An inexpensive and general-purpose carbon fiber was prepared using coal tar pitch. In contrast to the solvent extraction process employing expensive solvents, a low-cost centrifugal separation method facilitated the reduction of loss due to the pitch purification and an overall yield increase. The coal tar pitch purified by centrifugation and subsequently co-carbonized with pyrolysis fuel oil improved in spinnability. Moreover, the resulting spinnable pitch had a softening point of 250◦C. The obtained carbon fibers were heat-treated at 1000◦C for 5 min, resulting in a tensile strength of approximately 1000 MPa and an average diameter of 9 µm. In this study, we present an effective method for obtaining low-cost general-purpose isotropic carbon fibers.
|Publication status||Published - 2021 Nov 1|
Bibliographical noteFunding Information:
This work was supported by the Technology Innovation Program (or Industrial Strategic Technology Development Program: synthetic graphite development project) (20006832, developed carbon-graphite material for coke-based chemical and heat-resistant self-lubricating machine structure), funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea).
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics