# Wavy Graphene-Like Network Forming during Pyrolysis of Polyacrylonitrile into Carbon Fiber

https://mdr.nims.go.jp/datasets/af7f6219-9d98-47e6-843a-cd107e50a940

## File

- [finalversion.pdf](https://mdr.nims.go.jp/filesets/0c8d7a37-936c-435b-8e58-ba5241b2af42/download) ([Detail](https://mdr.nims.go.jp/filesets/0c8d7a37-936c-435b-8e58-ba5241b2af42.md))

## Id

af7f6219-9d98-47e6-843a-cd107e50a940

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2023-10-06T14:53:59.456072Z

## Updated at

2024-05-29T23:30:08.069648Z

## Published at

2024-05-29T23:30:08.398754Z

## Doi

https://doi.org/10.48505/nims.4246

## First published url

https://doi.org/10.1021/jacs.3c02504

## Date published

2023-06-07

## Recorded date published

2023-6-7

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Wavy Graphene-Like Network Forming during Pyrolysis of Polyacrylonitrile
    into Carbon Fiber
  title_type: original
  lang: en

## Description

- description: 'Carbon fiber (CF) obtained by pyrolysis of polyacrylonitrile (PAN-CF)
    surpasses metals in properties suitable for diverse applications such as the manufacture
    of aircraft and power turbine blades. PAN-CF obtained by pyrolysis at around 1200
    °C shows a remarkably high tensile strength of 7 GPa, much higher than pitch-based
    CF (pb-CF) consisting of piles of pure graphene networks. However, little information
    has been available on the atomistic structure of PAN-CF and on how it forms during
    pyrolysis. We pyrolyzed an acrylonitrile 9-mer in a carbon nanotube, monitored
    the course of the reaction using atomic-resolution electron microscopy, and found
    that this oligomer forms a thermally reactive wavy graphene-like network (WGN)
    at around 1200 °C during slow graphitization taking place between 900 °C and 1800
    °C. Ptychographic microscopic analysis indicated that such material consists of
    5-, 6-, and larger-membered rings; hence is not flat but wavy. During PAN-CF manufacturing,
    many layers of WGN pile up to form a chemically and physically interdigitated
    noncrystalline phase that resists fracture and increases the tensile strength.
    pb-CF using nearly pure carbon starting material, on the other hand, forms a crystalline
    graphene network and is brittle. '
  description_type: abstract
  lang: eng

## Creator

- name: Toru Ishikawa
  role: author
- name: Fumihiko Tanaka
  role: author
- name: Kosuke Kurushima
  role: author
- name: Akira Yasuhara
  role: author
- name: Ryusuke Sagawa
  role: author
- name: Tatsuya Fujita
  role: author
- name: Ryohei Yonesaki
  role: author
- name: Katsuhiko Iseki
  role: author
- name: Takayuki Nakamuro
  role: author
- name: Koji Harano
  role: author
  orcid: https://orcid.org/0000-0001-6800-8023
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Eiichi Nakamura
  role: author

## Contact agent



## Publisher

organization: American Chemical Society (ACS)

## Managing organization



## Keyword

- subject: carbon fiber
  schema: not_defined
- subject: transmission electron microscopy
  schema: not_defined
- subject: pyrolysis
  schema: not_defined
- subject: in situ microscopy
  schema: not_defined

## Rights

- description: This document is the Accepted Manuscript version of a Published Work
    that appeared in final form in Wavy Graphene-Like Network Forming during Pyrolysis
    of Polyacrylonitrile into Carbon Fiber, copyright ©  2023 American Chemical Society
    after peer review and technical editing by the publisher. To access the final
    edited and published work see https://pubs.acs.org/doi/10.1021/jacs.3c02504
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2023-05-30
end_date: 2024-05-30

## Journal

- title: Journal of the American Chemical Society
  issn: '00027863'
  volume: '145'
  issue: '22'
  start_page: 12244
  end_page: 12254

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## Specimen



## Chemical composition



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## Fileset

- id: 0c8d7a37-936c-435b-8e58-ba5241b2af42
  filename: finalversion.pdf
  content_type: application/pdf
  size: 8189443
  md5: 88fa8bcfb7bbbfcacf7ce582a084e9d5

## Thumbnail

fileset_id: 0c8d7a37-936c-435b-8e58-ba5241b2af42
filename: finalversion.pdf