Journal of Textile Science & Engineering

Yutaka Kawahara

Publications

• Research Article
  Direct Carbonization of High-performance Aromatic Polymers and the Production of Activated Carbon Fibers
  Author(s): Yutaka Kawahara, Shunsuke Otoyama, Kazuyoshi Yamamoto, Hiroyuki Wakizaka, Yutaka Shinahara, Hideki Hoshiro, Noboru Ishibashi and Norio IwashitaYutaka Kawahara, Shunsuke Otoyama, Kazuyoshi Yamamoto, Hiroyuki Wakizaka, Yutaka Shinahara, Hideki Hoshiro, Noboru Ishibashi and Norio Iwashita
  
  For expanding the utilization of several high-performance aromatic polymeric fibers, e.g., poly p-phenylene benzobisoxazole (PBO, Zylon®), poly p-phenylene terephthalamide (PTA, Kevlar 29®), and polyarylate (PA, Vectran®), direct carbonizing and graphitizing behaviors have been investigated. The PBO-based carbon fiber showed a typical radial texture on its fracture surface, and the graphitization degree (P1) reached 0.35 and crystallite sizes of Lc(002), La(110) after graphitization exceeded 30 nm. On the other hand, the P1 indices of the graphitized carbon fibers from PTA and PA were no more than 0.15. However, a low P1 value is preferable for the production of activated carbon fibers (ACF). In addition, on the surface of the PA-based carbon fibers produced at 900°C, some fine mesh-like morphologies were observed indicating the formation of a porous carbon structu.. Read More»
  DOI: 10.4172/2165-8064.1000219

  Abstract PDF