TY - JOUR
T1 - Effects of high-temperature thermal annealing on properties of aligned multi-walled carbon nanotube sheets and their composites
AU - Huu Nam, Tran
AU - Goto, Ken
AU - Shimamura, Yoshinobu
AU - Inoue, Yoku
AU - Yamamoto, Go
AU - Shirasu, Keiichi
AU - Hashida, Toshiyuki
N1 - Funding Information:
We appreciate the financial support from the Japan Science and Technology Agency (JST) through the Advanced Low Carbon Technology Research and Development Program (ALCA) and the Institute of Space and Astronautical Science (ISAS) through the ISAS strategic development fund for space engineering.
Publisher Copyright:
© 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2020/6/2
Y1 - 2020/6/2
N2 - Aligned multi-walled carbon nanotube (MWCNT) sheets were thermally annealed at high temperatures of 1800°C, 2200°C, and 2600°C. Pristine and thermally annealed MWCNT/epoxy composites were fabricated using hot-melt prepreg processing. Effects of thermal annealing on properties of aligned MWCNT sheets and their composites were examined. Transmission electron microscope images and Raman spectra measurements of the aligned MWCNT sheets showed an improvement of the MWCNT nanostructure after high-temperature thermal annealing. High-temperature thermal annealing did not cause the change in microstructural morphologies of the MWCNT sheets. Although the strength of the MWCNT sheets after high-temperature thermal annealing did not improve, their stiffness enhanced significantly. Particularly, high-temperature thermal annealing increased markedly both the tensile strength and elastic modulus of the aligned MWCNT/epoxy composites. The enhancement in the tensile strength and elastic modulus of the composites is mainly attributed to significant improvement of the MWCNT nanostructure by high-temperature thermal annealing. Generally, high-temperature thermal annealing improved the stiffness of the aligned MWCNT sheets and their composites considerably.
AB - Aligned multi-walled carbon nanotube (MWCNT) sheets were thermally annealed at high temperatures of 1800°C, 2200°C, and 2600°C. Pristine and thermally annealed MWCNT/epoxy composites were fabricated using hot-melt prepreg processing. Effects of thermal annealing on properties of aligned MWCNT sheets and their composites were examined. Transmission electron microscope images and Raman spectra measurements of the aligned MWCNT sheets showed an improvement of the MWCNT nanostructure after high-temperature thermal annealing. High-temperature thermal annealing did not cause the change in microstructural morphologies of the MWCNT sheets. Although the strength of the MWCNT sheets after high-temperature thermal annealing did not improve, their stiffness enhanced significantly. Particularly, high-temperature thermal annealing increased markedly both the tensile strength and elastic modulus of the aligned MWCNT/epoxy composites. The enhancement in the tensile strength and elastic modulus of the composites is mainly attributed to significant improvement of the MWCNT nanostructure by high-temperature thermal annealing. Generally, high-temperature thermal annealing improved the stiffness of the aligned MWCNT sheets and their composites considerably.
KW - Carbon nanotubes
KW - heat treatment
KW - mechanical properties
KW - nanocomposites
KW - surface modification
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U2 - 10.1080/09276440.2019.1670000
DO - 10.1080/09276440.2019.1670000
M3 - Article
AN - SCOPUS:85073992871
SN - 0927-6440
VL - 27
SP - 569
EP - 586
JO - Composite Interfaces
JF - Composite Interfaces
IS - 6
ER -