Magnetorheological Fluid And Braking Device
AssigneeSeiko Epson Corporation
InventorShigeki KAWADA
Life of this patent
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Abstract
A magnetorheological fluid includes: a metal magnetic particle having a surface modified with an ionic liquid modifying site having a first cationic group and a first anionic group; and an ionic liquid dispersion medium having a second cationic group and a second anionic group, in which the first cationic group and the second cationic group are same kind of cation and are selected from the group including a quaternary ammonium ion, an imidazolium ion, a pyridinium ion, and a phosphonium ion, and the first anionic group and the second anionic group are each selected from the group including a tetrafluoroborate ion, a hexafluorophosphate ion, a trispentafluoroethyl trifluorophosphate ion, a bis(trifluoromethanesulfonyl)amide ion, a hydrogen phthalate ion, and a bisfluorosulfuryl imide ion.
Claims12
A magnetorheological fluid comprising:
- a metal magnetic particle having a surface modified with an ionic liquid modifying site having a first cationic group and a first anionic group;
- and
- an ionic liquid dispersion medium having a second cationic group and a second anionic group, wherein
- the first cationic group and the second cationic group are same kind of cation and are selected from the group including a quaternary ammonium ion, an imidazolium ion, a pyridinium ion, and a phosphonium ion, and
- the first anionic group and the second anionic group are each selected from the group including a tetrafluoroborate ion, a hexafluorophosphate ion, a trispentafluoroethyl trifluorophosphate ion, a bis(trifluoromethanesulfonyl)amide ion, a hydrogen phthalate ion, and a bisfluorosulfuryl imide ion.
Dependencies are inferred from the claim text.