Abstract
The unique properties of graphitic carbons have gained widespread attention towards their development and application. Carbon materials can be synthesized by thermal decomposition and, more specifically, carbon pyrolysis from polymer precursors. The paper shows the pyrolysis process of polyacrylonitrile (PAN) in the presence of multi-walled carbon nanotubes (MWCNTs) according to different manufacturing process conditions. The electrospinning process of the PAN-MWCNTs solution on multi-plates collectors was firstly analyzed. The morphology and the particles arrangement of the electrospun fibers was studied under scanning and transmission electron microscopes. Moreover, the composite fibrous mats were characterized by RAMAN spectroscopy to identify the effects of a mechanical tension application during the thermal stabilization phase performed before the pyrolysis treatment to obtain carbon fibers from the precursor polymer. The results show that the graphitization of the pyrolyzed fibers is enhanced by the combination of MWCNTs and a mechanical stress applied during the thermal treatment.
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Acknowledgments
The authors would like to acknowledge the support and the assistance of Prof. Marc Madou, Dr. Sunny Holmberg, Dr. Arnoldo Salazar at University of California Irvine and the technical assistance of Dr. Michele Norbis.
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Ginestra, P.S., Ceretti, E. Stress-induced stabilization of pyrolyzed polyacrylonitrile and carbon nanotubes electrospun fibers. Int J Adv Manuf Technol 108, 117–127 (2020). https://doi.org/10.1007/s00170-020-05348-0
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DOI: https://doi.org/10.1007/s00170-020-05348-0