Preparation and Characterization of Chemical Activated Fibers on Various Carbon Fibers

Abstract:

OXI-PAN fibers, Kynol fibers, and rayon fibers were used as precursors for the preparation of activated carbon fibers (ACFs) by chemical activation with KOH at 800°C. The effects of different precursor fibers and fiber/KOH ratios on the final ACFs are discussed. The precursor fibers used were appropriate for the ACFs in a single stage pyrolysis process. The OXI-PAN fibers, which were activated with KOH of 2.0M, showed a specific surface area of 2328m2/g, however, lost the fiber shape because of low yields. The Kynol fibers and Rayon fibers showed the high yields, but lower specific surface areas of 900m2/g and 774m2/g, respectively, at KOH of 1.5M. The OXI-PAN fibers, which were activated with KOH of 1.5M, have a specific surface area of 1028m2/g and higher micro-pore volumes and lower yields rather than Kynol-1.5 and Rayon-1.5 samples. This phenomenon is attributed to higher chemical resistance of the Kynol and Rayon fibers rather than OXI-PAN fibers. However, the Kynol fibers were the best precursors on KOH activation at 800°C when carbon yields, surface areas, and micropore volumes are condisered.

• Periodical: Materials Science Forum (Volumes 510-511)
• Pages: 314-317
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.510-511.314
• Online since: March 2006
• Authors: Sook Young Moon, Myung Soo Kim, Yun Soo Lim
• Keywords: Activated Carbon Fiber (ACF), Chemical Activation, Kynol Fibers, OXI-PAN Fibers, Rayon Fibers

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