Carbon material precursor and method for producing carbon material using the same
US-2018148563-A1 · May 31, 2018 · US
Stabilized fiber, method of producing the same, and method of producing carbon fiber
US11702769B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11702769-B2 |
| Application number | US-202017019526-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 14, 2020 |
| Priority date | Sep 19, 2019 |
| Publication date | Jul 18, 2023 |
| Grant date | Jul 18, 2023 |
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Abstract
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A method of producing a stabilized fiber, including performing a heat treatment on an acrylamide polymer fiber under an oxidizing atmosphere in a stabilization treatment temperature range of 200° C. to 500° C. while applying a tension of 0.07 mN/tex to 15 mN/tex.
First claim
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What is claimed is: 1. A method of producing a stabilized fiber, comprising performing a heat treatment on an acrylamide polymer fiber under an oxidizing atmosphere in a stabilization treatment temperature range of 200° C. to 500° C. while applying a tension of 0.07 mN/tex to 15 mN/tex, wherein the heat treatment is performed until an intensity ratio of a G peak near 1,590 cm −1 to a D peak near 1,360 cm −1 in a Raman spectrum on a side of the acrylamide polymer fiber becomes 0.5 or more, wherein an acrylamide polymer used in the acrylamide polymer fiber is a homopolymer of an acrylamide monomer or a copolymer of an acrylamide monomer and other polymerizable monomers in which a content of the acrylamide monomer unit in the copolymer is 50 mol % or more. 2. A method of producing a carbon fiber, comprising: producing the stabilized fiber using the method according to claim 1 ; and performing carbonization on the stabilized fiber. 3. A method of producing a stabilized fiber, comprising, performing a heat treatment on an acrylamide polymer fiber under an oxidizing atmosphere in a stabilization treatment temperature range of 200° C. to 500° C. while applying a tension of 0.07 mN/tex to 15 mN/tex wherein the heat treatment is performed until a density of the acrylamide polymer fiber becomes 1.35 g/cm 3 to 1.75 g/cm 3 , wherein an acrylamide polymer used in the acrylamide polymer fiber is a homopolymer of an acrylamide monomer or a copolymer of an acrylamide monomer and other polymerizable monomers in which a content of the acrylamide monomer unit in the copolymer is 50 mol % or more. 4. A method of producing a carbon fiber, comprising: producing the stabilized fiber using the method according to claim 3 ; and performing carbonization on the stabilized fiber. 5. A stabilized fiber which is derived from an acrylamide polymer and has an intensity ratio of 0.5 or more of a G peak near 1,590 cm −1 to a D peak near 1,360 cm −1 in a Raman spectrum on the side of the fiber, wherein the acrylamide polymer is a homopolymer of an acrylamide monomer or a copolymer of an acrylamide monomer and other polymerizable monomers in which a content of the acrylamide monomer unit in the copolymer is 50 mol % or more. 6. A method of producing a carbon fiber, comprising performing carbonization on the stabilized fiber according to claim 5 . 7. A stabilized fiber which is derived from an acrylamide polymer and has a density of 1.35 g/cm 3 to 1.75 g/cm 3 , wherein the acrylamide polymer is a homopolymer of an acrylamide monomer or a copolymer of an acrylamide monomer and other polymerizable monomers in which a content of the acrylamide monomer unit in the copolymer is 50 mol % or more. 8. A method of producing a carbon fiber, comprising performing carbonization on the stabilized fiber according to claim 7 .
Assignees
Inventors
Classifications
- D01F9/225Primary
from stabilised polyacrylonitriles · CPC title
Carbon (carbon nanotubes C04B14/026) · CPC title
Carbon; Pitch · CPC title
- D01F9/21Primary
from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title
- D01D10/02Primary
Heat treatment (heating for finishing D02J13/00) · CPC title
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- What does patent US11702769B2 cover?
- A method of producing a stabilized fiber, including performing a heat treatment on an acrylamide polymer fiber under an oxidizing atmosphere in a stabilization treatment temperature range of 200° C. to 500° C. while applying a tension of 0.07 mN/tex to 15 mN/tex.
- Who is the assignee on this patent?
- Toyota Motor Co Ltd, Toyota Chuo Kenkyusho Kk
- What technology area does this patent fall under?
- Primary CPC classification D01F9/225. Mapped technology areas include Textiles & Paper.
- When was this patent published?
- Publication date Tue Jul 18 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).