Nanoparticle compositions and methods for making and using the same

Patent metadata

Field	Value
Publication number	US-9499766-B2
Application number	US-201313921640-A
Country	US
Kind code	B2
Filing date	Jun 19, 2013
Priority date	Jan 12, 2006
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

A composition that includes solid lubricant nanoparticles and an organic medium is disclosed. Also disclosed are nanoparticles that include layered materials. A method of producing a nanoparticle by milling layered materials is provided. Also disclosed is a method of making a lubricant, the method including milling layered materials to form nanoparticles and incorporating the nanoparticles into a base to form a lubricant.

First claim

What is claimed is:

1. A composition comprising:
a plurality of nanoparticles having an average particle dimension of less than or equal to about 500 nm and an open architecture; and
an organic medium bonded to the nanoparticles, wherein the bonds comprise a bond type selected from the group consisting of a complex bond, an alloy bond, and a chemical bond, and wherein the nanoparticles are intercalated with the organic medium.

2. The composition of claim 1 , wherein the nanoparticles are intercalated and encapsulated with the organic medium.

3. The composition of claim 1 , wherein the nanoparticles are intercalated, encapsulated, and coated with the organic medium.

4. The composition of claim 1 , wherein nanoparticles have an average particle dimension of less than or equal to about 100 nm.

5. The composition of claim 1 , wherein nanoparticles have an average particle dimension of less than or equal to about 80 nm.

6. The composition of claim 1 , wherein nanoparticles have an average particle dimension of less than or equal to about 50 nm.

7. The composition of claim 1 , wherein the nanoparticles are selected from the group consisting of molybdenum disulfide nanoparticles, tungsten disulfide nanoparticles, boron nitride nanoparticles, graphite nanoparticles, copper nanoparticles, and combinations of any thereof.

8. The composition of claim 1 , wherein the nanoparticles comprise at least one layered material comprising a chalcogenide.

9. The composition of claim 1 , wherein the nanoparticles comprise molybdenum disulfide nanoparticles.

10. The composition of claim 1 , wherein the organic medium comprises at least one material selected from the group consisting of oil mediums, grease mediums, alcohol mediums, composite oil, canola oil, vegetable oil, soybean oil, corn oil, ethyl and methyl esters of rapeseed oil, distilled monoglycerides, monoglycerides, diglycerides, acetic acid esters of monoglycerides, organic acid esters of monoglycerides, sorbitan, sorbitan esters of fatty acids, propylene glycol esters of fatty acids, polyglycerol esters of fatty acids, hydrocarbon oils, n-hexadecane, phospholipids, dithiophosphates, and combinations of any thereof.

11. The composition of claim 1 , wherein the organic medium comprises an oil medium selected from the group consisting of composite oil, canola oil, vegetable oil, soybean oil, corn oil, hydrocarbon oil, and combinations of any thereof.

12. The composition of claim 1 , wherein the organic medium comprises a vegetable oil.

13. The composition of claim 1 , wherein the organic medium comprises canola oil.

14. The composition of claim 1 , wherein the organic material comprises a phospholipid.

15. The composition of claim 1 , wherein a weight ratio of nanoparticles to organic medium in the composition ranges from about 1:4 (0.25) to about 1:1.5 (0.67).

16. The composition of claim 1 , wherein a weight ratio of nanoparticles to organic medium in the composition ranges from about 1:3 (0.33) to about 1:1.5 (0.67).

17. The composition of claim 1 , further comprising a solid lubricant material selected from the group consisting of polytetrafluoroethylene, boron nitride, hexagonal boron nitride, soft metals, silver, lead, nickel, copper, cerium fluoride, zinc oxide, silver sulfate, cadmium iodide, lead iodide, barium fluoride, tin sulfide, zinc phosphate, zinc sulfide, mica, boron nitrate, borax, fluorinated carbon, zinc phosphide, boron, and combinations of any thereof.

18. The composition of claim 17 , wherein the solid lubricant material comprises nanoparticles having an average particle dimension of less than or equal to about 500 nm.

19. The composition of claim 17 , wherein the solid lubricant material comprises nanoparticles having an average particle dimension of less than or equal to about 100 nm.

20. The composition of claim 1 , further comprising a base material, wherein the nanoparticles are dispersed in the base material.

21. The composition of claim 20 , wherein the composition comprises from about 0.25% to about 5% nanoparticles by weight of the composition dispersed in the base material.

22. The composition of claim 20 , wherein the composition comprises from about 0.5% to about 3% nanoparticles by weight of the composition dispersed in the base material.

23. The composition of claim 20 , wherein the composition comprises from about 0.75% to about 2% nanoparticles by weight of the composition dispersed in the base material.

24. The composition of claim 20 , wherein the base material comprises at least one material selected from the group consisting of oil, grease, plastic, gel, wax, silicone, hydrocarbon oil, vegetable oil, corn oil, peanut oil, canola oil, soybean oil, mineral oil, paraffin oil, synthetic oil, petroleum gel, petroleum grease, hydrocarbon gel, hydrocarbon grease, lithium based grease, fluoroether based grease, ethylenebistearamide, and combinations of any thereof.

25. The composition of claim 20 , wherein the base material comprises at least one material selected from the group consisting of an oil, a grease, a plastic, a gel, a wax, a silicone, and combinations of any thereof.

26. The composition of claim 20 , wherein the base material comprises an oil or a grease.

27. The composition of claim 20 , wherein the base material comprises at least one material selected from the group consisting of mineral oil, paraffin oil, synthetic oil, petroleum grease, hydrocarbon grease, lithium based grease, and combinations of any thereof.

28. The composition of claim 1 , further comprising an emulsifier.

29. The composition of claim 28 , wherein the emulsifier comprises at least one material selected from the group consisting of lecithins, phospholipids, soy lecithins, detergents, distilled monoglycerides, monoglycerides, diglycerides, acetic acid esters of monoglycerides, organic acid esters of monoglycerides, sorbitan esters of fatty acids, propylene glycol esters of fatty acids, polyglycerol esters of fatty acids, compounds containing phosphorous, compounds containing sulfur, compounds containing nitrogen, and combinations of any thereof.

30. The composition of claim 28 , wherein the emulsifier comprises a compound containing phosphorous.

31. The composition of claim 28 , wherein the emulsifier comprises a phospholipid.

32. The composition of claim 28 , wherein the emulsifier comprises a lecithin.

33. The composition of claim 28 , wherein a weight ratio of organic medium to emulsifier in the composition ranges from about 1:1 (1) to about 1:0.4 (2.5).

34. The composition of claim 28 , wherein a weight ratio of organic medium to emulsifier in the composition ranges from about 1:1 (1) to about 1:0.5 (2).

35. The composition of claim 20 , further comprising an emulsifier.

36. The composition of claim 35 , wherein the composition comprises from about 0.5% to about 10% emulsifier by weight of the composition.

37. The composition of claim 35 , wherein the composition comprises from about 4% to about 8% emulsifier by weight of the composition.

38. The composition of claim 35 , wherein the composition comprises from about 5% to about 6% emulsifier by weight of the composition.

39. The composition

Assignees

• Univ Arkansas

Inventors

• Malshe Ajay P
• Verma Arpana

Classifications

• C10N2010/06

  Groups 3 or 13 · CPC title

• C10M125/22

  Compounds containing sulfur, selenium or tellurium · CPC title

• C10N2010/14

  Group 7 · CPC title

• C10M2207/0406

  used as base material · CPC title

• C10N2010/08

  Groups 4 or 14 · CPC title