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Graphene-Based Threads, Fibers or Yarns with Nth-Order Layers and Twisting and Methods of Fabricating Same

a graphene-based, fiber-based technology, applied in the field of graphene-based threads or, can solve the problems of reducing strength, reducing the tensile strength of graphene flakes, and not making swcnts nor graphene flakes in practical macro-scale lengths, so as to enhance the strength of the overall multi-strand, the net tensile strength should be significantly greater

Inactive Publication Date: 2014-02-20
NTHDEGREE TECH WORLDWIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a method for making a graphene-based thread or fiber with nth-order layers, twisting, and chirality. The fiber is made by coating a starting strand with a plurality of aligned graphene flakes, then adding additional coatings of aligned graphene over the previous coating. The graphene flakes are in a polymer and may be wound or spun onto a substrate. The resulting fiber has a plurality of graphene ribbons with aligned and overlapping graphene flakes. The technical effect is the creation of a strong, flexible, and high-quality graphene-based thread or fiber with improved properties.

Problems solved by technology

However, neither SWCNTs nor graphene flakes have yet to be made in practical macro-scale lengths.
Furthermore, if many micron length SWCNTs or graphene flakes are assembled into a composite material, the strength is significantly diminished, e.g., by several orders of magnitude, due to poor load transfer efficiency between whatever matrix the carbon materials are housed in and the graphene flakes or SWCNTs themselves.
This limited interfacial strength between CNTs and their polymer matrix has been noted in scientific literature to be due to the atomically smooth surfaces of the CNTs allowing slippage between CNTs and matrix polymers due to the fact that there is no covalent bonding between the matrix and the CNTs.
While this potentially could be mitigated by chemically modifying the CNT in some way, such modifications are generally undesirable because such modification generally dramatically decreases CNT tensile strength due to tube defects derived from such treatment.

Method used

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  • Graphene-Based Threads, Fibers or Yarns with Nth-Order Layers and Twisting and Methods of Fabricating Same

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Embodiment Construction

[0045]While the present invention is susceptible of embodiment in many different forms, there are shown in the drawings and will be described herein in detail specific exemplary embodiments thereof, with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the invention to the specific embodiments illustrated. In this respect, before explaining at least one embodiment consistent with the present invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and to the arrangements of components set forth above and below, illustrated in the drawings, or as described in the examples. Methods and apparatuses consistent with the present invention are capable of other embodiments and of being practiced and carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein, as well as...

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Abstract

A representative embodiment includes a graphene-based fiber comprising: a starting strand; and a plurality of coatings of aligned graphene comprising: a first coating of aligned graphene axially offset at a first angle from an axis of the starting strand; a second coating of aligned graphene over the first coating and axially offset at a second angle from the axis of the starting strand; and at least one next coating of aligned graphene over a preceding coating and axially offset at a next angle from the axis of the starting strand. Another embodiment includes a plurality of intertwined and twisted graphene-based fibers. In various embodiments, the graphene may be graphene ribbons or carbon nanotubes or both. The graphene ribbon includes a plurality of aligned and overlapping graphene flakes in a polymer. Methods of fabrication are also disclosed.

Description

CROSS-REFERENCE TO A RELATED APPLICATION[0001]This application is a nonprovisional and conversion of and, under 35 U.S.C. Section 119, claims the benefit of and priority to U.S. Provisional Patent Application No. 61 / 683,101, filed Aug. 14, 2012, inventor William Johnstone Ray, entitled “Carbon Nanotube-Based Thread or Fiber with Nth-Order Multi-Tube Layers, Twisting and Chirality and Method of Fabricating Same”, which is commonly assigned herewith, the entire contents of which are incorporated herein by reference with the same full force and effect as if set forth in their entirety herein, and with priority claimed for all commonly disclosed subject matter.FIELD OF THE INVENTION[0002]The present invention in general is related to threads and fibers utilized to produce high tensile strength materials and, in particular, is related to a carbon nanotube and other graphene-based threads or fibers with nth-order layers, twisting and chirality and methods of fabricating carbon nanotube or...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D01F9/12D02G3/36
CPCD02G3/36D01F9/12B82Y30/00B82Y40/00D02G3/16D10B2101/122Y10T428/292
Inventor RAY, WILLIAM JOHNSTONELOWENTHAL, MARK DAVID
Owner NTHDEGREE TECH WORLDWIDE
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