Whiskerization of carbon beads by vapor phase growth of carbon fibers to obtain sea urchin-type particles
✍ Scribed by Makoto Egashira; Hiroaki Katsuki; Yasuki Ogawa; Shohachi Kawasumi
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 683 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0008-6223
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✦ Synopsis
Whiskerization of sulfur-containing hard carbon beads with carbon fibers has been examined to prepare sea urchin-type particles. Propylene was used as a source material for the fiber growth and decomposed at 1000°C for 2 hr. Sulfur-catalyzed carbon fibers 4-6 pm in diameter and 90-120 km long formed with a density of 400-550 per bead on the surfaces of carbon beads containing s 2.5 wt% sulfur. These beads were prepared by carbonization of styrene/divinylbenzene copolymers sulfonated with fuming sulfuric acid. Very few, if any, fibers grew on beads from copolymers suIfonated with chlorosulfuric acid, probably because of lower sulfur contents (<2.S wt%) and/or inhibition by residual chlorine.