Filaments Patents (Class 264/29.2)
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Patent number: 11401629Abstract: The present invention discloses a method for preparing graphene nanofibers and non-woven fabrics using a fluid with a ultra-high draw ratio by means of a high-voltage electrospinning method. Compared with other methods for preparing graphene fibers (such as wet spinning, air-assisted spinning, etc.), the graphene fibers obtained by the present method have smaller diameters (about 100 nm to 500 nm) and a higher yield. The fibers themselves have better mechanical and electrical properties. The invention discloses a method for preparing ultra-fine graphene nanofibers and non-woven fabrics by electrospinning a mixed spinning liquid system of polymer and graphene oxide (the polymer is sodium polyacrylate). This method is highly efficient and environmentally friendly, and the resulted graphene nanofibers are the thinnest graphene fibers as currently known.Type: GrantFiled: November 13, 2020Date of Patent: August 2, 2022Assignee: ZHEJIANG UNIVERSITYInventors: Chao Gao, Jiaqing Wang
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Patent number: 11268215Abstract: Provided is a method of producing a carbon fiber, the method including: a) adding an acrylonitrile-based polymer solution to a solution containing a glycol-based compound having a boiling point of 180 to 210° C. to precipitate an acrylonitrile-based polymer; b) melt spinning the acrylonitrile-based polymer to obtain a spun fiber; and c) performing stabilization and carbonization on the spun fiber to obtain a carbon fiber.Type: GrantFiled: April 10, 2020Date of Patent: March 8, 2022Assignee: HPK INC.Inventors: Chang Hyun Cho, Chang Se Woo, Kap Seung Yang, Chang Ha Lim, Sun Ho Choe, Hong Min Kim, Kyung Ae Oh, Eun Ji Kim
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Patent number: 11261545Abstract: A carbon fiber production method includes a carbon fiber production step including an oxidation step and a carbonization step; and an exhaust gas processing step including a heat exchange step; an external air mixing step; and a mixed external air supplying step in which the mixed external air is supplied to at least one step that uses heated gas in the steps in the carbon fiber production step; and among the exhaust gases, a high heating value exhaust gas having a heating value of 250 kcal/Nm3 or higher is supplied to an inlet side of an exhaust gas combustion apparatus and a low heating value exhaust gas having a heating value lower than 150 kcal/Nm3 is supplied to an outlet side of the exhaust gas combustion apparatus, respectively.Type: GrantFiled: March 8, 2018Date of Patent: March 1, 2022Assignee: Toray Industries, Inc.Inventors: Kosuke Taki, Hiroomi Ueda, Hiroyuki Konishi
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Patent number: 11168466Abstract: A shovel includes a lower traveling body, an upper turning body turnably mounted on the lower traveling body, an attachment attached to the upper turning body, and a display device provided in a cab mounted on the upper turning body. The display device is configured to display a first image and a second image. The first image includes a first graphic representing the position of a preset target work surface and a second graphic vertically arranged relative to the first graphic. The second graphic represents a change in the size of the distance between a working part of the attachment and the target work surface by changing an indicator position. The second image represents the change in the size of the distance by changing a display format in the same part. The first graphic is displayed at the same height as the second image.Type: GrantFiled: September 26, 2019Date of Patent: November 9, 2021Assignee: SUMITOMO(S.H.I) CONSTRUCTION MACHINERY CO., LTD.Inventor: Takeya Izumikawa
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Patent number: 11168445Abstract: A method for manufacturing a carbon fiber sheet, the method including a carbon fiber forming step of heating a resin sheet to a carbonization temperature at a heating rate of 15,000° C./sec or higher, thereby forming a carbon fiber from the resin sheet. In the carbon fiber forming step, the resin sheet is preferably irradiated with an energy ray having an output density of 130 W/mm2 or higher and an amount of irradiation energy of 0.05 J/mm2 or more.Type: GrantFiled: August 8, 2017Date of Patent: November 9, 2021Assignee: HONDA MOTOR CO., LTD.Inventors: Tomoko Tamai, Yuichi Hori, Kazuhide Matsuo, Satoshi Aoki, Satoshi Yonezawa, Hidetoshi Utsumi, Yasuro Katsuyama, Takehiro Mugishima
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Patent number: 11066759Abstract: The present invention provides pitch-based ultrafine carbon fibers that have an average fiber diameter of at least 100 nm and less than 700 nm, and an average fiber length of 10 ?m or more, wherein C—O bonds >C?O bonds in terms of the abundance ratio (molar ratio) of C—O bonds and C?O bonds derived from the O1s orbital as measured by X-ray photoelectron spectroscopy.Type: GrantFiled: September 28, 2016Date of Patent: July 20, 2021Assignee: TEIJIN LIMITEDInventors: Ryota Hirakawa, Kazuki Yachi, Asami Kanematsu
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Patent number: 10774447Abstract: There is provided a method of making a hollow fiber. The method includes mixing, in a first solvent, a plurality of nanostructures, one or more first polymers, and a fugitive polymer which is dissociable from the nanostructures and the one or more first polymers, to form an inner-volume portion mixture. The method further includes mixing, in a second solvent, one or more second polymers to form an outer-volume portion mixture, and spinning the inner-volume portion mixture and the outer-volume portion mixture to form a precursor fiber. The method further includes heating the precursor fiber to oxidize the precursor fiber and to change a molecular-bond structure of the precursor fiber, and during heating, extracting the fugitive polymer from the inner-volume portion mixture. The method further includes obtaining the hollow fiber with the inner-volume portion having the nanostructures and the first polymers, and with the outer-volume portion having the second polymers.Type: GrantFiled: April 8, 2019Date of Patent: September 15, 2020Assignee: The Boeing CompanyInventor: Thomas Karl Tsotsis
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Patent number: 10696804Abstract: The present invention relates to a carbon fiber composite material containing carbon fibers coated with amorphous carbon, and a matrix resin. According to the present invention, a high-strength carbon fiber composite material can be provided.Type: GrantFiled: November 16, 2016Date of Patent: June 30, 2020Assignee: SEKISUI CHEMICAL CO., LTD.Inventor: Masanori Nakamura
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Patent number: 10658424Abstract: A superconducting integrated circuit includes at least one superconducting resonator, including a substrate, a conductive layer disposed over a surface of the substrate with the conductive layer including at least one conductive material including a substantially low stress polycrystalline Titanium Nitride (TiN) material having an internal stress less than about two hundred fifty MPa (magnitude) such that the at least one superconducting resonator and/or qubit (hereafter called “device”) is provided as a substantially high quality factor, low loss superconducting device.Type: GrantFiled: July 21, 2016Date of Patent: May 19, 2020Assignee: MASSACHUSETTS INSTITUTE OF TECHNOLOGYInventors: William D. Oliver, Rabindra N. Das, David J. Hover, Danna Rosenberg, Xhovalin Miloshi, Vladimir Bolkhovsky, Jonilyn L. Yoder, Corey W. Stull, Mark A. Gouker
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Patent number: 10525641Abstract: Apparatuses for forming a composite structure are configured to provide a tension at least partially along at least one ply of material as the at least one ply of material is supplied from a material feed assembly to a tool.Type: GrantFiled: February 1, 2018Date of Patent: January 7, 2020Assignee: Northrop Grumman Innovation Systems, Inc.Inventors: Vernon M. Benson, Jason K. Slack, Todd A. Rosevear, James L. Harvey, Mark Roman, Timothy S. Olschewski
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Patent number: 10422054Abstract: A method of producing doped carbon fibers, doped systems to prepare graphene-fiber hybrid structures, or doped carbon nanostructures, includes forming doped polymer precursors and decomposing at least a portion of the polymeric precursors to form carbon fibers. The decomposition may be accomplished by treating the doped polymer precursors with acid vapor from an aqueous acid solution at a temperature of less than 250° C.Type: GrantFiled: September 22, 2016Date of Patent: September 24, 2019Assignee: Board of Regents of the University of Texas SystemInventors: Karen Lozano, Lee Daniel Cremar, Maria del Rocio Nava Lara, Mandana Akia
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Patent number: 10388967Abstract: A porous carbon catalyst exhibiting excellent catalytic activity and a method of producing the same, and an electrode and a battery. The porous carbon catalyst is obtained through carbonization of an organic polymer porous body having a skeleton containing a metal in an inside thereof. The porous carbon catalyst may have a skeleton containing the metal in an inside thereof, and the skeleton may be a particle aggregate-like skeleton. The method of producing a porous carbon catalyst includes carbonizing an organic polymer porous body having a skeleton containing a metal in an inside thereof.Type: GrantFiled: June 4, 2014Date of Patent: August 20, 2019Assignee: NISSHINBO HOLDINGS INC.Inventors: Yasuo Imashiro, Yuji Kubota, Akiko Taira
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Patent number: 10350878Abstract: A system for additively manufacturing a composite part comprises a delivery guide, movable relative to a surface. The delivery guide is configured to deposit at least a segment of a continuous flexible line along a print path. The continuous flexible line comprises a non-resin component and a thermosetting-resin component. The thermosetting-resin component comprises a first part and a second part. The non-resin component comprises a first element and a second element. The system further comprises a first resin-part applicator, configured to apply the first part to the first element, and a second resin-part applicator, configured to apply the second part to the second element. The system also comprises a feed mechanism, configured to pull the first element through the first resin-part applicator, to pull the second element through the second resin-part applicator, and to push the continuous flexible line out of the delivery guide.Type: GrantFiled: March 7, 2016Date of Patent: July 16, 2019Assignee: The Boeing CompanyInventors: Nick S. Evans, Faraòn Torres, Ryan G. Ziegler, Samuel F. Harrison, Ciro J. Grijalva, III, Hayden S. Osborn
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Patent number: 10260171Abstract: The present invention relates to a method for the continuous production of low thermal conductivity endless filament yarns with a compact, homogeneous structural morphology. The presently disclosed methods utilize safe and recyclable ionic liquids to produce carbon fiber precursors from cellulose. The fibers are produced by the carbonization of cellulose carbon fiber precursors. The precursor fiber filaments have an increased tear resistance with simultaneously sufficient elongation, a round or crenulated cross-section, and homogeneous fiber morphology. The filament yarns exhibit performance characteristics similar to those produced from traditional viscose rayon. The resulting fibers are especially suited for aerospace applications in composite materials used at the limits of high temperatures, for instance in structures found in rocket nozzles or atmospheric reentry heat shields on spacecraft.Type: GrantFiled: January 17, 2017Date of Patent: April 16, 2019Assignee: The Board of Trustees of the University of Alabama, For and on behalf of The University of Alabama in HuntsvilleInventor: William Felix Kaukler
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Patent number: 10246798Abstract: There is provided a method of making a fiber having improved resistance to microfracture formation at a fiber-matrix interface. The method includes mixing a plurality of nanostructures and one or more first polymers in a first solvent to form an inner-volume portion mixture, mixing one or more second polymers in a second solvent to form an outer-volume portion mixture, spinning the inner-volume portion mixture and the outer-volume portion mixture to form a precursor fiber, heating the precursor fiber to oxidize the precursor fiber and to change a molecular-bond structure of the precursor fiber, and obtaining a fiber. The fiber has an inner-volume portion with a first outer diameter, the nanostructures, and with the one or more first polymers, and has an outer-volume portion with a second outer diameter and the one or more second polymers, the outer-volume portion being in contact with and completely encompassing the inner-volume portion.Type: GrantFiled: February 23, 2017Date of Patent: April 2, 2019Assignee: The Boeing CompanyInventor: Thomas Karl Tsotsis
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Patent number: 10066342Abstract: According to an aspect, the present embodiments may be associated with a wet-laid, nonwoven material including high temperature refractory fibers and thermoplastic fibers formed into the nonwoven material using a wet-laid process. In an embodiment, a fluoropolymer is included in the nonwoven material. In an embodiment, the refractory fibers are at least partially cleaned of shot and latex binder or binder fiber is eliminated or at least substantially reduced.Type: GrantFiled: December 18, 2015Date of Patent: September 4, 2018Assignee: Lydall, Inc.Inventors: Casey James Lasell, Jeff Daval Miller
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Patent number: 9920456Abstract: A carbon-fiber-precursor acryl fiber bundle, including a polyacrylonitrile-based copolymer that contains from 95 to 99 mol % of an acrylonitrile unit and from 1 to 5 mol % of a hydroxyalkyl (meth)acrylate unit, where the fiber bundle has a single-fiber fineness of from 1.5 dtex to 5.0 dtex and a roundness of from 0.75 to 0.9 in a cross-section shape perpendicular to a fiber axis of the single fiber; the roundness being determined with equation (1): roundness=4?S/L2, where S is a cross-sectional area of the single fiber and L is a circumferential length of the single fiber, and S and L are obtained by observing, under an SEM, the cross-section of the single fiber perpendicular to the fiber axis of the single fiber and analyzing the obtained image.Type: GrantFiled: October 13, 2011Date of Patent: March 20, 2018Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Yuusuke Shinmen, Norifumi Hirota, Takeshi Nii
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Patent number: 9890480Abstract: Poly-(caffeyl alcohol) (PCFA), also known as C-lignin, is a promising new source of both carbon fibers and pure carbon. PCFA can be used to produce carbon fibers by direct electrospinning, without blending with another polymer to reduce breakage. Analyses have shown that the carbon obtained from PCFA is superior to that obtained from other lignins. The fibers formed from PCFA are smoother, have a narrower diameter distribution, and show very low defects. The PCFA can be obtained by extraction from plant seed coats. Examples of these plants include the vanilla orchid, Vanilla planifolia, and Jatropha curcas. The fibers may be formed through electrospinning, although other methods for forming the fibers, such as extrusion with a carrier polymer, could be used. The fibers may then be carbonized to increase the carbon yield.Type: GrantFiled: June 3, 2015Date of Patent: February 13, 2018Assignee: UNIVERSITY OF NORTH TEXASInventors: Richard Dixon, Nandika D'Souza, Fang Chen, Mangesh Nar
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Patent number: 9828700Abstract: Methods for the preparation of carbon fiber from polyolefin fiber precursor, wherein the polyolefin fiber precursor is partially sulfonated and then carbonized to produce carbon fiber. Methods for producing hollow carbon fibers, wherein the hollow core is circular- or complex-shaped, are also described. Methods for producing carbon fibers possessing a circular- or complex-shaped outer surface, which may be solid or hollow, are also described.Type: GrantFiled: March 30, 2015Date of Patent: November 28, 2017Assignee: UT-BATTELLE, LLCInventors: Amit Kumar Naskar, Marcus Andrew Hunt, Tomonori Saito
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Patent number: 9738994Abstract: A carbon-fiber-precursor acrylic fiber bundle which can smoothly pass through a flame-resistance impartation step and a carbonization step. The carbon-fiber-precursor acrylic fiber bundle has a high-density part as a portion thereof, wherein the high-density part satisfies the following requirements (A) and (B). Requirement A: The high-density part has a maximum fiber density ?max of 1.33 g/cm3 or higher. Requirement B: The portion extending between an intermediate-density point and a maximum-density-region arrival point has an increase in fiber density of 1.3×10?2 g/cm3 or less per 10 mm of the fiber bundle length.Type: GrantFiled: April 12, 2013Date of Patent: August 22, 2017Assignee: Mitsubishi Chemical CorporationInventors: Tadanobu Ikeda, Tadao Samejima, Youji Hatanaka, Tetsu Yasunami
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Patent number: 9725829Abstract: Method for the preparation of carbon fiber from fiber precursor, wherein the fiber precursor is subjected to a magnetic field of at least 3 Tesla during a carbonization process. The carbonization process is generally conducted at a temperature of at least 400° C. and less than 2200° C., wherein, in particular embodiments, the carbonization process includes a low temperature carbonization step conducted at a temperature of at least or above 400° C. or 500° C. and less than or up to 1000° C., 1100° C., or 1200° C., followed by a high temperature carbonization step conducted at a temperature of at least or above 1200° C. In particular embodiments, particularly in the case of a polyacrylonitrile (PAN) fiber precursor, the resulting carbon fiber may possess a minimum tensile strength of at least 600 ksi, a tensile modulus of at least 30 Msi, and an ultimate elongation of at least 1.5%.Type: GrantFiled: March 15, 2013Date of Patent: August 8, 2017Assignee: UT-BATTELLE, LLCInventors: Amit K. Naskar, Soydan Ozcan, Claude C. Eberle, Mohamed Gabr Abdallah, Gail Mackiewicz Ludtka, Gerard Michael Ludtka, Felix Leonard Paulauskas, John Daniel Kennedy Rivard
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Patent number: 9728809Abstract: A nonaqueous electrolyte battery includes a positive electrode, a negative electrode and a nonaqueous electrolyte. The negative electrode contains a titanium-containing oxide. The nonaqueous electrolyte contains a compound having a functional group represented by the formula (1) below and a sultone having an unsaturated hydrocarbon group. [Chem.Type: GrantFiled: December 27, 2007Date of Patent: August 8, 2017Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Hiroki Inagaki, Yumi Fujita, Norio Takami
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Patent number: 9593210Abstract: Methods of producing low-halogen-containing polysilazane resins, which are used to make silicon carbide fibers and ceramic coatings, provide processes for removing halogens, including chlorine, from precursor polysilazane resins.Type: GrantFiled: April 22, 2016Date of Patent: March 14, 2017Assignee: General Electric CompanyInventors: Slawomir Rubinsztajn, Eric James Pressman, Ryan Christopher Mills, Peter Kennedy Davis
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Patent number: 9551098Abstract: A nonwoven material is composed of a nonwoven batt of a plurality of bundles formed of carbon fibers. At least some of the bundles have a curved progression that includes a curved vertex area of a first curvature between the bundle ends and at least one bundle end area of a second curvature extending from said one bundle end to the vertex. The first curvature is greater than the second curvature, in particular it is greater by at least 50%.Type: GrantFiled: November 3, 2011Date of Patent: January 24, 2017Assignee: SGL Automotive Carbon Fibers GmbH & Co. KGInventors: Birgit Reiter, Martin Danzer, Gerald Ortlepp
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Patent number: 9510977Abstract: A wound dressing for covering a wound is formed of at least one absorbing member and a plurality of elongated activated carbon fibers. The at least one absorbing member is made of a foamed polymeric material and includes a plurality of pores. The activated carbon fibers are distributed in the at least one absorbing member and partially protrude into the pores. Each of the activated carbon fibers has a diameter of 2-15 ?m and a length of 40-1500 ?m. In light of the above, the tissue fluid leaking from the wound can be absorbed by the absorbing member to prevent the wound from soakage and the activated carbon fibers inside the absorbing member can emit far-infrared rays to promote the blood circulation around the wound for quickening healing of the wound.Type: GrantFiled: September 4, 2013Date of Patent: December 6, 2016Assignee: BIO-MEDICAL CARBON TECHNOLOGY CO., LTD.Inventors: Tse-Hao Ko, Jui-Hsiang Lin, Pei-Hsun Chou, Yen-Ju Su
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Device for manufacturing recycled carbon fibers, and method for manufacturing recycled carbon fibers
Patent number: 9463979Abstract: The purpose of the present invention is to provide a manufacturing device and a manufacturing method that use carbon fiber reinforced plastic (CFRP) as a source material for the efficient, low-cost manufacture of recycled carbon fibers exhibiting excellent ease of handling. A device for manufacturing recycled carbon fibers is provided with: a dry distillation-carbonization furnace (101) having a box-shaped main body (105), a dry distillation-carbonization chamber (102) which accommodates CFRP (40), a combustion chamber (103) equipped with a burner (104), and a heating chamber (115) formed in the space between the main body (105) and the dry distillation-carbonization chamber (102); and a continuous furnace (26) that continuously heats the CFRP (25) after dry distillation and removes a portion of the fixed carbon.Type: GrantFiled: August 29, 2012Date of Patent: October 11, 2016Assignee: Carbon Fiber Recycle Industry Ltd.Inventors: Hidehito Itazu, Hajime Kanki -
Patent number: 9446955Abstract: Disclosed is a method of producing a continuous lignin fiber from softwood and/or hardwood alkali lignin. The lignin fiber can be further treated to obtain structural carbon fiber.Type: GrantFiled: February 13, 2012Date of Patent: September 20, 2016Assignee: INNVENTIA ABInventors: Elisabeth Sjholm, Goran Gellerstedt, Rickard Drougge, Ida Norberg, Ylva Nordstrom
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Patent number: 9434617Abstract: Disclosed are carbon nanotubes and a method for manufacturing the same. Advantageously, the method provides a high yield of potato or sphere-shaped non-bundled carbon nanotubes having a bulk density of 80 to 250 kg/m3, an ellipticity of 0.9 to 1.0 and a particle diameter distribution (Dcnt) of 0.5 to 1.0 using a two-component carbon nanotube catalyst comprising a catalyst component and an active component.Type: GrantFiled: February 10, 2015Date of Patent: September 6, 2016Assignee: LG Chem, Ltd.Inventors: Kyung Yeon Kang, Jin Do Kim, Sung Jin Kim, Jae Keun Yoon
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Patent number: 9428850Abstract: Processes for producing carbon fiber, the filament thereof and pre-oxidized fiber are provided. In one embodiment, the gel spinning of polyacrylonitrile filament is achieved by using small-molecule gelling agent, and the carbon fiber obtained thereby is increased by 15% to 40% in tensile strength and by 20% to 35% in toughness. In another embodiment, the melt spinning process of polyacrylonitrile is conducted by using imidazole type ion liquid as plasticizer, the process reduces environment pollution, is suitable for industrial production and the fiber produced thereby is improved in its strength. In yet another embodiment, polyacrylonitrile pre-oxidized fiber is produced by melt spinning, so low cost and controllable pre-oxidization of polyacrylonitrile can be achieved. In a further embodiment, high strength carbon fiber is manufactured by using polymer thickening agent.Type: GrantFiled: October 20, 2014Date of Patent: August 30, 2016Assignee: DONGHUA UNIVERSITYInventors: Muhuo Yu, Huaiping Rong, Keqing Han, Zhaohua Wang, Yiwei Zhang, Qinli Dong
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Patent number: 9379385Abstract: (Problem) A porous carbon material having excellent graphite crystallinity, good carrier mobility and proper porosity, a porous carbon material having edges of carbon hexagonal planes located on outer surfaces of particle and structure, and flaky graphite being similar to graphene are produced. (Means to Solve) By subjecting a carbon material, in which a closed-pore-ratio and an amount of remaining hydrogen in the material are set to be within a proper range, to hot isostatic pressing treatment, a vapor phase growth reaction of graphite is generated in closed pores as nuclei using hydrogen and hydrocarbon generated from the carbon material, thereby producing a large amount of targeted porous carbon material at low cost. Flaky graphite being similar to graphene is produced by applying physical impact to the obtained porous carbon material or by generating a graphite intercalation compound using the porous carbon material as a host and then quickly heating the compound.Type: GrantFiled: October 1, 2014Date of Patent: June 28, 2016Assignee: INCUBATION ALLIANCE, INC.Inventors: Kazuo Muramatsu, Masahiro Toyoda
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Patent number: 9267080Abstract: Provided is a carbonization furnace in which disordering of fiber bundles does not occur and there is no lack of uniformity throughout the entire furnace interior, even in the supply of heated inert gas. A carbonization furnace for manufacturing carbon fiber bundles, the furnace being provided with a heat treatment chamber, an inlet sealed chamber and an outlet sealed chamber, a gas spray nozzle, and a conveyance path, wherein: the gas spray nozzle (4) has a double tube structure obtained from a hollow cylindrical inner tube (8) and a hollow cylindrical outer tube (7), and is disposed in a direction that is horizontal and is orthogonal to the fiber bundle conveyance direction; in the outer tube, multiple gas-spraying holes (7a) are disposed across the width of the conveyance path in the longitudinal direction of the outer tube, and the area of the gas-spraying holes of the outer tube is 0.Type: GrantFiled: June 21, 2013Date of Patent: February 23, 2016Assignee: MITSUBISHI RAYON CO., LTD.Inventors: Yusuke Oka, Nobuyuki Yamamoto, Akito Hatayama
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Patent number: 9228276Abstract: Disclosed herein are processes for preparing carbonized polymers, such as carbon fibers, comprising: sulfonating a polymer with a sulfonating agent that comprises SO3 gas to form a sulfonated polymer; treating the sulfonated polymer with a heated solvent, wherein the temperature of said solvent is at least 95° C.; and carbonizing the resulting product by heating it to a temperature of 500-3000° C.Type: GrantFiled: July 3, 2013Date of Patent: January 5, 2016Assignee: Dow Global Technologies LLCInventors: Bryan E. Barton, Zenon Lysenko, Mark T. Bernius, Eric J. Hukkanen
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Patent number: 9045347Abstract: A novel polycrystalline stoichiometric fine SiC fiber substantially free of impurities is produced using a novel pre-ceramic polymer. The pre-ceramic polymer is prepared by reacting a mixture of chlorodisilane, boron trichloride, and a vinyl chlorodisilane with an excess of hexamethyldisilazane to form the pre-ceramic polymer resin, which may then be melt-spun, cured, pyrolyzed and heat-treated to obtain the finished SiC fiber. The manufacturing process for the production of the fine SiC ceramic fiber allows for flexibility with respect to cross-linking, in that low-cost thermal treatments may replace more complex methods, while obtaining fibers with improved materials properties as compared to currently available SiC fibers.Type: GrantFiled: February 28, 2011Date of Patent: June 2, 2015Assignee: General Electric CompanyInventors: Edward J. A. Pope, Christopher L. Hill, Carl N. Brabham, Jerry M. King, Bernard T. Morkunas
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Publication number: 20150128827Abstract: A preparation method for a flame-retardant and corrosion-resistant fiber bamboo substrate comprises the following steps of: 1) cutting raw bamboo into bamboo filaments; 2) flame-retardant treatment: soaking the bamboo filaments prepared in Step 1) in aqueous solution of a flame retardant; 3) drying: drying the flame-retardant treated bamboo filaments at 55° C. to 65° C.; 4) carbonized pyrolysis: feeding the dried bamboo filaments into a carbonized pyrolysis kiln; and 5) sequentially gumming, post-gumming drying, pressing, curing, maintaining and splitting to obtain a bamboo substrate.Type: ApplicationFiled: July 19, 2013Publication date: May 14, 2015Applicant: Wuxi Boda Bamboo and Wood Industrial Co., Ltd. (CN)Inventor: Guoqiang Sun
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Publication number: 20150118141Abstract: Carbon fibers made by a process using an organogel precursor that includes a nucleophilic filler and polyacrylonitrile; such a process which includes dry-jet wet spinning; and an article made from such carbon fibers.Type: ApplicationFiled: October 5, 2012Publication date: April 30, 2015Applicants: NANORIDGE MATERIALS, INCORPORATEDInventor: Christopher Allen Dyke
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Publication number: 20150111449Abstract: We report a method of preparation of highly elastic graphene oxide films, and their transformation into graphene oxide fibers and electrically conductive graphene fibers by spinning. Methods typically include: 1) oxidation of graphite to graphene oxide, 2) preparation of graphene oxide slurry with high solid contents and residues of sulfuric acid impurities. 3) preparation of large area films by bar-coating or dropcasting the graphene oxide dispersion and drying at low temperature. 4) spinning the graphene oxide film into a fiber, and 5) thermal or chemical reduction of the graphene oxide fiber into an electrically conductive graphene fiber. The resulting films and fiber have excellent mechanical properties, improved morphology as compared with current graphene oxide fibers, high electrical conductivity upon thermal reduction, and improved field emission properties.Type: ApplicationFiled: October 21, 2014Publication date: April 23, 2015Inventors: Rodolfo Cruz-Silva, Aaron Morelos, Mauricio Terrones, Ana Laura Elias, Nestor Perea-Lopez, Morinobu Endo
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Publication number: 20150069666Abstract: The present invention relates to carbon nanotube fibers reinforced with a carbon precursor and a method for manufacturing the same. The carbon nanotube fibers reinforced with a carbon precursor according to the present invention are carbonized by the empty space inside the carbon nanotube fibers being filled with a carbon precursor, and therefore, are highly effective in that the mechanical and thermal properties are improved due to effective stress transfer and contact resistance decrease, and these properties are maintained intact even at high temperatures.Type: ApplicationFiled: April 11, 2013Publication date: March 12, 2015Inventors: Young Jin Jeong, Jun Young Song, Dong Hwan Cho, Byung Kuk Kim
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Publication number: 20150053079Abstract: A hollow fiber carbon molecular sieve membrane, a process for preparing the hollow fiber carbon molecular sieve membrane, and a process for effecting separation of an olefin from a gaseous mixture that comprises the olefin in admixture with its corresponding paraffin and optionally one or more gaseous components selected from hydrogen, an olefin other than the olefin and a paraffin other than the corresponding paraffin. The process and membrane may also be used to effect separation of the olefin(s) from remaining feedstream components subsequent to an olefin-paraffin separation.Type: ApplicationFiled: April 29, 2013Publication date: February 26, 2015Applicants: Dow Global Technologies LLC, Georgia Tech Research CorporationInventors: William J. Koros, Liren Xu, Mark K. Brayden, Marcos V. Martinez, Brien A. Stears
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Publication number: 20150035183Abstract: Processes for producing carbon fibre, the filament thereof and pre-oxidized fibre are provided. In one embodiment, the gel spinning of polyacrylonitrile filament is achieved by using small-molecule gelling agent, and the carbon fibre obtained thereby is increased by 15% to 40% in tensile strength and by 20% to 35% in toughness. In another embodiment, the melt spinning process of polyacrylonitrile is conducted by using imidazole type ion liquid as plasticizer, the process reduces environment pollution, is suitable for industrial production and the fibre produced thereby is improved in its strength. In yet another embodiment, polyacrylonitrile pre-oxidized fibre is produced by melt spinning, so low cost and controllable pre-oxidization of polyacrylonitrile can be achieved. In a further embodiment, high strength carbon fibre is manufactured by using polymer thickening agent.Type: ApplicationFiled: October 20, 2014Publication date: February 5, 2015Inventors: Muhuo Yu, Huaiping Rong, Keqing Han, Zhaohua Wang, Yiwei Zhang, Qinli Dong
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Patent number: 8932513Abstract: A method of synthesizing mechanically resilient titanium carbide (TiC) nanofibrous felts comprising continuous nanofibers or nano-ribbons with TiC crystallites embedded in carbon matrix, comprising: (a) electrospinning a spin dope for making precursor nanofibers with diameters less than 0.5 J.Lm; (b) overlaying the nanofibers to produce a nanofibrous mat (felt); and then (c) heating the nano-felts first at a low temperature, and then at a high temperature for making electrospun continuous nanofibers or nano-ribbons with TiC crystallites embedded in carbon matrix; and (d) chlorinating the above electrospun nano-felts at an elevated temperature to remove titanium for producing carbide derived carbon (CDC) nano-fibrous felt with high specific surface areas.Type: GrantFiled: May 29, 2012Date of Patent: January 13, 2015Assignee: South Dakota Board of RegentsInventors: Hao Fong, Lifeng Zhang, Yong Zhao, Zhengtao Zhu
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Publication number: 20140353861Abstract: A method for producing a stabilized lignin fiber from softwood alkaline lignin by heat treatment in the absence of oxidant is disclosed. The stabilized lignin fiber can be further treated to obtain carbon fiber.Type: ApplicationFiled: January 21, 2013Publication date: December 4, 2014Inventors: Elisabeth Sjöholm, Göran Gellerstedt, Rickard Drougge, Ida Norberg
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Patent number: 8865106Abstract: In one embodiment of the disclosure, a composite raw material and a method for forming the same are provided. The method includes sulfonating a polycyclic aromatic compound to form a polycyclic aromatic carbon sulfonate (PCAS); and mixing the polycyclic aromatic carbon sulfonate and a polyacrylonitrile (PAN) to form a composite raw material. In another embodiment of the disclosure, a carbon fiber containing the composite raw material described above and a method for forming the same are provided.Type: GrantFiled: September 13, 2012Date of Patent: October 21, 2014Assignee: Industrial Technology Research InstituteInventors: Tun-Fun Way, Yu-Ting Chen, Jiun-Jy Chen, Hsiao-Chuan Chang
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Publication number: 20140306364Abstract: Method for the preparation of carbon fiber, which comprises: (i) immersing functionalized polyvinyl precursor fiber into a liquid solution having a boiling point of at least 60° C.; (ii) heating the liquid solution to a first temperature of at least 25° C. at which the functionalized precursor fiber engages in an elimination-addition equilibrium while a tension of at least 0.1 MPa is applied to the fiber; (iii) gradually raising the first temperature to a final temperature that is at least 20° C. above the first temperature and up to the boiling point of the liquid solution for sufficient time to convert the functionalized precursor fiber to a pre-carbonized fiber; and (iv) subjecting the pre-carbonized fiber produced according to step (iii) to high temperature carbonization conditions to produce the final carbon fiber. Articles and devices containing the fibers, including woven and non-woven mats or paper forms of the fibers, are also described.Type: ApplicationFiled: April 10, 2013Publication date: October 16, 2014Inventor: UT-Battelle, LLC
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Patent number: 8845938Abstract: A method of manufacturing a polyacrylonitrile fiber includes a spinning process in which a spinning dope including polyacrylonitrile is spun; a first drawing process; a drying process; and a second hot drawing process in this order.Type: GrantFiled: November 28, 2011Date of Patent: September 30, 2014Assignee: Toray Industries, Inc.Inventors: Tomoko Ichikawa, Takashi Ochi, Akira Kishiro, Yasutaka Kato, Takashi Shibata, Masafumi Ise
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Patent number: 8845950Abstract: A method to manufacture a carbon fiber electrode comprises synthesizing polyamic acid (PAA) as a polyimide (PI) precursor from pryomellitic dian hydride (PMDA) and oxydianiline (ODA) as monomers and triethylamine (TEA) as a catalyst, adding dimethylformamide (DMF) to the polyamic acid (PAA) solution to prepare a spinning solution and subjecting the spinning solution to electrostatic spinning at a high voltage to obtain a PAA nanofiber paper, converting the PAA nanofiber paper into a polyimide (PI) nanofiber paper by heating, and converting the polyimide (PI) nanofiber paper into a carbon nanofiber (CNF) paper by heating under an Ar atmosphere. Also, the method to manufacture a polyimide carbon nanofiber electrode and/or a carbon nanotube composite electrode may utilize carbon nanofibers having diameters that are lessened by optimizing electrostatic spinning in order to improve spinnability.Type: GrantFiled: September 3, 2008Date of Patent: September 30, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Dae Wook Park, Hyong Soo Noh, Hideo Nojima, Thi Xuyen Nguyen, Chul Ho Song, Young Hee Lee
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Patent number: 8822029Abstract: A polyacrylonitrile-based polymer which satisfies at least one of [a] to [d]: [a] Z-average molecular weight (Mz) determined by gel-permeation chromatograph is 800,000 to 6,000,000 and degree of polydispersity (Mz/Mw) (Mw denotes weight average molecular weight) is 3.0 to 10.0; [b] Z+1-average molecular weight (Mz+1) determined by GPC method is 3,000,000 to 10,000,000 and degree of polydispersity (Mz+1/Mw) is 6.0 to 25.0; [c] Mzm determined by gel-permeation chromatograph multi-angle laserlight scattering photometry is 400,000 to 1,000,000 and degree of polydispersity (Mzm/Mwm) is 3.0 to 10.0; and [d] Z-average radius of gyration (Rz) determined by gel-permeation chromatograph multi-angle laserlight scattering photometry is 25 to 45 nm and its ratio to weight average radius of gyration (Rz/Rw) is 1.3 to 2.5.Type: GrantFiled: October 15, 2007Date of Patent: September 2, 2014Assignee: Toray Industries, Inc.Inventors: Fumihiko Tanaka, Makoto Endo, Yuuki Okishima
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Patent number: 8808609Abstract: The present invention has an object of providing the carbon fiber (or the nonwoven fabric configured of the aforementioned carbon fiber) of which the surface area, the graphitization degree, and the fiber diameter are large, high, and small, respectively, and yet of which dispersion is small. The method of producing the carbon fiber nonwoven fabric includes a dispersion liquid preparing step of preparing a dispersion liquid containing resin and pitch, an electrospinning step of producing the nonwoven fabric that is comprised of carbon fiber precursors with electrospinning from the aforementioned dispersion liquid, and a modifying step of modifying the carbon fiber precursors of the nonwoven fabric obtained in the aforementioned electrospinning step into the carbon fiber.Type: GrantFiled: September 17, 2010Date of Patent: August 19, 2014Assignees: TEC One Co., Ltd., Shinshu UniversityInventors: Takahiro Kitano, Fujio Okino
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Publication number: 20140219909Abstract: Disclosed is a method of producing a continuous lignin fiber from softwood and/or hardwood alkali lignin. The lignin fiber can be further treated to obtain structural carbon fiber.Type: ApplicationFiled: February 13, 2012Publication date: August 7, 2014Applicant: INNVENTIA ABInventors: Elisabeth Sjoholm, Goran Gellerstedt, Rickard Drougge, Ida Norberg, Ylva Nordstrom
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Publication number: 20140175688Abstract: Making carbon fiber from asphaltenes obtained through heavy oil upgrading. In more detail, carbon fiber is made from asphaltenes obtained from heavy oil feedstocks undergoing upgrading in a continuous coking reactor.Type: ApplicationFiled: December 26, 2012Publication date: June 26, 2014Applicant: Honeywell Federal Manufacturing & Technologies, LLCInventor: Honeywell Federal Manufacturing & Technologies, LLC
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Publication number: 20140151914Abstract: Process for manufacturing carbon fibres, includes a first spinning step of a fibre of PAN precursor and a second oxidation/carbonization step of the fibre and the plant thereof. The spinning and oxidation/carbonization steps are performed directly in line and continuously, and hence without any stocking buffer area of a PAN precursor between the two steps. The spinning step is performed at low speed, so that the output speed from the spinning step, downstream of the stretching operations, is a speed falling within the range of the suitable processing speeds in the subsequent oxidation/carbonization step. Moreover, the spinning step is performed in a modular way on a plurality of spinning modules aligned in one or more rows, each spinning module having a productivity not above 10% of the overall productivity of the spinning step. In any individual spinning module, the fibres downstream of the spinning area follow zig-zag, rectilinear paths.Type: ApplicationFiled: July 17, 2012Publication date: June 5, 2014Inventor: Marco Rovellini