THERMALLY CONDUCTIVE NANOCOMPOSITION AND METHOD OF MAIKING THE SAME

• US 20140339780A1
• Filed: 07/31/2014
• Published: 11/20/2014
• Est. Priority Date: 02/02/2012
• Status: Active Grant

• Current Assignee: Baker Hughes Incorporated (Baker Hughes Company)
• Original Assignee: Baker Hughes Incorporated (Baker Hughes Company)
• Inventors: Mazyar, Oleg A., Leonard, Ashley D., Falkner, Joshua C.
• Granted Patent: US 9,150,771 B2
• Time in Patent Office: Days
• US Class Current: 277/590
• CPC Class Codes: B26D 7/08 Means for treating work or cutting member to facilitate cutting tensioning band cutters B26D1/48
• CPC Class Codes: B62D 7/08 the pivotal axes being situated in a single plane transverse to the longitudinal centre line of the vehicle
• CPC Class Codes: C09K 5/10 Liquid materials
• CPC Class Codes: C09K 5/14 Solid materials, e.g. powdery or granular
• CPC Class Codes: E21B 43/128 Adaptation of pump systems with down-hole electric drives
• CPC Class Codes: F16J 15/02 between relatively-stationary surfaces F16J15/46, F16J15/48 take precedence
• CPC Class Codes: Y10T 83/041 By heating or cooling

Abstract

In an embodiment is a seal including an elastomer; and boron nitride nanoparticles disposed in the elastomer, wherein the seal is thermally conductive and electrically insulating. In another embodiment, is a method of making a seal, the method includes compounding an elastomer with boron nitride nanoparticles to provide a composition; and molding the composition into a shape.

Claims

1. A seal comprising:

an elastomer; and

boron nitride nanoparticles disposed in the elastomer,

wherein the seal is thermally conductive and electrically insulating.

2. The seal of claim 1, wherein the electrical resistivity of the seal is greater than 1×

10¹² ohm-cm.

3. The seal of claim 1, wherein the dielectric strength of the seal is equal to or greater than 15 kV/cm.

4. The seal of claim 1, wherein the thermal conductivity of the seal is about 1 W/m K to about 3 W/m K.

6. The seal of claim 1, wherein the elastomer comprises polytetrafluoroethylene, nitrile-butyl rubber, hydrogenated nitrile-butyl rubber, fluoroelastomer rubber, organopolysiloxane, tetrafluoroethylene-propylene elastomeric copolymer, ethylene-propylene-diene monomer rubbers, polyvinylalcohol, or a combination comprising at least one of the foregoing.

7. The seal of claim 1 wherein the boron nitride is derivatized with a functional group.

8. The seal of claim 7, wherein the functional group is a alkyl group, hydroxyl group, or a combination comprising at least one of the foregoing.

9. The seal of claim 1, wherein the boron nitride is a nanotube, nanosphere, nanosheet, nanowire, nanorod, or a combination comprising at least one of the foregoing.

10. The seal of claim 9, wherein the boron nitride is the nanotube which has an aspect ratio of about 10 to about 400.

11. The seal of claim 9, wherein the boron nitride is the nanosphere which has a diameter of about 5 nm to about 800 nm.

12. The seal of claim 1, wherein the boron nitride comprises boron nitride nanotubes and boron nitride nanospheres.

13. The seal of claim 1 further comprising boron nitride microparticles.

14. The seal of claim 1 further comprising an additive nanoparticle including carbon nanotubes, fullerenes, nanodiamonds, graphene, polysilsesquioxanes, inorganic nanoparticles, nanoclays, or a combination comprising at least one of the foregoing.

15. The seal of claim 1, wherein the boron nitride is present in an amount of about 0.05 wt % to about 20 wt %, based on the weight of the seal.

16. The seal of claim 1 further comprising a fluid medium.

17. The seal of claim 16, wherein the fluid medium is included among the chains of the elastomer.

19. An article comprising the seal of claim 1.

20. The article of claim 19 wherein the article is a submersible pump, a valve, an O-ring, a T-ring, or a gasket.

22. The method of claim 20, further comprising adding a fluid medium to the composition.

23. The method of claim 20, further comprising crosslinking the elastomer.

21. A method of making a seal, the method comprising:

compounding an elastomer with boron nitride nanoparticles to provide a composition; and

molding the composition into a shape.