Nano graphene-modified lubricant
First Claim
1. A lubricant composition having improved lubricant properties, comprising:
- (a) a lubricating fluid; and
(b) nano graphene platelets dispersed in said fluid, wherein said nano graphene platelets have a proportion of 0.001% to 75% by weight based on the total weight of the fluid and the graphene platelets combined.
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Abstract
A lubricant composition having improved lubricant properties, comprising:
(a) a lubricating fluid; and (b) nano graphene platelets (NGPs) dispersed in the fluid, wherein nano graphene platelets have a proportion of 0.001% to 60% by weight based on the total weight of the fluid and the graphene platelets combined. Preferably, the composition comprises at least a single-layer graphene sheet. Preferably, the lubricating fluid contains a petroleum oil or synthetic oil and a dispersant or surfactant. With the addition of a thickener or a desired amount of NGPs, the lubricant becomes a grease composition. Compared with graphite nano particle- or carbon nanotube-modified lubricants, NGP-modified lubricants have much better thermal conductivity, friction-reducing capability, anti-wear performance, and viscosity stability.
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Citations
35 Claims
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1. A lubricant composition having improved lubricant properties, comprising:
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(a) a lubricating fluid; and (b) nano graphene platelets dispersed in said fluid, wherein said nano graphene platelets have a proportion of 0.001% to 75% by weight based on the total weight of the fluid and the graphene platelets combined. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A lubricant composition with an enhanced thermal conductivity, comprising:
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A) an effective amount of a selected neat fluid having a selected thermal conductivity; B) an amount of from 0.001 to 60 percent by weight of nano graphene platelets dispersed into said selected neat fluid; and C) an effective amount of at least one dispersing agent dissolved or dispersed in said neat fluid. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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- 34. A lubricant composition having improved lubricant properties, comprising a lubricating fluid and at least a single-layer graphene sheet.
Specification