Synthesis and characterization of activated carbon fibers from Kevlar

• Main Authors: Liliana Giraldo, Yolanda Ladino, J. C M. Pirajánc, M. P. Rodríguez
• Format: Article
• Language: English
• Published: Universidade Estadual Paulista 2018-09-01
• Series: Eclética Química
• Online Access: https://revista.iq.unesp.br/ojs/index.php/ecletica/article/view/1005

Kevlar [poly (p-phenilylene terephtalamide)], was used as a precursor in the preparation of acti- vated carbon fibers. For this intention, physical and chemical activations were carried out. Activated fibers were physically prepared from the carbonization of the Kevlar and its later activation with CO 2 and steam of water, by the other hand; the chemically activated fibers were obtained by means of the impregnation of the material with phosphoric acid and their later carbonization. Different conditions were used and preliminary analyses of the precursor were taken into account (TGA-DTA / IR). The resulting fibers were characterized by N 2 (77K) adsorption, infrared spectroscopy, SEM, and immersion calorimetry. Yields and Burn off were also evaluated. The results shows that if you want to synthesize activated carbon fibers from Kevlar strong conditions respect to the commonly used such as water steam, high phosphoric acid concentrations and meth- ods of impregnation are the ones who allows the development of optimal surface areas and pore volumes.