Analysis of spinnable mesophase pitch in terms of lyotropic liquid crystalline solution

Takashi Mashio, Taisei Tomaru, Hiroki Shimanoe, Seung Jae Ha, Young Pyo Jeon, Koji Nakabayashi, Jin Miyawaki, Seong Ho Yoon

研究成果: ジャーナルへの寄稿学術誌査読

1 被引用数 (Scopus)

抄録

Mesophase pitch is a unique graphitizable material that has been used as an important precursor for highly graphitic carbon materials. In the current study, we propose to consider a spinnable mesophase pitch as a lyotropic liquid crystalline solution composed of solvent components and liquid crystalline components, so-called mesogen or mesogenic components. Among mesophase pitches, the supermesophase pitch is defined as a mesohpase pitch with 100% anisotropy, and can only be observed in pitches with a proportion of mesogenic components exceeding the threshold concentration (TC). We also examined the critical limit of AR synthetic pitch and 5 experimental spinnable mesophase pitches (SMPs). Then, we examined the effect of the solvent component on the minimum required amount of mesogenic component using a selected solvent component instead of their own solvent components. AR pitch showed 100% anisotropy with the least amount of its mesogenic component, THF insoluble components, of 60 wt.%. The solvent component, THF soluble components, extracted from AR-pitch, which has a molecular weight pattern similar to that of the original material but more amount of naphthenic alkyl chains, showed better solvent functionality than those of other THF solubles (THFSs) from other as-prepared spinnable mesophase pitches. This is why a lower amount of AR THFS can produce a supermesophase pitch when combined with the THFI (mesogenic components) of other experimental mesophase pitches. As a result of the current analysis, we define the mesogens as molecules that not only readily stack, but also maintain stacking structures in a fused state in the solution. The solvent component, on the other hand, is defined as molecules with a structure that readily decomposes in a fused state in the solution.

本文言語英語
ページ(範囲)713-726
ページ数14
ジャーナルCarbon Letters
33
3
DOI
出版ステータス出版済み - 5月 2023

!!!All Science Journal Classification (ASJC) codes

  • セラミックおよび複合材料
  • 再生可能エネルギー、持続可能性、環境
  • エネルギー工学および電力技術
  • プロセス化学およびプロセス工学
  • 有機化学
  • 無機化学
  • 材料化学

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