Compositions of matter and methods of producing a carbonized cloth for growth of graphene nano-petals

Patent metadata

Field	Value
Publication number	US-10329664-B2
Application number	US-201615007966-A
Country	US
Kind code	B2
Filing date	Jan 27, 2016
Priority date	Jan 27, 2015
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

Compositions of matter including a cloth base comprising one or more not fully carbon fibers woven together, where at least a portion of the not fully carbon fibers of the cloth base are carbonized and comprise graphene petals thereon. The not fully carbon fibers may be selected from a variety of materials including cellulose fibers such as hemp, linen, and/or cotton, and may also or alternatively include synthetic fibers such as polyester, Kevlar, and/or Rayon. A method for producing such a carbonized conductive fiber-based cloth is also provided, the method including carbonizing a cloth base comprising not fully carbon fibers in a plasma stream of a plasma process and growing graphene petals integrally on the carbonized cloth using the same plasma process.

First claim

The invention claimed is:

1. A method for growing graphene petals comprising:
providing a cloth base comprising fibers that are not fully carbon;
carbonizing the cloth base in a plasma stream of a plasma process; and
growing graphene petals integrally on the carbonized cloth base using the same plasma process.

2. The method of claim 1 , wherein the plasma process comprises a plasma-enhanced chemical vapor deposition process and the steps of carbonizing a cloth base and growing graphene petals occur simultaneously.

3. The method of claim 1 , wherein the plasma process is selected from the group consisting of a microwave plasma-enhanced chemical vapor deposition process, a radio frequency plasma-enhanced chemical vapor deposition process, a low pressure chemical vapor deposition process and a direct current arc discharge process.

4. The method of claim 1 , wherein the cloth base comprises one or more woven structures.

5. The method of claim 4 , wherein the cloth base comprises cellulose fibers.

6. The method of claim 4 , wherein the cloth base comprises synthetic fibers.

7. A method for growing graphene petals comprising:
using a fiber based cloth as a base material, the fiber based cloth comprising one or more fibers that are not fully carbon;
introducing the fiber based cloth into a plasma process chamber;
introducing at least one reactant gas into the plasma process chamber with a predetermined proportion of flow rates and pressure; and
enabling plasma with a power level at or between 500 to 5000 Watts to carbonize at least a surface of the not fully carbon fibers within the plasma process chamber such that graphene petals grow on the carbonized surface of the fibers.

8. The method of claim 7 , wherein the at least one reactant gas comprises a mixture of at least methane and hydrogen gases and the hydrogen gas contributes to passivate dangling bonds at edges of the graphene petals and enables the graphene petals to retain an open structure.

9. The method of claim 7 , wherein the at least one reactant gas comprises a mixture of at least methane and argon gases.

10. The method of claim 7 , wherein carbonization of the not fully carbon fibers and growth of graphene petals thereon occur within the same plasma process chamber.

11. The method of claim 7 , wherein the graphene petals grow integrally with the at least one carbonized surface of the fibers.

12. The method of claim 7 , wherein at least some of the fibers comprise synthetic fibers selected from a group consisting of polyester, Rayon, and Kevlar.

13. The method of claim 7 , wherein the step of enabling plasma with a predetermined power level to carbonize at least a surface of the fibers further comprises using a process selected from a group consisting of a plasma-enhanced chemical vapor deposition process, a microwave plasma-enhanced chemical vapor deposition process, a radio frequency plasma-enhanced chemical vapor deposition process, a low pressure chemical vapor deposition process, and a direct current arc discharge process.

14. The method of claim 7 , wherein the fiber based cloth retains some composition of the not fully carbon fibers following carbonization.

15. The method of claim 7 , wherein at least some of the not fully carbon fibers of the fiber based cloth comprise cellulose fibers selected from a group consisting of cotton, hemp, and linen.

16. A composition of matter comprising:
a cellulose cloth base comprising one or more fibers woven together;
wherein a first a portion of the cellulose cloth base is carbonized, has an electrical conductivity that is greater than an electrical conductivity of a non-carbonized cellulose cloth, and comprises graphene petals grown on one or more carbonized surfaces thereof; and
wherein a second portion of the cellulose cloth base is not fully carbonized.

17. The composition of matter of claim 16 , wherein:
each of the fibers of the first portion of the cellulose cloth base comprises at least one of the one or more carbonized surfaces;
the first portion of the cellulose cloth base comprises a first surface area; and
the graphene petals are vertically oriented on each of the one or more carbonized surfaces of the first portion of the cellulose cloth base, thereby providing a second electrically conductive surface area that is larger than the first surface area.

18. The composition of matter of claim 16 , wherein the one or more fibers of the cellulose cloth base comprises a plurality of fibers woven together to form one or more woven structures with at least one of such fibers of the second portion comprising a synthetic fiber.

19. The composition of matter of claim 16 , wherein the one or more fibers of the cellulose cloth base comprises a filament woven together to form one or more woven structures.

20. The composition of matter of claim 16 , wherein the graphene petals are integrally grown on the one or more carbonized surfaces of the first portion of the cellulose cloth base.

Assignees

• Purdue Research Foundation

Inventors

• Fisher Timothy
• Xiong Guoping

Classifications

• D06M11/74

  with carbon or graphite; with carbides; with graphitic acids or their salts · CPC title

• D06M10/06

  Inorganic compounds or elements · CPC title

• C23C16/50

  using electric discharges {(generation and control of plasma in discharge tubes for surface treatment H01J37/32, H01J37/34)} · CPC title

• C23C16/0245

  by etching with a plasma · CPC title

• C01B32/186

  by chemical vapour deposition [CVD] · CPC title