Methods for reshaping and bonding graphene oxide-based architectures

Patent metadata

Field	Value
Publication number	US-11911934-B2
Application number	US-201916963384-A
Country	US
Kind code	B2
Filing date	Jan 25, 2019
Priority date	Jan 25, 2018
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

Abstract

Methods for reshaping graphene oxide sheet-containing structures using water are provided. Graphene oxide sheet-containing structures can be reshaped by applying a force to a graphene oxide sheet-containing structure, wherein the force changes the initial shape of the structure to a new shape. While the force is still acting on the graphene oxide sheet-containing structure, liquid water is applied to the structure to dissipate stress induced by the force and the structure is then dried. When the force is removed, the graphene oxide sheet-containing structure remains fixed in the new shape.

First claim

What is claimed is:

1. A method of reshaping a structure comprising graphene oxide sheets, the method comprising:
applying an external force to the structure, wherein the external force changes the shape of the structure from a first shape to a second shape;
applying water to the structure while it has the second shape;
drying the structure; and
removing the external force, wherein the dried structure remains fixed in the second shape after the external force is removed.

2. The method of claim 1 , wherein the external force applied to the structure is a compressive force or a stretching force.

3. The method of claim 1 , wherein the structure comprising graphene oxide sheets is a graphene oxide paper.

4. The method of claim 3 , wherein the graphene oxide paper consists only of graphene oxide sheets.

5. The method of claim 3 , wherein the graphene oxide paper comprises particulate material dispersed within graphene oxide sheets.

6. The method of claim 1 , wherein the external force changes the shape of the structure from a planar shape to a non-planar shape.

7. The method of claim 1 , wherein changing the shape of the structure comprises bending the structure, coiling the structure, folding the structure, or a combination thereof.

8. The method of claim 1 , wherein the structure comprising graphene oxide sheets is a strip of graphene oxide paper and the step of applying an external force to the structure, wherein the external force changes the shape of the structure from a first shape to a second shape, comprises applying the graphene oxide paper around a mold such that the graphene oxide paper conforms to the shape of the mold.

9. The method of claim 1 , further comprising bonding the structure to a second structure comprising graphene oxide sheets by applying water to an interface between the structure and the second structure and drying the interface.

10. The method of claim 1 , further comprising reducing the graphene oxide sheets to convert them into graphene sheets.

11. The method of claim 1 , wherein the second shape is not dependents on the relative humidity.

12. The method of claim 1 , wherein the second shape is the shape of an antenna.

13. A method of bonding a first structure comprising graphene oxide sheets to a second structure comprising a co-dispersion of graphene oxide sheets and a particulate material, wherein the first structure is free of dispersed particulate material or comprises a co-dispersion of the graphene oxide sheets and a particulate material that is different from the particulate material of the second structure, the method comprising:
bringing the first structure and the second structure into contact in a contact area;
applying liquid water to the contact area; and
drying the first and second structures, whereby the first and second structures are bonded together.

14. The method of claim 13 , wherein the first structure comprises the co-dispersion of the graphene oxide sheets and the particulate material.

15. The method of claim 13 , wherein the particulate material of the second structure comprises a clay.

16. The method of claim 13 , wherein the particulate material of the second structure comprises carbon nanotubes.

Assignees

• Univ Northwestern

Inventors

• Luo Chong
• Huang Jiaxing

Classifications

• B29C43/184 Primary

  shaped by the compression of the material during moulding · CPC title

• B29C43/003

  characterised by the choice of material · CPC title

• C01B32/158

  Carbon nanotubes · CPC title

• C01B32/194

  After-treatment · CPC title

• C01B32/198

  Graphene oxide · CPC title