Graphenic fibers, yarns, composites, and methods of making the same

Patent metadata

Field	Value
Publication number	US-12017961-B2
Application number	US-201816614263-A
Country	US
Kind code	B2
Filing date	May 16, 2018
Priority date	May 16, 2017
Publication date	Jun 25, 2024
Grant date	Jun 25, 2024

Abstract

Provided in certain embodiments are high performance graphene fibers and yarns, including components and precursors thereof, and composites comprising the same. Also provided herein are methods of manufacturing such fibers, yarns, composites, and components/precursors thereof.

First claim

What is claimed is:

1. A process for manufacturing a graphenic yarn, the process comprising:
providing a fluid stock, the fluid stock comprising a graphenic component and a first liquid medium;
electrostatically charging the fluid stock;
injecting the fluid stock into one or more second fluid medium, wherein the second fluid medium is a coagulation bath and the second fluid medium
flows in a direction away from the spinning nozzle; and,
bundling a plurality of fibers into a yarn.

2. The process of claim 1 , wherein the graphenic yarn comprises an aligned bundle of a plurality of fibers comprising one or more graphenic components and each fiber having a belt-like or a cylindrical structure, wherein the one or more graphenic components, having an average length and an average width with a first aspect ratio of length/width, are configured to roll or fold, and fuse to form a second aspect ratio of at least 100 within a fiber construct, wherein the second aspect ratio is at least 5 times of the first aspect ratio; and wherein the plurality of aligned bundle of fibers are substantially uniform in size and substantially continuous along the length of the fiber or yarn.

3. The process of claim 1 , wherein the fluid stock comprises a polymer.

4. The process of claim 1 , further comprising collecting a fiber web comprising the plurality of fibers on or in proximity to a collector prior to bundling the plurality of fibers into a yarn.

5. The process of claim 1 , wherein the second medium flows in a direction away from the nozzle such that the fibers are aligned and non-twisted in the bundle.

6. The process of claim 1 , further comprising thermally treating the plurality of fibers and/or yarn.

7. The process of claim 1 , further comprising removing or reducing non-graphenic components of the plurality of fibers or yarn.

Assignees

• Univ Cornell

Inventors

• Joo Yong Lak
• Fei Ling
• Kim Seung Wan

Classifications

• D01D5/0046

  the fibre formed by coagulation, i.e. wet electro-spinning · CPC title

• C04B2235/96

  Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance · CPC title

• C04B2235/5264

  characterised by the diameter of the fibers · CPC title

• C04B2235/526

  characterised by the length of the fibers · CPC title

• C04B2235/5248

  Carbon, e.g. graphite · CPC title