A. Martinezalonso et al., MICROPOROUS TEXTURE OF ACTIVATED CARBON-FIBERS PREPARED FROM ARAMID FIBER PULP, Microporous materials, 11(5-6), 1997, pp. 303-311
Kevlar(R) (poly(p-phenylene terephthalamide), PPD-T) pulp was used for
the first time as a feedstock to prepare activated carbon fibers (ACF
s). These were obtained by pyrolysis to 1173 K under inert (Ar) atmosp
here and subsequent activation with carbon dioxide at two different te
mperatures (1023 and 1073 K). The resulting ACFs were characterized by
adsorption of N-2 (77 K) and CO2 (273 K). The surface area and pore v
olume increased after pyrolysis and especially after CO2 activation, r
eaching maxima around 60% burn-off. It is concluded that Kevlar pulp c
onstitutes a suitable feedstock for preparing microporous ACFs having
a narrow pore size distribution, which is closely associated with the
crystalline character of the precursor. (C) 1997 Elsevier Science B.V.