| 초록 |
In this study, low-density polyethylene (LDPE)-derived activated carbon fibers (PE-ACF) were prepared by techniques of cross-linking, carbonization, and subsequent steam activation under various conditions. The surface morphologies and structural characteristics of the PE-ACF were observed by field-emission scanning electron microscope and X-ray diffraction analysis, respectively. The nitrogen adsorption-desorption isotherm characteristics were confirmed by Brunauer–Emmett–Teller, nonlocal density functional theory, and Barrett–Joyner–Halenda equations at 77K. The specific surface area and total pore volume of the activated samples increased with increasing the activation time and were found to be increased finally to 1750 m2/g and 0.99 cm3/g, respectively. The PE-ACF also exhibited a high mesopore volume ratio of 39%. This mesopore-rich characteristic of the ACF is considered to be originated from the cross-linking density and crystallite formation of the polymer precursors. |
