good magnetorheological effect, and its subsidence stability is excellent compared with the single carbonyl iron.