Altering sedimentation mechanisms in carbon-based nano-lubricants
AssigneeKuwait University
InventorsNaser Alsayegh, Ammar M. Bahman
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Abstract
Methods of making improved nanolubricants are providing including dispersing carbon nanoparticles selected from the group consisting of graphene (GN), single-walled carbon nanotubes (SWCNTs), and multi-walled carbon nanotubes (MWCNTs) in a base fluid, such as POE. The carbon nanoparticles are dispersed by adding the carbon nanoparticles to the base fluid to obtain a mixture and mixing the mixture for about 5 minutes using a magnetic stirrer to obtain a suspension. The resulting suspension is then further dispersed using a bath ultrasonicator for about 60 minutes starting at about 25° C. The temperature may be varied up to about 49° C. and back down to about 25° C. over the course of the 60-minute period.
Claims16
A method of altering the sedimentation mechanism of a carbon-based nanolubricant, the method comprising:
- adding carbon nanoparticles to a base fluid to obtain a mixture;
- mixing the mixture for about 5 minutes using a magnetic stirrer to obtain a suspension;
- and
- dispersing the suspension using a bath ultrasonicator for about 60 minutes to obtain the nanolubricant, wherein the bath ultrasonicator comprises a water bath at a temperature of about 25° C.;
- wherein the carbon nanoparticles are selected from the group consisting of graphene (GN), single-walled carbon nanotubes (SWCNTs), and multi-walled carbon nanotubes (MWCNTs).
A method of altering the sedimentation mechanism of a carbon-based nanolubricant, the method comprising:
- adding multi-walled carbon nanotubes (MWCNTs) to a poly olester oil to obtain a mixture;
- mixing the mixture for about 5 minutes using a magnetic stirrer to obtain a suspension;
- and
- dispersing the suspension using a bath ultrasonicator for about 60 minutes to obtain the nanolubricant, wherein the bath ultrasonicator comprises a water bath starting at a temperature of about 25° C.;
- and
- varying the bath ultrasonicator water bath temperature by first increasing the temperature at a rate of about 1° C. per 1.25 min until the water bath temperature reaches about 49° C., then decreasing the water bath temperature at rate of about 1° C. per 1.25 min until the water bath temperature reaches about 25° C.
Dependencies are inferred from the claim text.