Compositions of coated diamond nanoparticles, methods of forming coated diamond nanoparticles, and methods of forming coatings

• US 10,167,392 B2
• Filed: 10/31/2014
• Issued: 01/01/2019
• Est. Priority Date: 10/31/2014
• Status: Active Grant

• Current Assignee: Baker Hughes Holdings LLC (Baker Hughes Company)
• Original Assignee: Baker Hughes Incorporated (Baker Hughes Company)
• Inventors: Suresh, Radhika, Falkner, Joshua C., Khabashesku, Valery N., Monteiro, Othon R., Agrawal, Devesh K.
• Primary Examiner(s): Gregorio, Guinever S
• Application Number:
  US14/530,205
• Publication Number:
  US 20160122551A1
• Time in Patent Office: 1,523 Days
• Field of Search: None
• CPC Class Codes: C09D 1/00 Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
• CPC Class Codes: C25D 13/02 with inorganic material

Abstract

In a composition including a plurality of coated diamond nanoparticles, each diamond nanoparticle may have at least one silane functional group covalently bonded to a surface thereof. A method of forming coated diamond nanoparticles may include functionalizing surfaces of diamond nanoparticles with at least one of a fluorine-containing compound and an oxidant; dispersing the functionalized diamond nanoparticles in a solvent comprising a silane functional group; and forming covalent bonds between the silane functional group and the diamond nanoparticles. A method of forming a diamond coating may include depositing the diamond nanoparticles over a substrate.

Claims

1. A composition, comprising:

a plurality of coated diamond nanoparticles dispersed in water, each diamond nanoparticle having at least one silane functional group covalently bonded directly to a surface thereof, the at least one silane functional group selected from the group consisting of halogen-substituted silanes and alkoxysilanes.

2. The composition of claim 1, wherein the composition is substantially free of surfactants.

3. The composition of claim 1, wherein the pH of the water is between 3 and 6.

4. A method, comprising:

functionalizing surfaces of diamond nanoparticles with at least one of a fluorine-containing compound and an oxidant;

dispersing the functionalized diamond nanoparticles in a solvent comprising a silane functional group selected from the group consisting of halogen-substituted silanes and alkoxysilanes;

forming covalent bonds directly between the silane functional group and the diamond nanoparticles to create coated diamond nanoparticles, each diamond nanoparticle having at least one silane functional group covalently bonded directly to a surface thereof, the at least one silane functional group selected from the group consisting of halogen-substituted silanes and alkoxysilanes; and

dispersing a plurality of the coated diamond nanoparticles in water.

5. The method of claim 4, wherein functionalizing surfaces of diamond nanoparticles comprises exposing the diamond nanoparticles to fluorine gas.

6. The method of claim 4, wherein functionalizing surfaces of diamond nanoparticles comprises oxidizing a surface of the diamond nanoparticles.

7. The method of claim 4, wherein dispersing the functionalized diamond nanoparticles in a solvent comprising a silane functional group selected from the group consisting of halogen-substituted silanes and alkoxysilanes comprises dispersing the functionalized diamond nanoparticles in a polar organic solvent.

8. The method of claim 4, wherein dispersing the functionalized diamond nanoparticles in a solvent comprising a silane functional group selected from the group consisting of halogen-substituted silanes and alkoxysilanes comprises dispersing the functionalized diamond nanoparticles in water.

9. The method of claim 4, wherein dispersing the functionalized diamond nanoparticles in a solvent comprising a silane functional group selected from the group consisting of halogen-substituted silanes and alkoxysilanes comprises dispersing the functionalized diamond nanoparticles in a solvent substantially free of surfactants.

10. The method of claim 4, further comprising heating the solvent comprising a silane functional group selected from the group consisting of halogen-substituted silanes and alkoxysilanes to a temperature from about 50°

C. to about 100°

C.

11. The method of claim 4, further comprising applying ultrasonic energy to the functionalized diamond nanoparticles and the solvent comprising a silane functional group selected from the group consisting of halogen-substituted silanes and alkoxysilanes to disperse the functionalized diamond nanoparticles in the solvent.

12. The method of claim 4, further comprising depositing at least one of the plurality of the coated diamond nanoparticles onto a substrate.

13. The method of claim 12, wherein depositing the at least one of the plurality of the coated diamond nanoparticles onto a substrate comprises electroless deposition onto the substrate of the at least one of the plurality of the coated diamond nanoparticles.

14. The method of claim 12, wherein depositing the at least one of the plurality of the coated diamond nanoparticles onto a substrate comprises electroplating onto the substrate the at least one of the plurality of the coated diamond nanoparticles.

15. A method of forming a diamond coating, comprising:

functionalizing surfaces of diamond nanoparticles with at least one of a fluorine-containing compound and an oxidant;

dispersing the functionalized diamond nanoparticles in a solvent comprising a silane functional group selected from the group consisting of halogen-substituted silanes and alkoxysilanes;

forming covalent bonds directly between the silane functional group and the diamond nanoparticles to create coated diamond nanoparticles, each diamond nanoparticle having at least one silane functional group covalently bonded directly to a surface thereof, the at least one silane functional group selected from the group consisting of halogen-substituted silanes and alkoxysilanes;

dispersing a plurality of the coated diamond nanoparticles in water; and

depositing the diamond nanoparticles over a substrate.

16. The method of claim 15, wherein depositing the diamond nanoparticles over a substrate comprises electroless deposition of the diamond nanoparticles.

17. The method of claim 15, wherein depositing the diamond nanoparticles over a substrate comprises electroplating the diamond nanoparticles over the substrate.

18. The method of claim 15, wherein depositing the diamond nanoparticles over a substrate comprises depositing the diamond nanoparticles over a substrate comprising a material selected from the group consisting of metals, alloys, polymers, ceramics, and glass.