TY - JOUR
T1 - Shortening stabilization time using pressurized air flow in manufacturing mesophase pitch-based carbon fiber
AU - Shimanoe, Hiroki
AU - Ko, Seunghyun
AU - Jeon, Young Pyo
AU - Nakabayashi, Koji
AU - Miyawaki, Jin
AU - Yoon, Seong Ho
N1 - Funding Information:
This work was supported by the Technology Innovation Program (10082582, Development of petroleum-based high quality mesophase pitch and high yield mesophase pitch for premium carbon materials) funded by the Ministry of Trade, Industry, & Energy (MOTIE, Korea).
Funding Information:
Funding: This work was supported by the Technology Innovation Program (10082582, Development of petroleum-based high quality mesophase pitch and high yield mesophase pitch for premium carbon materials) funded by the Ministry of Trade, Industry, & Energy (MOTIE, Korea).
Publisher Copyright:
© 2019 by the authors.
PY - 2019/12/1
Y1 - 2019/12/1
N2 - Oxidation-stabilization using pressurized air flows of 0.5 and 1.0 MPa could successfully shorten the total stabilization time to less than 60 min for manufacturing mesophase pitch-based carbon fibers without deteriorating mechanical performance. Notably, the carbonized fiber heat-treated at 1000 °C for 30 min, which was oxidative-stabilized at 260 °C without soaking time with a heating rate of 2.0 °C/min using 100 mL/min of pressurized air flow of 0.5 MPa (total stabilization time: 55 min), showed excellent tensile strength and Young0s modulus of 3.4 and 177 GPa, respectively, which were higher than those of carbonized fiber oxidation-stabilized at 270 °C without soaking time with a heating rate of 0.5 °C/min using 100 mL/min of atmospheric air flow (total stabilization time: 300 min). Activation energies for oxidation reactions in stabilization using pressurized air flows were much lower than those of oxidation reactions using atmospheric air flow because of the higher oxidation diffusion from the outer surface into the center part of pitch fibers for the use of the pressurized air flows of 0.5 and 1.0 MPa than the atmospheric one. The higher oxygen diffusivities resulted in a more homogeneous distribution of oxygen weight uptake across the transverse section of mesophase pitch fibers, and allowed the improvement of the mechanical properties.
AB - Oxidation-stabilization using pressurized air flows of 0.5 and 1.0 MPa could successfully shorten the total stabilization time to less than 60 min for manufacturing mesophase pitch-based carbon fibers without deteriorating mechanical performance. Notably, the carbonized fiber heat-treated at 1000 °C for 30 min, which was oxidative-stabilized at 260 °C without soaking time with a heating rate of 2.0 °C/min using 100 mL/min of pressurized air flow of 0.5 MPa (total stabilization time: 55 min), showed excellent tensile strength and Young0s modulus of 3.4 and 177 GPa, respectively, which were higher than those of carbonized fiber oxidation-stabilized at 270 °C without soaking time with a heating rate of 0.5 °C/min using 100 mL/min of atmospheric air flow (total stabilization time: 300 min). Activation energies for oxidation reactions in stabilization using pressurized air flows were much lower than those of oxidation reactions using atmospheric air flow because of the higher oxidation diffusion from the outer surface into the center part of pitch fibers for the use of the pressurized air flows of 0.5 and 1.0 MPa than the atmospheric one. The higher oxygen diffusivities resulted in a more homogeneous distribution of oxygen weight uptake across the transverse section of mesophase pitch fibers, and allowed the improvement of the mechanical properties.
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U2 - 10.3390/polym11121911
DO - 10.3390/polym11121911
M3 - Article
AN - SCOPUS:85079096566
VL - 11
JO - Polymers
JF - Polymers
SN - 2073-4360
IS - 12
M1 - 1911
ER -