Porous structure of polyarylamide-based activated carbon fibres
1996; Elsevier BV; Volume: 34; Issue: 10 Linguagem: Inglês
10.1016/0008-6223(96)00088-7
ISSN1873-3891
AutoresFritz Stoeckli, Teresa A. Centeno, Antonio B. Fuertes, Jesús Muñiz,
Tópico(s)Fiber-reinforced polymer composites
ResumoActivated carbons were prepared from two polyarylamide fibres (Kevlar and Nomex) by carbonization and subsequent steam activation to 25 and 50% burn-off. The porous structure of the carbons has been investigated by physical adsorption of CH2Cl2 and N2O at 293 K and immersion calorimetry into liquids of different molecular dimensions. The activated fibres have good sorptive capacities and relatively narrow micropores. The materials resulting from activation at low degrees of burn-off could therefore be of great interest in gas separation, owing to their molecular-sieve properties. Compared to industrial activated carbons, the fibres are hydrophilic and have small external surface areas.
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