TY - JOUR
T1 - Lignin-based carbon fibers: Carbon nanotube decoration and superior thermal stability
AU - Xu, Xuezhu
AU - Zhou, Jian
AU - Jiang, Long
AU - Lubineau, Gilles
AU - Payne, Scott A.
AU - Gutschmidt, David
N1 - KAUST Repository Item: Exported on 2020-10-01
PY - 2014/8/23
Y1 - 2014/8/23
N2 - 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.
AB - 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.
UR - http://hdl.handle.net/10754/558858
UR - http://linkinghub.elsevier.com/retrieve/pii/S0008622314007829
UR - http://www.scopus.com/inward/record.url?scp=84920456376&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2014.08.042
DO - 10.1016/j.carbon.2014.08.042
M3 - Article
SN - 0008-6223
VL - 80
SP - 91
EP - 102
JO - Carbon
JF - Carbon
IS - 1
ER -