MATERIALS COMPRISING DEAGGREGATED DIAMOND NANOPARTICLES

• US 20110172132A1
• Filed: 01/12/2011
• Published: 07/14/2011
• Est. Priority Date: 01/12/2010
• Status: Active Grant

• Current Assignee: Vanderbilt University
• Original Assignee: Vanderbilt University
• Inventors: Davidson, Jim L., Branson, Blake T., Lukehart, Charles M.
• Granted Patent: US 8,703,665 B2
• Time in Patent Office: Days
• US Class Current: 508/126
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C08K 3/04 Carbon
• CPC Class Codes: C09K 5/10 Liquid materials
• CPC Class Codes: C09K 5/14 Solid materials, e.g. powdery or granular
• CPC Class Codes: C10M 103/02 Carbon; Graphite
• CPC Class Codes: C10M 125/02 Carbon; Graphite
• CPC Class Codes: C10M 2201/00 Inorganic compounds or elements as ingredients in lubricant compositions
• CPC Class Codes: C10M 2201/041 Carbon; Graphite; Carbon black
• CPC Class Codes: C10M 2203/1006 used as base material
• CPC Class Codes: C10M 2207/0225 used as base material
• CPC Class Codes: C10M 2229/0415 used as base material
• CPC Class Codes: C10N 2020/06 Particles of special shape or size
• CPC Class Codes: C10N 2030/06 Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• CPC Class Codes: C10N 2050/015 Dispersions of solid lubricants
• CPC Class Codes: C10N 2070/00 Specific manufacturing methods for lubricant compositions
• CPC Class Codes: Y10T 428/2982 Particulate matter [e.g., sphere, flake, etc.]

Abstract

Heat-transfer fluids and lubricating fluids comprising deaggregated diamond nanoparticles are described herein. Also described are composites comprising deaggregated diamond nanoparticles, and methods of making such composites. Method of using deaggregated diamond nanoparticles, for example, to improve the properties of materials such as thermal conductivity and lubricity are also disclosed.

Claims

1. A heat-transfer fluid comprising deaggregated diamond nanoparticles.

2. The heat-transfer fluid of claim 1, wherein the deaggregated diamond nanoparticles are oxidized.

3. The heat-transfer fluid of claim 1, further comprising at least one of ethylene glycol, mineral oil, dimethyl polysiloxane, a biphenol, a triphenol, or a combination thereof.

4. The heat-transfer fluid of claim 1, wherein the heat transfer fluid comprises greater than about 1% (wt/wt) deaggregated diamond nanoparticles.

5. The heat-transfer fluid of claim 3, wherein the heat transfer fluid comprises greater than about 3% (wt/wt) deaggregated diamond nanoparticles.

6. The heat-transfer fluid of claim 1, wherein the fluid is shelf-stable for at least about 30 days.

7. A lubricating fluid comprising deaggregated diamond nanoparticles.

8. The lubricating fluid of claim 7, wherein the deaggregated diamond nanoparticles are oxidized.

9. The lubricating fluid of claim 7, further comprising at least one of ethylene glycol, mineral oil, dimethyl polysiloxane, hydrocarbons, or a combination thereof.

10. The lubricating fluid of claim 7, comprising greater than about 1% (wt/wt) deaggregated diamond nanoparticles.

11. The lubricating fluid of claim 10, comprising greater than about 3% (wt/wt) deaggregated diamond nanoparticles.

12. The lubricating fluid of claim 7, wherein the fluid is shelf-stable for at least about 30 days.

13. A method of increasing the thermal conductivity of a fluid, comprising incorporating deaggregated diamond nanoparticles into the fluid.

14. The method of claim 13, wherein the deaggregated diamond nanoparticles are oxidized.

15. The method of claim 13, wherein the thermal conductivity is increased by at least about 1% compared to the same fluid without deaggregated diamond nanoparticles.

16. The method of claim 13, wherein the thermal conductivity is increased by at least about 5% compared to the same fluid without deaggregated diamond nanoparticles.

17. The method of claim 13, wherein the thermal conductivity is increased by at least about 10% compared to the same fluid without deaggregated diamond nanoparticles.

18. A method of increasing the lubricity of a fluid, comprising incorporating deaggregated diamond nanoparticles into the fluid.

19. The method of claim 18, wherein the deaggregated diamond nanoparticles are oxidized.

20. The method of claim 18, wherein the coefficient of friction of the fluid is reduced by at least about 10%.

21. The method of claim 18, wherein the wear rate of the fluid is reduced by at least about 5%.

22. The method of claim 18, wherein the seizure load of the fluid is increased by at least about 10%.

23. A composite comprising deaggregated diamond nanoparticles, the deaggregated diamond nanoparticles having an average particle size of less than about 10 nm.