Coatings containing functionalized graphene sheets and articles coated therewith
Coatings are provided containing functionalized graphene sheets and at least one binder. In one embodiment, the coatings are electrically conductive.
1. A coating, comprising functionalized graphene sheets and at least one binder,
wherein the functionalized graphene sheets have a carbon to oxygen ratio of at least about 50:1.
2. The coating of claim 1 , wherein the binder is a polymeric binder.
3. The coating of claim 1 , further comprising one or more carriers.
4. The coating of claim 1 , further comprising one or more dispersants.
5. The coating of claim 1 , wherein the coating has an electrical conductivity of at least about 10 −8 S/cm.
6. The coating of claim 1 , wherein the coating has an electrical conductivity of at least about 10 3 S/cm.
7. The coating of claim 1 , wherein the functionalized graphene sheets have a surface area of at least about 300 m 2 /g.
8. The coating of claim 1 , wherein the functionalized graphene sheets have a surface area of from about 400 to about 2400 m 2 /g.
9. The coating of claim 1 , further comprising at least one electrically conductive polymer.
10. The coating of claim 1 , further comprising at least one carbonaceous materials other than the functionalized graphene sheets.
11. A method for coating a substrate having a surface, comprising the step of applying a coating comprising functionalized graphene sheets and at least one binder to the surface, wherein the functionalized graphene sheets have a carbon to oxygen ratio of at least about 50:1.
12. The method of claim 11 , wherein the substrate comprises a polymeric material.
13. The method of claim 11 , wherein the substrate is a metal.
14. The method of claim 11 , wherein the substrate is a fabric, textile, or pulp product.
15. The method of claim 11 , wherein the coating has an electrical conductivity of at least about 10 −8 S/cm.
16. The method of claim 11 , wherein the coating has an electrical conductivity of at least about 10 3 S/cm.
17. The method of claim 11 , wherein the functionalized graphene sheets have a surface area of at least about 300 m 2 /g.
18. The method of claim 11 , wherein the functionalized graphene sheets have a surface area of from about 400 to about 2400 m 2 /g.
19. An article coated with a coating comprising functionalized graphene sheets having at least one binder, wherein the functionalized graphene sheets have a carbon to oxygen ratio of at least about 50:1.
20. The article of claim 19 in the form of an electrical or electronic component housing.
21. The article of claim 19 , wherein the coating has an electrical conductivity of at least about 10 −8 S/cm.
22. The article of claim 19 , wherein the coating has an electrical conductivity of at least about 10 3 S/cm.
23. The coating of claim 1 , wherein the functionalized graphene sheets have a carbon to oxygen ratio of at least about 100:1.
24. The method of claim 11 , wherein the coating has an electrical conductivity of at least about 10 2 S/cm.
25. The coating of claim 1 , wherein the binder is one or more polymers selected from the group consisting of poly(ethylene oxide)s, poly(propylene oxide)s, ethylene oxide/propylene oxide copolymers, cellulosic resins, ethyl cellulose, ethyl hydroxyethyl cellulose, carboxymethyl cellulose, cellulose acetate, cellulose acetate propionates, cellulose acetate butyrates, poly(vinyl butyral, polyvinyl alcohol, ethylene/vinyl acetate polymers, acrylic polymers and copolymers, styrene/acrylic copolymers, styrene/maleic anhydride copolymers, isobutylene/maleic anhydride copolymers, vinyl acetate/ethylene copolymers, ethylene/acrylic acid copolymers, polyolefins, polystyrenes, olefin and styrene copolymers, epoxy resins, acrylic latex polymers, polyester acrylate oligomers and polymers, polyesterdiol diacrylate polymers, UV-curable resins, and polyamides.