Patent
US 8,222,190Nano Graphene-Modified Lubricant
Aruna Zhamu
US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 8,222,190Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 Schematic of conventional processes for producing oxidized NGPs (also referred to as graphite oxide nano platelets).
FIG. 2 Schematic of the direct ultrasonication process by which a pristine graphite material, without pre-intercalation or pre-oxidation (without exposing to …
FIG. 3 Complex viscosity values of lubricants containing either NGPs or CNTs are plotted as a function of the frequency, equivalent to a shear rate.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
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 5 proportion of 0.001% to 75% by weight based on the total weight of the fluid and the graphene platelets combined.
The lubricant composition as recited in claim 1, further comprising a surfactant or dispersant.
3. The lubricant composition as recited in claim 1, wherein said nano graphene platelets have an average thickness less than 10 nm.
8. A lubricant composition with an enhanced thermal conductivity, comprising: 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.
30 9. The lubricant composition of claim 8, wherein the neat fluid is selected from the group consisting of petroleum distillates, synthetic petroleum oils, greases, gels, oil-soluble polymer composition, vegetable oils, and combinations thereof.
30 31. The lubricant composition of claim 8, wherein said dispersing agent is selected from the group consisting of an lipophilic hydrocarbon group, and a polar functional hydrophilic group consisting of the class of carboxylate, ester, amine, amide, imine, imide, hydroxyl, ether, epoxide, phosphorus, ester carboxyl, anhydride, or nitrile.
Materials described outside the worked examples.
lubricating fluid
nano graphene platelets
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
thermal conductivity of base lubricating oils (background/prior art) | — | petroleum oil or synthetic oil |
Thickness | ≤ 500 nm |
Patent
Atlas literature
Patent
US 8,222,190Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 Schematic of conventional processes for producing oxidized NGPs (also referred to as graphite oxide nano platelets).
FIG. 2 Schematic of the direct ultrasonication process by which a pristine graphite material, without pre-intercalation or pre-oxidation (without exposing to …
FIG. 3 Complex viscosity values of lubricants containing either NGPs or CNTs are plotted as a function of the frequency, equivalent to a shear rate.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
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 5 proportion of 0.001% to 75% by weight based on the total weight of the fluid and the graphene platelets combined.
The lubricant composition as recited in claim 1, further comprising a surfactant or dispersant.
3. The lubricant composition as recited in claim 1, wherein said nano graphene platelets have an average thickness less than 10 nm.
8. A lubricant composition with an enhanced thermal conductivity, comprising: 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.
30 9. The lubricant composition of claim 8, wherein the neat fluid is selected from the group consisting of petroleum distillates, synthetic petroleum oils, greases, gels, oil-soluble polymer composition, vegetable oils, and combinations thereof.
30 31. The lubricant composition of claim 8, wherein said dispersing agent is selected from the group consisting of an lipophilic hydrocarbon group, and a polar functional hydrophilic group consisting of the class of carboxylate, ester, amine, amide, imine, imide, hydroxyl, ether, epoxide, phosphorus, ester carboxyl, anhydride, or nitrile.
Materials described outside the worked examples.
lubricating fluid
nano graphene platelets
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
thermal conductivity of base lubricating oils (background/prior art) | — | petroleum oil or synthetic oil |
Thickness | ≤ 500 nm |
Patent
Atlas literature
Patent
US 8,222,190Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 Schematic of conventional processes for producing oxidized NGPs (also referred to as graphite oxide nano platelets).
FIG. 2 Schematic of the direct ultrasonication process by which a pristine graphite material, without pre-intercalation or pre-oxidation (without exposing to …
FIG. 3 Complex viscosity values of lubricants containing either NGPs or CNTs are plotted as a function of the frequency, equivalent to a shear rate.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
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 5 proportion of 0.001% to 75% by weight based on the total weight of the fluid and the graphene platelets combined.
The lubricant composition as recited in claim 1, further comprising a surfactant or dispersant.
3. The lubricant composition as recited in claim 1, wherein said nano graphene platelets have an average thickness less than 10 nm.
8. A lubricant composition with an enhanced thermal conductivity, comprising: 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.
30 9. The lubricant composition of claim 8, wherein the neat fluid is selected from the group consisting of petroleum distillates, synthetic petroleum oils, greases, gels, oil-soluble polymer composition, vegetable oils, and combinations thereof.
30 31. The lubricant composition of claim 8, wherein said dispersing agent is selected from the group consisting of an lipophilic hydrocarbon group, and a polar functional hydrophilic group consisting of the class of carboxylate, ester, amine, amide, imine, imide, hydroxyl, ether, epoxide, phosphorus, ester carboxyl, anhydride, or nitrile.
Materials described outside the worked examples.
lubricating fluid
nano graphene platelets
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
thermal conductivity of base lubricating oils (background/prior art) | — | petroleum oil or synthetic oil |
Thickness | ≤ 500 nm |
Patent
Atlas literature
Patent
US 8,222,190Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 Schematic of conventional processes for producing oxidized NGPs (also referred to as graphite oxide nano platelets).
FIG. 2 Schematic of the direct ultrasonication process by which a pristine graphite material, without pre-intercalation or pre-oxidation (without exposing to …
FIG. 3 Complex viscosity values of lubricants containing either NGPs or CNTs are plotted as a function of the frequency, equivalent to a shear rate.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
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 5 proportion of 0.001% to 75% by weight based on the total weight of the fluid and the graphene platelets combined.
The lubricant composition as recited in claim 1, further comprising a surfactant or dispersant.
3. The lubricant composition as recited in claim 1, wherein said nano graphene platelets have an average thickness less than 10 nm.
8. A lubricant composition with an enhanced thermal conductivity, comprising: 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.
30 9. The lubricant composition of claim 8, wherein the neat fluid is selected from the group consisting of petroleum distillates, synthetic petroleum oils, greases, gels, oil-soluble polymer composition, vegetable oils, and combinations thereof.
30 31. The lubricant composition of claim 8, wherein said dispersing agent is selected from the group consisting of an lipophilic hydrocarbon group, and a polar functional hydrophilic group consisting of the class of carboxylate, ester, amine, amide, imine, imide, hydroxyl, ether, epoxide, phosphorus, ester carboxyl, anhydride, or nitrile.
Materials described outside the worked examples.
lubricating fluid
nano graphene platelets
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
thermal conductivity of base lubricating oils (background/prior art) | — | petroleum oil or synthetic oil |
Thickness | ≤ 500 nm |
surfactant or dispersant
dispersing agent
single-layer graphene
petroleum oil or synthetic oil
| — |
Thickness | ≤ 0.34 nm | — |
Thickness | ≤ 10 nm | — |
Thickness | ≤ 1 nm | — |
Thickness | ≤ 30 nm | — |
— | ≤ 500 W | — |
— | ≤ 1 W | — |
— | ≥ 3000 W | — |
— | ≥ 1 W | — |
— | ≥ 10 W | — |
— | ≥ 30 W | — |
surfactant or dispersant
dispersing agent
single-layer graphene
petroleum oil or synthetic oil
| — |
Thickness | ≤ 0.34 nm | — |
Thickness | ≤ 10 nm | — |
Thickness | ≤ 1 nm | — |
Thickness | ≤ 30 nm | — |
— | ≤ 500 W | — |
— | ≤ 1 W | — |
— | ≥ 3000 W | — |
— | ≥ 1 W | — |
— | ≥ 10 W | — |
— | ≥ 30 W | — |
surfactant or dispersant
dispersing agent
single-layer graphene
petroleum oil or synthetic oil
| — |
Thickness | ≤ 0.34 nm | — |
Thickness | ≤ 10 nm | — |
Thickness | ≤ 1 nm | — |
Thickness | ≤ 30 nm | — |
— | ≤ 500 W | — |
— | ≤ 1 W | — |
— | ≥ 3000 W | — |
— | ≥ 1 W | — |
— | ≥ 10 W | — |
— | ≥ 30 W | — |
surfactant or dispersant
dispersing agent
single-layer graphene
petroleum oil or synthetic oil
| — |
Thickness | ≤ 0.34 nm | — |
Thickness | ≤ 10 nm | — |
Thickness | ≤ 1 nm | — |
Thickness | ≤ 30 nm | — |
— | ≤ 500 W | — |
— | ≤ 1 W | — |
— | ≥ 3000 W | — |
— | ≥ 1 W | — |
— | ≥ 10 W | — |
— | ≥ 30 W | — |