US20150004392A1 - Whisker-reinforced hybrid fiber by method of base material infusion into whisker yarn - Google Patents
Whisker-reinforced hybrid fiber by method of base material infusion into whisker yarn Download PDFInfo
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- US20150004392A1 US20150004392A1 US13/930,637 US201313930637A US2015004392A1 US 20150004392 A1 US20150004392 A1 US 20150004392A1 US 201313930637 A US201313930637 A US 201313930637A US 2015004392 A1 US2015004392 A1 US 2015004392A1
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/36—Cored or coated yarns or threads
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/12—General methods of coating; Devices therefor
- C03C25/16—Dipping
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/12—General methods of coating; Devices therefor
- C03C25/18—Extrusion
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
- C03C25/26—Macromolecular compounds or prepolymers
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/42—Coatings containing inorganic materials
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/628—Coating the powders or the macroscopic reinforcing agents
- C04B35/62844—Coating fibres
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5022—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with vitreous materials
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/16—Yarns or threads made from mineral substances
- D02G3/18—Yarns or threads made from mineral substances from glass or the like
- D02G3/182—Yarns or threads made from mineral substances from glass or the like the glass being present only in part of the structure
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/40—Yarns in which fibres are united by adhesives; Impregnated yarns or threads
- D02G3/404—Yarns or threads coated with polymeric solutions
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5216—Inorganic
- C04B2235/524—Non-oxidic, e.g. borides, carbides, silicides or nitrides
- C04B2235/5244—Silicon carbide
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5252—Fibers having a specific pre-form
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5268—Orientation of the fibers
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5284—Hollow fibers, e.g. nanotubes
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5284—Hollow fibers, e.g. nanotubes
- C04B2235/5288—Carbon nanotubes
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2101/00—Inorganic fibres
- D10B2101/10—Inorganic fibres based on non-oxides other than metals
- D10B2101/12—Carbon; Pitch
- D10B2101/122—Nanocarbons
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2918—Rod, strand, filament or fiber including free carbon or carbide or therewith [not as steel]
Definitions
- the present invention pertains to a hybrid fiber consisting of a conventional polymer or glass fiber that is reinforced with fibrils distributed throughout the fiber. More specifically, the invention pertains to a hybrid fiber consisting of a polymer or glass that is reinforced by fibrils woven into a yarn that extends through the hybrid fiber interior and is coated and infused with the polymer or glass.
- FIG. 2 is a schematic representation of a portion of the yarn length of interwoven nanotubes.
- FIG. 3 is a schematic representation of a portion of the length of the hybrid fiber.
- FIG. 4 is a schematic representation of a method of producing the hybrid fiber.
- FIG. 1 is a representation of a basic embodiment of a hybrid fiber.
- FIG. 1 shows a hybrid fiber of glass base material that is fibril reinforced by a plurality of isolated fibrils.
- a plurality of individual isolated fibrils 20 is distributed throughout the base material 12 .
- the fibrils 20 can be small filaments, nanotubes such as carbon nanotubes, boron nitride nantotubes, whiskers such as silicon carbide or others.
- the fibrils 20 are primarily distributed through the interior 22 of the hybrid fiber 10 , but some of the fibrils 20 could also be distributed along and around the fiber exterior surface 14 .
- the plurality of fibrils 20 each have a length that is substantially aligned with the length or axis 16 of the hybrid fiber 10 .
- the fibrils 20 are materials that have better properties, such as tensile strength, compressive strength, elastic modulus (mechanical stiffness), electrical conductivity, and dielectric coefficient, among others, than the base material 12 of the hybrid fiber 10 .
- the materials of the fibrils 20 cannot be grown in the length or size desired for the fibrils 20 to be used in a fiber composite.
- An example of such a material of the fibrils 20 is a nanotube.
- the fibrils 20 are carbon nanotubes, either single wall or multi wall. The longest carbon nanotubes that have been made to date are of the order of a centimeter in length, whereas the fibers used in most fiber composites are continuous.
- the basic technology for spinning short lengths of filaments into a longer length of yarn has been known for some time in the textile industry.
- the length of a piece of yarn can be greater than the lengths of any individual filament woven into and composing the yarn.
- this basic technology is employed to create yarns from very small diameter fibrils, such as carbon nanotubes.
- the yarn 26 passes from a supply reel 42 through a nozzle 44 and into the interior of a container 46 that contains a molten bath of continuous phase base material 32 .
- a heater 48 controls the temperature of the bath of base material 32 .
- the yarn 26 is infused by the continuous phase base material 32 , which wets the fibrils or nanotubes 28 composing the yarn 26 .
- the fibrils or nanotubes 28 in the yarn 26 and the infused base material 32 pass through an optional ring 50 .
- the ring 50 scrapes off any excess continuous phase base material 32 .
- the fibrils or nanotubes 28 and the infused base material 32 are then allowed to cool below the solidification temperature of the base material 32 and to solidify. This forms the hybrid fiber 34 .
- FIG. 5 is a representation of a further method of making the hybrid fiber 34 of the invention.
- the fibril or nanotube 28 reinforcement of the hybrid fiber 34 consists of a single yarn 26 formed from a plurality of the nanotubes.
- the yarn 26 is pulled over a surface of a heated roller and “molten” continuous phase base material 32 is poured onto the roller and is infused into the yarn.
- “molten” it is intended that the base material 32 be flowable like a liquid, although it may have a high viscosity. It is therefore intended that the base material 32 described with reference to FIG. 5 cover any type of known base material including glass, thermoset base materials and thermoplastic base materials.
- the yarn 26 leaves a supply reel 58 and travels over part of a cylindrical exterior surface 60 of a combining wheel 62 which is rotating in a clockwise direction as viewed in FIG. 5 .
- a container 64 holding the molten base material 32 is positioned above the combining wheel exterior surface 60 .
- the container 64 has a spout 66 that extends downwardly from the container to a nozzle 68 at the distal end of the spout.
- the nozzle 68 is positioned just above the combining wheel exterior surface 60 and a portion 72 of the yarn on the surface.
- the molten base material 32 passes through the spout 66 and the nozzle 68 and drops onto the portion of yarn 72 on the combining wheel exterior surface 60 .
- the base material 32 dropped onto the portion of yarn 72 coats the portion of yarn and is infused into the plurality of fibrils or nanotubes 28 that form the yarn.
- the combining wheel 62 may be heated to prevent the base material dropped onto the portion of the yarn 72 from beginning to solidify until the portion of yarn 72 coated and infused with the base material leaves the combining wheel exterior surface 60 .
- the supply reel 58 and the take up reel 78 rotate synchronously so that the yarn travels at a constant speed throughout the process.
- CVD chemical vapor deposition
- PVD physical vapor deposition
Abstract
A hybrid fiber consists of a continuous phase base material that permeates the length of the hybrid fiber and a plurality of fibrils or nanotubes that are dispersed throughout the hybrid fiber interior in the form of a yarn woven from the plurality of fibrils or nanotubes. The method of making the hybrid fiber involves coating the yarn with the continuous phase base material and infusing the continuous phase base material into the plurality of fibrils or nanotubes that form the yarn.
Description
- The present invention pertains to a hybrid fiber consisting of a conventional polymer or glass fiber that is reinforced with fibrils distributed throughout the fiber. More specifically, the invention pertains to a hybrid fiber consisting of a polymer or glass that is reinforced by fibrils woven into a yarn that extends through the hybrid fiber interior and is coated and infused with the polymer or glass.
- Glass fibers, graphite fibers, silicon carbide fibers, and polymer fibers, among others, are used extensively in modern fiber composites. These composites have been used in a variety of different products, for example building materials such as deck planking and rails, in sporting goods such as golf clubs, and in structural components of automobiles and aircraft such as, for example, body panels and rotor blades.
- The composite is generally formed by placing a plurality of the fibers in a liquefied polymer base material such as a thermoset or a thermoplastic. The polymer base material is then caused to solidify. The plurality of fibers reinforce the solidified polymer base material. Other potential base materials that are reinforced by fibers include glass, ceramic, and metals.
- The placement of the plurality of fibers in the liquefied base materials can be in the form of layers of the fibers with the fibers in each layer being arranged in a uniaxial direction or substantially parallel, or layers of fibers with the fibers in each layer being formed by a weave geometry of the fibers.
- Examples of thermoset base materials that are reinforced with fibers include polyester, vinylester, epoxy, bismalemide, polyimide, phenolicester and cyanateester. Examples of thermoplastic base materials that are reinforced with fibers include polycarbonate, polyphenylene sulfide, polyether-etherketone, polyether-ketone-ketone, and polyetherimide.
- In general, there is evidence that incorporation of reinforcing fibers into a glass base material can provide both increases in tensile strength and elastic modulus. This is disclosed in the Brennan U.S. Pat. No. 4,314,852, incorporated herein by reference.
- However, fibers, composed of a single material, have limited properties. Sometimes a second material is employed as a reinforcement on the outside of the fiber material. This method however results in limited improvement of desired fiber properties. Placing reinforcement inside of the fiber material has resulted in a small percentage of the fiber interior being occupied by the reinforcement and a minimal alignment of the reinforcement in a desired direction, for example along the fiber axis.
- The present invention provides a single base material fiber with reinforcement where the reinforcement is distributed throughout the interior of the fiber and is primarily aligned with the axis or length of the fiber. The present invention also provides a fiber having a high percentage of the fiber interior volume being occupied by the reinforcement within the fiber.
- The present invention overcomes disadvantages associated with composite base material reinforced with fibers by providing a hybrid fiber to be used in reinforcing a composite base material where the hybrid fiber construction and the method of making the hybrid fiber are unique.
- The hybrid fiber is basically comprised of a pure base material that permeates a length of the hybrid fiber. In a preferred embodiment the base material is glass. Alternative material could be polymer.
- A plurality of fibrils or nanotubes are distributed throughout the base material. The nanotubes are interwoven into a yarn that extends the length of the hybrid fiber. Each nanotube has a length that is aligned with the length of the hybrid fiber. The length of each nanotube is a fraction of the length of the hybrid fiber. In a preferred embodiment the nanotubes are carbon nanotubes. Additionally, in the preferred embodiment the volume percentage of the plurality of nanotubes in the hybrid fiber is in a range of 10% to 90%, and preferably 30% to 80%.
- The method of making the hybrid fiber involves aligning and overlapping a plurality of the nanotubes forming a continuous strand or yarn of the nanotubes having a strand length. In the strand of nanotubes, each nanotube of the plurality of nanotubes has a length that is aligned with the strand length and is a fraction of the strand length. In a preferred embodiment the plurality of nanotubes are twisted or woven into a length of yarn.
- The strand or yarn length is then successively coated with a flowable base material that infuses into the plurality of nanotubes of the strand or yarn.
- The coating of the strand or yarn length with the liquid base material can be accomplished by containing the liquid base material in a container having a nozzle opening, and then pulling the strand or yarn through the nozzle opening and into the liquid base material in the container. Pulling the strand or yarn through the liquid base material successively coats the strand or yarn with the liquid base material and infuses the liquid base material into the plurality of nanotubes forming the strand or yarn.
- Alternatively, the strand or yarn could be pulled over a rotating cylindrical surface while pouring the liquid base material onto the surface and the strand or yarn. This successively coats the strand or yarn length with the liquid base material and infuses the liquid base material into the plurality of nanotubes forming the strand or yarn.
- The strand or yarn coated and infused with the liquid base material is then caused to solidify, thereby completing the method of making the hybrid fiber of the invention.
- Further features of the hybrid fiber of the invention and its method of construction are set forth in the following description of the fiber and method and in the drawing figures.
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FIG. 1 is a schematic representation of a longitudinal cross-section of a portion of a fiber reinforced with whiskers where the whiskers make up only a small volume fraction of the hybrid fiber. -
FIG. 2 is a schematic representation of a portion of the yarn length of interwoven nanotubes. -
FIG. 3 is a schematic representation of a portion of the length of the hybrid fiber. -
FIG. 4 is a schematic representation of a method of producing the hybrid fiber. -
FIG. 5 is a schematic representation of a method of producing the hybrid fiber. -
FIG. 1 is a representation of a basic embodiment of a hybrid fiber.FIG. 1 shows a hybrid fiber of glass base material that is fibril reinforced by a plurality of isolated fibrils. -
FIG. 1 is a representation of a cross-section of a portion of the hybrid fiber length. In theactual hybrid fiber 10, the fiber is surrounded by a generally cylindricalexterior surface 14 having acenter axis 16 that extends along the fiber length. Thehybrid fiber 10 is basically comprised of abase material 12 that forms the overall fiber body. Thebase material 12 is a pure material, for example a pure glass. In the example shown inFIG. 1 the base material is glass. Other known fiber base materials could also be used in thehybrid fiber 10. - A plurality of individual isolated
fibrils 20 is distributed throughout thebase material 12. Thefibrils 20 can be small filaments, nanotubes such as carbon nanotubes, boron nitride nantotubes, whiskers such as silicon carbide or others. Thefibrils 20 are primarily distributed through theinterior 22 of thehybrid fiber 10, but some of thefibrils 20 could also be distributed along and around thefiber exterior surface 14. The plurality offibrils 20 each have a length that is substantially aligned with the length oraxis 16 of thehybrid fiber 10. - The
fibrils 20 are materials that have better properties, such as tensile strength, compressive strength, elastic modulus (mechanical stiffness), electrical conductivity, and dielectric coefficient, among others, than thebase material 12 of thehybrid fiber 10. However, the materials of thefibrils 20 cannot be grown in the length or size desired for thefibrils 20 to be used in a fiber composite. An example of such a material of thefibrils 20 is a nanotube. In the exemplary embodiment of thehybrid fiber 10 shown inFIG. 1 , thefibrils 20 are carbon nanotubes, either single wall or multi wall. The longest carbon nanotubes that have been made to date are of the order of a centimeter in length, whereas the fibers used in most fiber composites are continuous. Other fibril materials include silicone carbide and boron nitride. The material of thefibrils 20 must be chemically compatible with thebase material 12 of thehybrid fiber 10. The material of thefibrils 20 must not degrade at temperatures at which the glass orother base material 12 can flow to form the final shape of thehybrid fiber 10. - The basic technology for spinning short lengths of filaments into a longer length of yarn has been known for some time in the textile industry. In general, the length of a piece of yarn can be greater than the lengths of any individual filament woven into and composing the yarn. In the present invention, this basic technology is employed to create yarns from very small diameter fibrils, such as carbon nanotubes.
-
FIG. 2 is a representation of a portion of a length ofyarn 26. Theyarn 26 is created from two or moreindividual fibrils 28. In general, the length ofyarn 26 has acenter axis 30 when the yarn is held straight, and thefibrils 28 have lengths that are predominantly aligned with theyarn center axis 30. As represented inFIG. 2 , thefibrils 28 may twist around theyarn center axis 30 within theyarn 26. It should be understood that inFIG. 2 , only a segment of theyarn length 26 is shown. Some of thefibrils 28 have been removed from the representation of the opposite ends of the segment ofyarn 26 to better show the twisted or interwoven structure of the yarn. Theyarn 26 formed from thefibrils 28 has a similar structure to a conventional yarn composed of fibers, with the primary difference being that thefibrils 28 have a smaller diameter and length, compared to conventional fibers of a conventional yarn. For example, conventional carbon fibers may have a diameter of 3-50 microns, whereascarbon nanotube fibrils 28 may have a diameter of 1-100 nanometers. For point of reference, the diameter of an atom ranges from about 0.1-0.5 nanometer. The diameter of thefibrils 28 could be as large as 5 microns if a large diameter hybrid fiber were to be made. - In the present invention, one or
more yarns 26, composed of thefibrils 28 ornanotubes 28, are embedded in a cylindrical form of a conventionalfiber base material 32 to create thehybrid fiber 34. In the example to follow, glass is the conventionalfiber base material 32. However, it should be understood that any of the conventional fiber base materials may also be used, such as polyethylene or other polymers, including thermoset base materials and thermoplastic base materials. -
FIG. 3 is a representation of a possible structure of the portion of the overall length of ahybrid fiber 34. Thehybrid fiber 34 basically consists of a continuous phase of thefiber base material 32, in which one or more of the reinforcingyarns 26 comprised of fibrils ornanotubes 28 are embedded. The continuousphase base material 32 is represented as being transparent inFIG. 3 for clarity in showing the interior of thehybrid fiber 34. It is not necessary that thebase material 32 be transparent. - The
base material 32 covers the plurality of fibrils ornanotubes 28 and permeates or is infused into the fibrils ornanotubes 28 along the length of thehybrid fiber 34. The plurality of fibrils ornanotubes 28 are primarily contained in the interior of thebase material 32 that makes up thehybrid fiber 34. However, it is possible that at least some of the fibrils ornanotubes 28 would be positioned on the generally cylindricalexterior surface 38 of thehybrid fiber 34. Although the terminal ends of some of the fibrils are shown at uniform locations inFIG. 3 , in reality the terminal end locations would be random. - It should be appreciated that composing or interweaving the plurality of fibrils or
nanotubes 28 in ayarn 26 enables a much greater density of the fibrils or nanotubes than if a collection of fibrils ornanotubes 28 were individually embedded in theyarn 26, for example in the embodiment represented inFIG. 1 . The intertwining of the fibrils ornanotubes 28 within theyarn 26 keeps the fibrils or nanotubes in relatively tight geometry, although there is sufficient space between adjacent fibrils ornanotubes 28 for the continuousphase base material 32 to infuse within theyarn 26 and make intimate contact with all of the fibrils ornanotubes 28. Appropriate surface energetics (i.e., wetting) will aid this. The volume percentage of the plurality of nanotubes in the hybrid fiber is in a range of 10% to 90%, and preferably 30% to 80%. -
FIG. 4 is a representation of a method of making thehybrid fiber 34 of the invention. In the method ofFIG. 4 , the fibrils ornanotube 28 reinforcement of thehybrid fiber 34 consists of asingle yarn 26 formed from a plurality of nanotubes. Theyarn 26 is pulled through a “molten” bath of the continuousphase base material 32. By “molten”, it is intended that thebase material 32 be flowable like a liquid, although it may have a high viscosity. It is therefore intended that thebase material 32 described with reference toFIG. 4 cover any type of known base material including glass, thermoset base materials and thermoplastic base materials. - In
FIG. 4 , theyarn 26 passes from asupply reel 42 through anozzle 44 and into the interior of acontainer 46 that contains a molten bath of continuousphase base material 32. Aheater 48 controls the temperature of the bath ofbase material 32. While in the bath of base material, theyarn 26 is infused by the continuousphase base material 32, which wets the fibrils ornanotubes 28 composing theyarn 26. Upon exiting the bath ofbase material 32 from the top surface of the bath, the fibrils ornanotubes 28 in theyarn 26 and the infusedbase material 32 pass through anoptional ring 50. Thering 50 scrapes off any excess continuousphase base material 32. The fibrils ornanotubes 28 and the infusedbase material 32 are then allowed to cool below the solidification temperature of thebase material 32 and to solidify. This forms thehybrid fiber 34. - The
hybrid fiber 34 is then wound on a take upreel 52. To form a quasi-continuous process, ahopper 54 may addextra base material 32, either in molten form or as solid pellets that are melted by the heat of the bath ofbase material 32. - The inner diameter of the
nozzle 44 on thecontainer 46 must be large enough to allow theyarn 26 to easily pass through thenozzle 44, but must not be so large that the molten bath ofbase material 32 can drip out through thenozzle 44. In general, the surface tension of the molten bath ofbase material 32 would be enough to prevent the unwanted dripping of thebase material 32 through thenozzle 44 if the diameter of thenozzle 44 is between 1-2 mm. This will allow easy passage of yarns of diameters up to almost 1 mm. Most yarn diameters of interest will be 5-20 microns. - The method represented in
FIG. 4 may also be used with multiple yarns that are gathered together in a tow. Additionally, the method could proceed in the opposite direction to that described above, i.e., fromreel 52 to reel 42. In such a method theoptional ring 50 would be moved below thenozzle 44. -
FIG. 5 is a representation of a further method of making thehybrid fiber 34 of the invention. In the method ofFIG. 5 , the fibril ornanotube 28 reinforcement of thehybrid fiber 34 consists of asingle yarn 26 formed from a plurality of the nanotubes. Theyarn 26 is pulled over a surface of a heated roller and “molten” continuousphase base material 32 is poured onto the roller and is infused into the yarn. Again, by “molten”, it is intended that thebase material 32 be flowable like a liquid, although it may have a high viscosity. It is therefore intended that thebase material 32 described with reference toFIG. 5 cover any type of known base material including glass, thermoset base materials and thermoplastic base materials. - In
FIG. 5 , theyarn 26 leaves asupply reel 58 and travels over part of acylindrical exterior surface 60 of a combiningwheel 62 which is rotating in a clockwise direction as viewed inFIG. 5 . Acontainer 64 holding themolten base material 32 is positioned above the combiningwheel exterior surface 60. Thecontainer 64 has aspout 66 that extends downwardly from the container to anozzle 68 at the distal end of the spout. Thenozzle 68 is positioned just above the combiningwheel exterior surface 60 and aportion 72 of the yarn on the surface. Themolten base material 32 passes through thespout 66 and thenozzle 68 and drops onto the portion ofyarn 72 on the combiningwheel exterior surface 60. Thebase material 32 dropped onto the portion ofyarn 72 coats the portion of yarn and is infused into the plurality of fibrils ornanotubes 28 that form the yarn. - The portion of the
yarn 72 that has been coated and infused with thebase material 32 then leaves the combiningwheel exterior surface 60 and passes through anoptional ring 74. Thering 74 scrapesexcess base material 32 from the portion ofyarn 72 and gives the cylindrical exterior surface shape to thehybrid fiber 34. The resultinghybrid fiber 34 then passes onto a take upreel 78. - The combining
wheel 62 may be heated to prevent the base material dropped onto the portion of theyarn 72 from beginning to solidify until the portion ofyarn 72 coated and infused with the base material leaves the combiningwheel exterior surface 60. - In a quasi-continuous process, the
supply reel 58 and the take upreel 78 rotate synchronously so that the yarn travels at a constant speed throughout the process. - The method represented in
FIG. 5 may also be used with multiple yarns that are gathered together in a tow. - Other methods of infusing the yarn with base material could also be employed, such as chemical vapor deposition (CVD) or physical vapor deposition (PVD).
- As various modifications could be made in the constructions of the hybrid fiber and the methods of making the hybrid fiber described herein and illustrated without departing from the scope of the invention, it is intended that all matter contained in the foregoing description or shown in the accompanying drawings shall be interpreted as illustrative rather than limiting. Thus, the breadth and scope of the present invention should not be limited by any of the above described exemplary embodiments, but should be defined only in accordance with the following claims appended hereto and their equivalents.
Claims (21)
1. A hybrid fiber comprising:
a base material permeating an interior of the hybrid fiber and a length of the hybrid fiber; and,
a plurality of fibrils distributed throughout the base material, each fibril of the plurality of fibrils having a length that is a fraction of the hybrid fiber length and is aligned with the hybrid fiber length; and
the plurality of fibrils being formed into a yarn with the base material being infused into the yarn.
2. The hybrid fiber of claim 1 , further comprising:
each fibril of the plurality of fibrils being a nanotube.
3. The hybrid fiber of claim 1 , further comprising:
each fibril of the plurality of fibrils being a carbon nanotube.
4. The hybrid fiber of claim 1 , further comprising:
each fibril of the plurality of fibrils being silicon carbide.
5. The hybrid fiber of claim 1 , further comprising:
the base material being a polymer.
6. The hybrid fiber of claim 1 , further comprising:
the base material being glass.
7. The hybrid fiber of claim 1 , further comprising:
a volume percentage of the plurality of fibrils in the hybrid fiber being in a range of 10 percent to 90 percent.
8. The hybrid fiber of claim 1 , further comprising:
a volume percentage of the plurality of fibrils in the hybrid fiber being in a range of 30 percent to 80 percent.
9. The hybrid fiber of claim 1 , further comprising:
the hybrid fiber being one of a plurality of hybrid fibers that are imbedded in a composite material.
10. A hybrid fiber comprising:
a base material permeating a length of the hybrid fiber; and,
a plurality of nanotubes distributed throughout the base material and interwoven into a yarn that extends the length of the hybrid fiber, each nanotube of the plurality of nanotubes having a length that is aligned with the length of the hybrid fiber and is a fraction of the length of the hybrid fiber.
11. The hybrid fiber of claim 10 , further comprising:
the plurality of nanotubes being carbon nanotubes.
12. The hybrid fiber of claim 10 , further comprising:
a volume percentage of the plurality of nanotubes in the hybrid fiber being in a range of 30 percent to 80 percent.
13. A method of making a hybrid fiber comprising:
aligning and overlapping a plurality of fibrils forming a continuous strand having a strand length where each fibril of the plurality of fibrils has a fibril length that is aligned with the strand length and is a fraction of the strand length;
successively coating the strand with a liquid base material and infusing the liquid base material into the plurality of fibrils forming the strand; and,
allowing the liquid base material coating the strand and infused in the plurality of fibrils forming the strand to solidify resulting in the hybrid fiber.
14. The method of claim 13 , further comprising:
twisting the plurality of fibrils together and forming the strand as a yarn.
15. The method of claim 13 , further comprising:
using a plurality of nanotubes as the plurality of fibrils.
16. The method of claim 13 , further comprising:
using a plurality of carbon nanotubes as the plurality of fibrils.
17. The method of claim 13 , further comprising:
using a glass as the base material.
18. The method of claim 13 , further comprising:
pulling the strand through a bath of the liquid base material.
19. The method of claim 18 , further comprising:
containing the liquid base material in a container having a nozzle opening;
pulling the strand through the nozzle opening and into the liquid base material in the container and thereby successively coating the strand with the liquid base material and infusing the liquid base material into the plurality of fibrils forming the strand;
pulling the strand from the liquid base material; and,
allowing the liquid base material coating the strand and infused in the plurality of fibrils forming the strand to solidify resulting in the hybrid fiber.
20. The method of claim 13 , further comprising:
pulling the strand over a surface;
pouring the liquid base material onto the surface and the strand and thereby successively coating the strand with the liquid base material and infusing the liquid base material into the plurality of fibrils forming the strand;
pulling the strand from the surface; and,
allowing the liquid base material coating the strand and infused in the plurality of fibrils forming the strand to solidify resulting in the hybrid fiber.
21. The method of claim 20 , further comprising:
using a rotating cylindrical surface as the surface.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/930,637 US20150004392A1 (en) | 2013-06-28 | 2013-06-28 | Whisker-reinforced hybrid fiber by method of base material infusion into whisker yarn |
EP14790795.0A EP3013771B1 (en) | 2013-06-28 | 2014-04-03 | Whisker-reinforced hybrid fiber by method of base material infusion into whisker yarn |
PCT/US2014/032869 WO2014209461A2 (en) | 2013-06-28 | 2014-04-03 | Whisker-reinforced hybrid fiber by method of base material infusion into whisker yarn |
CN201480033718.9A CN105308005A (en) | 2013-06-28 | 2014-04-03 | Whisker-reinforced hybrid fiber by method of base material infusion into whisker yarn |
JP2016523729A JP6458017B2 (en) | 2013-06-28 | 2014-04-03 | Hybrid fiber reinforced with whiskers by substrate injection into whisker yarn |
Applications Claiming Priority (1)
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US13/930,637 US20150004392A1 (en) | 2013-06-28 | 2013-06-28 | Whisker-reinforced hybrid fiber by method of base material infusion into whisker yarn |
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US20150004392A1 true US20150004392A1 (en) | 2015-01-01 |
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US13/930,637 Abandoned US20150004392A1 (en) | 2013-06-28 | 2013-06-28 | Whisker-reinforced hybrid fiber by method of base material infusion into whisker yarn |
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US (1) | US20150004392A1 (en) |
EP (1) | EP3013771B1 (en) |
JP (1) | JP6458017B2 (en) |
CN (1) | CN105308005A (en) |
WO (1) | WO2014209461A2 (en) |
Cited By (1)
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US20160351782A1 (en) * | 2015-05-28 | 2016-12-01 | Honda Motor Co., Ltd. | Electrostrictive element and manufacturing method therefor |
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CN111819318A (en) * | 2018-02-19 | 2020-10-23 | 弗兹生物科技有限责任公司 | Apparatus and method for applying additives to substrates and related products |
CN109402816A (en) * | 2018-12-11 | 2019-03-01 | 苏州璟珮新材料科技有限公司 | A kind of nonmetallic electric heating function yarn |
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Also Published As
Publication number | Publication date |
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WO2014209461A3 (en) | 2015-02-26 |
JP6458017B2 (en) | 2019-01-23 |
CN105308005A (en) | 2016-02-03 |
EP3013771B1 (en) | 2020-08-05 |
JP2016526619A (en) | 2016-09-05 |
EP3013771A2 (en) | 2016-05-04 |
WO2014209461A2 (en) | 2014-12-31 |
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