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US 9,283,619 B2Granted
Polarizable nanoparticles comprising coated metal nanoparticles and electrorheological fluid comprising same
AssigneeBaker Hughes Incorporated
InventorsOleg A. Mazyar, Soma Chakraborty, Terry R. Bussear, Michael H. Johnson
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Abstract
A nanoparticle composition includes a metal nanoparticle, and a continuous dielectric coating on a surface of the metal nanoparticle, the nanoparticle composition being a dielectric material. A nanoparticle is in addition the reaction product of an organometallic compound. An electrorheological fluid comprises the nanoparticle composition and a dielectric fluid, and a method of making an electrorheological fluid is also disclosed.
Claims20
A nanoparticle composition comprising:
- a metal nanoparticle, and
- a continuous dielectric coating on a surface of the metal nanoparticle, wherein the dielectric coating is a carbonaceous coating, metal nitride coating, metal carbide coating, or a combination comprising at least one of the foregoing coatings,
- the nanoparticle composition being a dielectric material,
- wherein the nanoparticle composition further comprises an additional nanoparticle, the additional nanoparticle comprising derivatized graphene, derivatized graphene fiber, derivatized nanotube, derivatized fullerene, derivatized graphite, derivatized carbon black, derivatized or underivatized nanoclay, a derivatized or underivatized inorganic nanoparticle, or a combination comprising at least one of the foregoing, wherein the inorganic nanoparticle is selected from a metal or metalloid carbide, a metal or metalloid nitride, and a metal or metalloid oxide.
1 more element
An electrorheological fluid, comprising:
- a nanoparticle composition comprising
- a metal nanoparticle,
- a continuous dielectric coating comprising a carbonaceous coating, metal oxide coating, metal nitride coating, metal carbide coating, or combination comprising at least one of the foregoing coatings, disposed on a surface of the metal nanoparticle, and
- wherein the nanoparticle composition further comprises an additional nanoparticle, the additional nanoparticle comprising derivatized graphene, derivatized graphene fiber, derivatized nanotube, derivatized fullerene, derivatized graphite, derivatized carbon black, derivatized or underivatized nanoclay, a derivatized or underivatized inorganic nanoparticle, or a combination comprising at least one of the foregoing, wherein the inorganic nanoparticle is selected from a metal or metalloid carbide, a metal or metalloid nitride, and a metal or metalloid oxide,
- the nanoparticle composition being a dielectric material;
- and
- an aqueous or non-aqueous base fluid.
4 more elements
Dependencies are inferred from the claim text.