# Exfoliation Behavior of Large Anionic Graphite Flakes in Liquid Produced by Salt-Assisted Ball Milling

https://mdr.nims.go.jp/datasets/9b638a20-0f4c-413e-83b3-30a942679e58

## File

- [Exfloation Behavior of Large Anionic Graphite Flakes in Liquid Produced by Salt-Assisted Ball Milling.pdf](https://mdr.nims.go.jp/filesets/54f9fe20-9803-41c2-b50e-35d58d087474/download) ([Detail](https://mdr.nims.go.jp/filesets/54f9fe20-9803-41c2-b50e-35d58d087474.md))

## Id

9b638a20-0f4c-413e-83b3-30a942679e58

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2023-11-17T06:07:01.607895Z

## Updated at

2024-01-05T13:12:54.703948Z

## Published at

2023-11-28T04:30:30.856557Z

## Doi



## First published url

https://doi.org/10.3390/pr8010028

## Date published

2019-12-24

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Exfoliation Behavior of Large Anionic Graphite Flakes in Liquid Produced
    by Salt-Assisted Ball Milling
  title_type: original
  lang: en

## Description

- description: Functionalization of graphite is crucial for efficient and effective
    exfoliation to graphene. When negative charges are fixed to the edges of natural
    graphite, the resulting anionic graphite shows negative charging in a polar solvent.
    This enhanced negative charging is assumed to contribute the exfoliation of graphite
    during liquid-phase exfoliation (LPE). In this study, we prepared large anionic
    graphite flakes (~10 μm) by salt-assisted ball milling, as well as natural graphite
    flakes of the same size for comparison. During the LPE process, centrifugation
    speed and solvent type have dominant effects on graphene concentration and quality
    (e.g., size and thickness), so we investigated these factors for anionic graphite
    flakes in detail. The anionic graphite showed higher exfoliation efficiency in
    every type of solvent (isopropanol, methyl ethyl ketone, acetone, and water-based
    cosolvent) compared with the natural graphite. Monolayer graphene, with an average
    size of 80–200 nm, was obtained with relatively high yield (>10%) at only 3 min
    of sonication. The small size of graphene was due to edge fragmentation during
    the LPE process. The recyclability of the sediment and the characterization of
    the exfoliated powders for anionic graphene were also investigated.
  description_type: abstract
  lang: eng

## Creator

- name: Yoshihiko Arao
  role: author
- name: Jonathon D. Tanks
  role: author
  orcid: https://orcid.org/0000-0002-0232-8240
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Kojiro Aida
  role: author
- name: Masatoshi Kubouchi
  role: author

## Contact agent



## Publisher

organization: MDPI AG

## Managing organization



## Keyword

- subject: Graphene
  schema: not_defined
- subject: Liquid phase exfoliation
  schema: not_defined
- subject: Graphite structure
  schema: not_defined
- subject: Characterization
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Processes
  issn: '22279717'
  volume: '8'
  issue: '1'
  start_page: 28
  end_page: 28

## Conference



## Related item



## Funding

- identifier: Grant-in-Aid for Scientific Research (KAKENHI)
  funder_name: JSPS

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



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## Custom property



## Fileset

- id: 54f9fe20-9803-41c2-b50e-35d58d087474
  filename: Exfloation Behavior of Large Anionic Graphite Flakes in Liquid Produced
    by Salt-Assisted Ball Milling.pdf
  content_type: application/pdf
  size: 4938302
  md5: 0b9c041f624c850378caf9a97803b397

## Thumbnail

fileset_id: 54f9fe20-9803-41c2-b50e-35d58d087474
filename: Exfloation Behavior of Large Anionic Graphite Flakes in Liquid Produced
  by Salt-Assisted Ball Milling.pdf