Magnetorheology of dimorphic magnetorheological fluids based on iron nanorods

2nd International Conference on Rheology and Modeling of Materials

Sedlacik, M.^1 ; Pavlinek, V.^1

Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín, Zlín, Czech Republic^1

关键词: Dispersed phase;    Magneto-rheological;    Magneto-rheology;    Oscillatory shear;    Partial substitution;    Sedimentation stability;    Steady shear flow;    Vibrating sample magnetometry;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/790/1/012031/pdf
DOI  :  10.1088/1742-6596/790/1/012031

来源: IOP

【 摘 要 】

The aim of this paper is to document suitability of partial substitution of magnetic carbonyl iron (CI) microspheres with iron nanorods to obtain dimorphic magnetorheological (MR) suspensions with comparable MR performance to conventional MR suspensions exclusively based on (CI) microspheres while the sedimentation stability is considerably improved. The morphology of CI and iron nanorods was analyzed via scanning electron microscopy and transmission electron microscopy, respectively, and magnetic properties via vibrating sample magnetometry. The steady shear flow and small-amplitude dynamic oscillatory shear measurements were carried out to confirm effective MR performance. The sedimentation test showed positive role of dimorphic composition of dispersed phase on the sedimentation stability.