Composite materials systems containing carbon and resin

Patent metadata

Field	Value
Publication number	US-10472497-B2
Application number	US-201916284764-A
Country	US
Kind code	B2
Filing date	Feb 25, 2019
Priority date	Feb 28, 2018
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

Abstract

Methods include producing a plurality of carbon particles in a plasma reactor, functionalizing the plurality of carbon particles in-situ in the plasma reactor to promote adhesion to a binder, and combining the plurality of carbon particles with the binder to form a composite material. The plurality of carbon particles comprises 3D graphene, where the 3D graphene comprises a pore matrix and graphene nanoplatelet sub-particles in the form of at least one of: single layer graphene, few layer graphene, or many layer graphene. Methods also include producing a plurality of carbon particles in a plasma reactor; functionalizing, in the plasma reactor, the plurality of carbon particles to promote chemical bonding with a resin; and combining, within the plasma reactor, the functionalized plurality of carbon particles with the resin to form a composite material.

First claim

What is claimed:

1. A method of producing a composite material, the method comprising:
producing a plurality of carbon particles in a plasma reactor, the plurality of carbon particles comprising 3D graphene, wherein the 3D graphene comprises a pore matrix and graphene nanoplatelet sub-particles that comprise at least one of: single layer graphene (SLG), few layer graphene (FLG), or many layer graphene (MLG);
functionalizing the plurality of carbon particles in-situ in the plasma reactor to promote adhesion to a binder; and
combining the plurality of carbon particles with the binder to form the composite material.

2. The method of claim 1 wherein the plurality of carbon particles has a phase purity of graphene nanoplatelets of greater than 99%.

3. The method of claim 1 wherein the producing comprises growing the graphene nanoplatelet sub-particles in an X-Y plane and in a Z direction, and wherein the graphene nanoplatelet sub-particles are connected to each other, forming the pore matrix.

4. The method of claim 3 wherein the graphene nanoplatelet sub-particles are connected to each other with carbon-carbon bonds in a plurality of locations comprising edge-to-edge, edge-to-basal plane and basal plane-to-basal plane locations.

5. The method of claim 1 wherein the pore matrix comprises at least one of: pores between the graphene nanoplatelet sub-particles or pores between layers of the FLG or MLG.

6. The method of claim 1 wherein the plasma reactor is a microwave plasma reactor; and
the method further comprises:
introducing a plurality of fibers into the microwave plasma reactor; and
modifying the plurality of fibers within a plasma or a high temperature plume of the microwave plasma reactor;
wherein the producing comprises growing the plurality of carbon particles on the modified plurality of fibers.

7. The method of claim 1 wherein the plasma reactor is a high frequency plasma reactor, wherein a high frequency of the high frequency plasma reactor is one of: radiofrequency (RF), very high frequency (VHF), ultra-high frequency (UHF), or microwave frequency.

8. The method of claim 1 wherein the plasma reactor is a microwave plasma reactor comprising:
i) a field-enhancing waveguide serving as a reaction chamber in which the plurality of carbon particles is produced, the field-enhancing waveguide having:
a field-enhancing zone having a decreasing cross-sectional area between a first cross-sectional area and a second cross-sectional area of the field-enhancing waveguide, wherein the second cross-sectional area is smaller than the first cross-sectional area; and
a reaction zone formed by the second cross-sectional area extending along a reaction length of the field-enhancing waveguide; and

ii) a microwave energy source that is coupled to the field-enhancing waveguide and provides microwave energy into the first cross-sectional area of the field-enhancing zone, wherein the microwave energy propagates in a direction along the reaction length of the reaction zone;
wherein the microwave plasma reactor is absent of a dielectric barrier between the field-enhancing zone and the reaction zone.

9. The method of claim 1 wherein the functionalizing is performed in a plasma of or a high temperature plume of the plasma reactor.

10. The method of claim 1 wherein:
the binder is a resin; and
the functionalizing comprises functionalizing the plurality of carbon particles to be compatible with the resin by promoting chemical bonding between the plurality of carbon particles and the resin.

11. The method of claim 1 wherein the plurality of carbon particles has an average starting particle size; and
the method further comprises adding energy to the composite material during the combining, wherein the energy causes the plurality of carbon particles to be reduced to an average final particle size that is less than the average starting particle size.

12. The method of claim 11 , wherein:
the producing of the plurality of carbon particles comprises engineering defects into intentional defect locations in the carbon particles; and
wherein the average final particle size is determined by the intentional defect locations.

13. A method of producing a composite material, the method comprising:
producing a plurality of carbon particles in a plasma reactor;
functionalizing, in the plasma reactor, the plurality of carbon particles to promote chemical bonding with a resin; and
combining, within the plasma reactor, the functionalized plurality of carbon particles with the resin to form the composite material.

14. The method of claim 13 wherein the functionalizing is performed in a plasma or a high temperature plume of the plasma reactor.

15. The method of claim 13 wherein the functionalizing comprises oxidation, nitridation, surface doping, surface alloying, or adding a hardening agent.

16. The method of claim 13 wherein the combining is performed in a plasma or a high temperature plume of the plasma reactor.

17. The method of claim 13 wherein the plasma reactor is a microwave plasma reactor; and
the method further comprises:
introducing a plurality of fibers into the microwave plasma reactor; and
modifying the plurality of fibers within a plasma or a thermal high temperature plume of the microwave plasma reactor;
wherein the producing comprises growing the plurality of carbon particles on the modified plurality of fibers.

18. The method of claim 13 wherein:
the plurality of carbon particles comprises 3D graphene;
the 3D graphene comprises a pore matrix and graphene nanoplatelet sub-particles that comprise at least one of: single layer graphene (SLG), few layer graphene (FLG), or many layer graphene (MLG); and
the producing comprises growing the graphene nanoplatelet sub-particles in an X-Y plane and in a Z direction, and wherein the graphene nanoplatelet sub-particles are connected to each other.

19. The method of claim 13 wherein the plurality of carbon particles has a phase purity of graphene nanoplatelets of greater than 99%.

20. The method of claim 13 wherein the plasma reactor is a microwave plasma reactor comprising:
i) a field-enhancing waveguide serving as a reaction chamber in which the plurality of carbon particles is produced, the field-enhancing waveguide having:
a field-enhancing zone having a decreasing cross-sectional area between a first cross-sectional area and a second cross-sectional area of the field-enhancing waveguide, wherein the second cross-sectional area is smaller than the first cross-sectional area; and
a reaction zone formed by the second cross-sectional area extending along a reaction length of the field-enhancing waveguide; and

ii) a microwave energy source that is coupled to the field-enhancing waveguide and provides microwave energy into the first cross-sectional area of the field-enhancing zone, wherein the microwave energy propagates in a direction along the reaction length of the reaction zone;
wherein the microwave plasma reactor is absent of a dielectric barrier between the field-enhancing zone and the reaction zone.

Assignees

• Lyten Inc

Inventors

• Stowell Michael W
• Anzelmo Bryce H
• Lanning Bruce
• Cook Daniel
• Singh Shreeyukta

Classifications

• C08K3/042

  Graphene or derivatives, e.g. graphene oxides · CPC title

• C01B2204/30

  Purity · CPC title

• C01B2204/04

  Specific amount of layers or specific thickness · CPC title

• C08K2201/011

  Nanostructured additives · CPC title

• C01B2204/02

  Single layer graphene · CPC title