Gelling nanofluids for dispersion stability

Patent metadata

Field	Value
Publication number	US-9840679-B2
Application number	US-201414774619-A
Country	US
Kind code	B2
Filing date	Mar 14, 2014
Priority date	Mar 14, 2013
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

A gelling nanofluid and methods for manufacture are provided. The composition and methods for manufacture produce nanofluid gels so that the settlement of nanoparticles in a base fluid is improved due to the inhibition of particle movement in the gel. The nanofluid gel is produced by using a gelling agent which is either coated on the nanoparticles prior to dispersion in the base fluid or directly introduced in the base fluid.

First claim

What is claimed is:

1. A nanofluid comprising:
a base fluid;
a nanoparticle component; and
a gelling agent provided in an amount effective to cause the nanofluid to change from a liquid state to a gelled state at temperatures below at least about 10° C., the gelled state helping to maintain the nanoparticle component suspended throughout the base fluid, wherein the gelling agent is selected from the group consisting of sodium oleate, alginic acid, sodium linoleate, and mixtures thereof.

2. A nanofluid comprising:
a base fluid;
a nanoparticle component; and
a gelling agent provided in an amount effective to cause the nanofluid to change from a liquid state to a gelled state at temperatures below at least about 10° C., the gelled state helping to maintain the nanoparticle component suspended throughout the base fluid, wherein the nanoparticle component is selected from the group consisting of diamond nanoparticles, MoS 2 nanoparticles, WS 2 , and combinations thereof.

3. The nanofluid of claim 1 wherein the base fluid is a polar fluid.

4. The nanofluid of claim 3 wherein the base fluid is selected from the group consisting of water, long chain alcohol-base machining lubricant, oil-in-water emulsions, and mixtures thereof.

5. A nanofluid comprising:
a base fluid;
a nanoparticle component; and
a gelling agent provided in an amount effective to cause the nanofluid to change from a liquid state to a gelled state at temperatures below at least about 10° C., the gelled state helping to maintain the nanoparticle component suspended throughout the base fluid, wherein the base fluid is a long chain alcohol-based machining lubricant.

6. The nanofluid of claim 1 wherein the gelling agent is provided in a range of about 0.2 to about 2.0 wt. %.

7. The nanofluid of claim 1 wherein the gelling agent is sodium oleate.

8. The nanofluid of claim 1 wherein the gelling agent is provided in an amount effective to cause the nanofluid to change from a liquid state to a gelled state at temperatures below at least about 20° C.

9. A method of preparing a gelling nanofluid, the method comprising the steps of:
coating a first nanoparticle component with a gelling agent to form coated nanoparticles; and
combining the coated nanoparticles with a base fluid to form the gelling nanofluid, the gelling agent provided in an amount effective to cause the nanofluid to change from a liquid state to a gelled state at temperatures below at least about 10° C., the gelled state helping to maintain the nanoparticle component suspended throughout the base fluid.

10. The method of claim 9 wherein the base fluid is a polar fluid.

11. The method of claim 10 wherein the base fluid is selected from the group consisting of water, long chain alcohol-base machining lubricant, oil-in-water emulsions, and mixtures thereof.

12. The method of claim 9 wherein the gelling agent is provided in a range of about 0.2 to about 2.0 wt. %.

13. The method of claim 9 wherein the gelling agent is selected from the group consisting of sodium oleate, alginic acid, sodium linoleate, and mixtures thereof.

14. The method of claim 13 wherein the gelling agent is sodium oleate.

15. The method of claim 9 wherein the gelling agent is provided in an amount effective to cause the nanofluid to change from a liquid state to a gelled state at temperatures below at least about 20° C.

16. A method of preparing a gelling nanofluid, the method comprising the steps of:
combining a base fluid with a first nanoparticle component and a gelling agent to form a gelling nanofluid; and
cooling the gelling nanofluid to a temperature of less than about 20° C., the gelling agent provided in an amount effective to cause the nanofluid to change from a liquid state to a gelled state at temperatures below at least about 10° C., the gelled state helping to maintain the nanoparticle component suspended throughout the base fluid.

17. The method of claim 16 wherein the base fluid is a polar fluid.

18. The method of claim 17 wherein the base fluid is selected from the group consisting of water, long chain alcohol-base machining lubricant, oil-in-water emulsions, and mixtures thereof.

19. The method of claim 16 wherein the gelling agent is provided in a range of about 0.2 to about 2.0 wt. %.

20. The method of claim 16 wherein the gelling agent is selected from the group consisting of sodium oleate, alginic acid, sodium linoleate, and mixtures thereof.

21. The method of claim 16 wherein the gelling agent is provided in an amount effective to cause the nanofluid to change from a liquid state to a gelled state at temperatures below at least about 20° C.

22. The nanofluid of claim 1 wherein the base fluid is a non-aqueous fluid having a moisture content less than about 20%.

Assignees

• Univ Howard

Inventors

• Mosleh Mohsen
• Ghaderi-Yeganeh Mohammad

Classifications

• C10M2201/065

  Sulfides; Selenides; Tellurides · CPC title

• C10M173/00

  Lubricating compositions containing more than 10% water · CPC title

• C10M2201/066

  Molybdenum sulfide · CPC title

• C10M177/00

  Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes · CPC title

• C10M2207/126

  monocarboxylic · CPC title