Products having sheets of 2D materials and related inks for direct ink writing

Patent metadata

Field	Value
Publication number	US-11976200-B2
Application number	US-201916771636-A
Country	US
Kind code	B2
Filing date	Jan 18, 2019
Priority date	Jan 19, 2018
Publication date	May 7, 2024
Grant date	May 7, 2024

Abstract

In one inventive concept, an ink includes a precursor of a graphene analogue, a thickener, and a solvent. In another inventive concept, an ink includes a graphene analogue, a thickener, and a solvent. In yet another inventive concept, an aerogel includes a three-dimensional printed structure having printed features comprised of two dimensional sheets of a graphene analogue.

First claim

What is claimed is:

1. An ink, comprising:
a precursor of a graphene analogue, wherein the precursor includes a graphene oxide in the form of single layer sheets;
a thickener;
a gelling agent; and
a solvent.

2. An ink as recited in claim 1 , wherein the precursor of the graphene analogue includes a precursor of a transition metal dichalcogenide.

3. An ink as recited in claim 1 , wherein the precursor of the graphene analogue includes graphene oxide.

4. An ink as recited in claim 3 , wherein the—single layer sheets have an average lateral dimension in a range of about 200 nm to about 800 nm.

5. An ink as recited in claim 1 , comprising a second graphene analogue.

6. An ink as recited in claim 5 , wherein the graphene analogue includes a transition metal dichalcogenide.

7. An ink as recited in claim 5 , wherein the graphene analogue includes a boron nitride.

8. An ink as recited in claim 1 , wherein the precursor of the graphene analogue is a composition comprising a graphene oxide and a precursor of a transition metal dichalcogenide.

9. An ink as recited in claim 1 , wherein a concentration of the precursor of the graphene analogue is about 1 wt % to about 60 wt % of total ink.

10. An ink as recited in claim 1 , wherein the thickener is a thixotropic agent.

11. An ink as recited in claim 1 , wherein the thickener is selected from the group consisting of: a surfactant, a cellulose derivative, and a carbon black material.

12. An ink as recited in claim 11 , wherein the thickener includes the cellulose derivative, wherein a concentration of the cellulose derivative is in a range of about 1 wt % to about 5 wt % of total ink.

13. An ink as recited in claim 11 , wherein the thickener includes the carbon black material, wherein a concentration of the carbon black material is in a range of about 5 wt % to about 20 wt % of total ink.

14. An ink as recited in claim 1 , wherein the gelling agent includes an ammonium carbonate solution.

15. An ink, comprising:
a graphene analogue;
a thickener comprising a cellulose derivative; and
a solvent, wherein the ink is configured to be extruded through a nozzle for forming a three-dimensional structure via deposition of a plurality of layers of the ink in sequence.

16. An ink as recited in claim 15 , wherein the graphene analogue is selected from the group consisting of: a transition metal dichalcogenide, boron nitride, and graphene.

17. An ink as recited in claim 11 , wherein the ink includes a combination of thickeners.

18. An ink as recited in claim 1 , wherein the ink is a co-gel suspension.

19. An ink as recited in claim 15 , wherein the ink includes a combination of thickeners.

20. An ink as recited in claim 15 , wherein the ink includes a co-gel suspension of graphene analogue@graphene oxide.

21. A method of forming an aerogel using the ink of claim 1 , the method comprising:
obtaining the ink
forming a three-dimensional structure by direct ink writing using the ink;
drying the formed three-dimensional structure; and
thermal annealing the dried three-dimensional structure.

22. A method as recited in claim 21 , the method further comprising:
before drying the formed three-dimensional structure, heating the three-dimensional structure for gelation of the three-dimensional structure; and
exchanging the solvent.

23. A method as recited in claim 21 , wherein forming the ink includes extruding the ink through a nozzle for forming a ligament that is about equal to a diameter of the nozzle, wherein the ink is configured such that the ligament formed therefore has sufficient viscosity to enable formation of the three-dimensional structure via deposition of a plurality of layers of the ink in sequence.

24. An ink as recited in claim 1 , wherein the thickener is a combination of a cellulose derivative and a carbon black material.

25. An ink as recited in claim 24 , wherein the cellulose derivative and a the carbon black material are present in an effective amount to cause the ink to have sufficient viscosity to enable extrusion of the ink through a nozzle for forming a ligament about equal to the diameter of the nozzle.

26. An ink as recited in claim 15 , wherein the ink is configured to be extruded through the nozzle for forming a ligament that is about equal to a diameter of the nozzle, wherein the ink is configured such that the ligament formed therefore has sufficient viscosity to enable formation of a three-dimensional structure via deposition of the plurality of layers of the ink in sequence.

27. An ink as recited in claim 15 , wherein the thickener is present in an effective amount to cause the ink to have sufficient viscosity to enable extrusion of the ink through the nozzle for forming a ligament about equal to the diameter of the nozzle.

28. An ink as recited in claim 15 , wherein the thickener includes a carbon black material.

29. An ink, comprising:
a precursor of a graphene analogue, wherein the precursor is a combination comprising a graphene oxide and a precursor of a second graphene analogue different than the graphene oxide, wherein the graphene oxide in the form of single layer sheets;
a thickener;
a gelling agent; and
a solvent.

Assignees

• L Livermore Nat Security Llc

Inventors

• Chandrasekaran Swetha
• Worsley Marcus A

Classifications

• C09D1/00 Primary

  Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances · CPC title

• C01B21/064

  with boron · CPC title

• C01B32/194

  After-treatment · CPC title

• C01B32/198

  Graphene oxide · CPC title

• C01G39/06 Primary

  Sulfides · CPC title