Preparation of carbon fibers from Hyper Coal solution and their surface characteristics

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  • ハイパーコール溶液からの炭素繊維の調製とその表面特性
  • ハイパーコール ヨウエキ カラ ノ タンソ センイ ノ チョウセイ ト ソノ ヒョウメン トクセイ

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Abstract

<p>Carbon fibers were prepared from a solution of ash-free coal (Hyper Coal; HPC), which was obtained by thermal-extraction from coal. The HPC used as a raw material was soluble in organic solvents, providing viscous and conductive solutions. Carbon precursor fibers were prepared by electro-spinning from a HPC/pyridine solution followed by carbonization at 900 °C. The carbon fibers were obtained as non-woven sheets. Evaluation of the pore structure of the resulting carbon fiber sheets based on Ar gas adsorption/desorption measurements showed that they contained a large number of ultrafine micropores (< 0.70 nm) without any activation treatment. It was also possible to obtain carbon fibers by thermal melting of the HPC, but in that case no pores were observed. Hence, carbon fibers with pores were obtained without any activation treatment only if they were prepared by electro-spinning from an organic solution of the HPC. These results indicate that we have developed a new preparation method for microporous carbon fibers without an additional activation process.</p>

Journal

  • TANSO

    TANSO 2020 (294), 106-112, 2020-09-01

    THE CARBON SOCIETY OF JAPAN

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