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Molecular structure effects of the pitches on preparation of activated carbon fibers from electrospinning

  • Kim, Bo-Hye (Alan G. MacDiarmid Energy Research Institute, Chonnam National University) ;
  • Wazir, Arshad Hussain (Alan G. MacDiarmid Energy Research Institute, Chonnam National University) ;
  • Yang, Kap-Seung (Alan G. MacDiarmid Energy Research Institute, Chonnam National University) ;
  • Bang, Yun-Hyuk (R&D Business Labs, Hyosung Corporation) ;
  • Kim, Sung-Ryong (R&D Business Labs, Hyosung Corporation)
  • Received : 2011.02.25
  • Accepted : 2011.03.25
  • Published : 2011.06.30
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Abstract

Two pitches with different average molecular structures were electrospun and compared in terms of the properties of their fibers after oxidative stabilization, carbonization, and activation. The precursor with a higher molecular weight and greater content of aliphatic groups (Pitch A) resulted in better solubility and spinnability compared to that with a lower molecular weight and lower aliphatic group content (Pitch B). The electrical conductivity of the carbon fiber web from Pitch A of 67 S/cm was higher than that from Pitch B of 52 S/cm. The carbon fiber web based on Pitch A was activated more readily with lower activation energy, resulting in a higher specific surface area compared to the carbon fiber based on Pitch B (Pitch A, 2053 $m^2/g$; Pitch B, 1374 $m^2/g$).

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References

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