TY - JOUR
T1 - Oxidative stabilization of PAN/SWNT composite fiber
AU - Min, Byung G.
AU - Sreekumar, T. V.
AU - Uchida, Tetsuya
AU - Kumar, Satish
N1 - Funding Information:
This work was supported by office of Naval Research (DURINT grant #N00014-01-1-0657), Air Force Office of Scientific Research (F49620-03-1-0124), and Carbon Nanotechnologies, Inc.
PY - 2005
Y1 - 2005
N2 - PAN/SWNT composite fibers have been spun with 0, 5, and 10 wt% single wall carbon nanotubes (SWNTs). Tensile fracture surfaces of polyacrylonitrile (PAN) fibers exhibited extensive fibrillation, while for PAN/SWNT composite fibers, tendency to fibrillate decreased with increasing SWNT content. The reinforcing effect of SWNTs on the oxidized polyacrylonitrile (PAN) fiber has been studied. At 10wt% SWNTs, breaking strength, modulus, and strain to failure of the oxidized composite fiber increased by 100%, 160%, and 115%, respectively. Tensile fracture surfaces of thermally stabilized PAN and the PAN/SWNT fibers exhibited brittle behavior and well distributed SWNT ropes covered with the oxidized matrix can be observed in the tensile fracture surfaces of the fibers. No de-bonding has been observed between unoxidized or the oxidized PAN matrix and the nanotube ropes. Higher strain to failure of the oxidized composite fiber as compared to that of the oxidized control PAN fiber also suggests good adhesion/ interaction between SWNT and the oxidized matrix. Thermal stresses generated on the composite fiber during the oxidation process were lower than those for the control fiber. The potential of PAN/SWNT composite fiber as the precursor material for the carbon fiber has been discussed.
AB - PAN/SWNT composite fibers have been spun with 0, 5, and 10 wt% single wall carbon nanotubes (SWNTs). Tensile fracture surfaces of polyacrylonitrile (PAN) fibers exhibited extensive fibrillation, while for PAN/SWNT composite fibers, tendency to fibrillate decreased with increasing SWNT content. The reinforcing effect of SWNTs on the oxidized polyacrylonitrile (PAN) fiber has been studied. At 10wt% SWNTs, breaking strength, modulus, and strain to failure of the oxidized composite fiber increased by 100%, 160%, and 115%, respectively. Tensile fracture surfaces of thermally stabilized PAN and the PAN/SWNT fibers exhibited brittle behavior and well distributed SWNT ropes covered with the oxidized matrix can be observed in the tensile fracture surfaces of the fibers. No de-bonding has been observed between unoxidized or the oxidized PAN matrix and the nanotube ropes. Higher strain to failure of the oxidized composite fiber as compared to that of the oxidized control PAN fiber also suggests good adhesion/ interaction between SWNT and the oxidized matrix. Thermal stresses generated on the composite fiber during the oxidation process were lower than those for the control fiber. The potential of PAN/SWNT composite fiber as the precursor material for the carbon fiber has been discussed.
KW - A. Carbon fibers, Carbon nanotubes, Carbon precursor
KW - B. Oxidation
UR - http://www.scopus.com/inward/record.url?scp=10844296633&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=10844296633&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2004.10.034
DO - 10.1016/j.carbon.2004.10.034
M3 - Article
AN - SCOPUS:10844296633
SN - 0008-6223
VL - 43
SP - 599
EP - 604
JO - Carbon
JF - Carbon
IS - 3
ER -