Lignin-based carbon fibers: Carbon nanotube decoration and superior thermal stability

Abstract
Lignin-based carbon fibers (CFs) decorated with carbon nanotubes (CNTs) were synthesized and their structure, thermal stability and wettability were systematically studied. The carbon fiber precursors were produced by electrospinning lignin/polyacrylonitrile solutions. CFs were obtained by pyrolyzing the precursors and CNTs were subsequently grown on the CFs to eventually achieve a CF–CNT hybrid structure. The processes of pyrolysis and CNT growth were conducted in a tube furnace using different conditions and the properties of the resultant products were studied and compared. The CF–CNT hybrid structure produced at 850 °C using a palladium catalyst showed the highest thermal stability, i.e., 98.3% residual weight at 950 °C. A mechanism for such superior thermal stability was postulated based on the results from X-ray diffraction, Raman spectroscopy, scanning and transmission electron microscopy, and electron energy loss spectroscopy analyses. The dense CNT decoration was found to increase the hydrophobicity of the CFs.

Citation
Lignin-based carbon fibers: Carbon nanotube decoration and superior thermal stability 2014, 80:91 Carbon

Publisher
Elsevier BV

Journal
Carbon

DOI
10.1016/j.carbon.2014.08.042

Additional Links
http://linkinghub.elsevier.com/retrieve/pii/S0008622314007829

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