Material approach to suppression of separation of magnetic components in MR fluid

-Optimization design of magnetically driven materials for robot mechanisms-

Abstract

We have already reported that nanoparticles and PO-type dispersion media are useful for suppressing the separation of magnetic materials in MR fluids. In particular, a structure design represented by the bond chain length and the number of amide groups in the PO type dispersion medium is important. Also, reducing the difference in specific gravity between the magnetic material and the dispersion medium effectively worked. In the test, a fluorine-based medium having a specific gravity of about twice that of a conventional hydrocarbon-based medium was used.