| 摘要 |
PURPOSE:To obtain activated carbonaceous fiber having large surface area from fine carbon fibers prepd. by the vapor deposition process by oxidizing the surface of specified carbonaceous fiber having graphite layers arranged to the growth ring arrangement in parallel to the longitudinal axis. CONSTITUTION:The activated carbonaceous fiber is prepd. by oxidizing the surface of carbonaceous fiber having uniform diameter between 0.01 and 4mum and >=20 ratio of the fiber length to fiber dia. wherein the carbon layers consisting of graphite or easily convertible to graphite are arranged to growth ring arrangement in parallel to the longitudinal axis. The activated carbonaceous fiber has 500-3,000m<2>/g surface area. If the ratio of the fiber length to the fiber dia. is <20, sufficient bonding is not obtd. when the fibers are aggregated resulting deterioration of preferred properties. If the surface area is <500m<2>/g, sufficient adsorptivity is not obtd. and if it is >3,000m<2>/g, the preparation becomes difficult.
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