TY - JOUR
T1 - High-efficiency and wide-bandwidth microwave absorbers based on MoS2-coated carbon fiber
AU - Zhang, Weidong
AU - Zhang, Xue
AU - Zhu, Qing
AU - Zheng, Yuan
AU - Liotta, Leonarda Francesca
AU - Wu, Hongjing
N1 - Publisher Copyright:
© 2020 Elsevier Inc.
PY - 2021/3/15
Y1 - 2021/3/15
N2 - Carbon fiber (CF) is a significant multifunction material, which is extensively used in aircraft because of its superb performance. However, its microwave absorption properties (MAPs) are seriously restricted as a result of the impedance mismatch issue. To address this issue, an efficient strategy is conducted by a series of CF@MoS2 and CF@MoS2@Fe3O4 composites that are fabricated by in-situ grown MoS2 nanosheets (MoS2-NS) and Fe3O4 nanoparticles (Fe3O4-NPs) on the surface of CF. The results of microwave absorption performance (MAP) reveal that the minimum reflection loss (RL) can reach −21.4 dB with a CF@MoS2 composite coating thickness of 3.8 mm; the effective attenuation bandwidth (RL < −10 dB, i.e., 90% microwave energy is attenuated) is up to 10.85 GHz (7.15–18.0 GHz). From a detailed analysis, it is observed impedance mismatch is the critical limiting factor for MAPs rather than attenuation. Furthermore, for CF@MoS2@Fe3O4, the MAP is strongly dependent on the level of coating of magnetic Fe3O4-NPs on the surface of CF@MoS2 composites. The mechanisms underlying the superb MAP and related phenomena are investigated, opening new directions for fabricating CF-based microwave absorbers with high efficiency and wide-bandwidth. Finally, the occurrence of multi-reflection phenomena of EM waves in absorbers are critically analyzed.
AB - Carbon fiber (CF) is a significant multifunction material, which is extensively used in aircraft because of its superb performance. However, its microwave absorption properties (MAPs) are seriously restricted as a result of the impedance mismatch issue. To address this issue, an efficient strategy is conducted by a series of CF@MoS2 and CF@MoS2@Fe3O4 composites that are fabricated by in-situ grown MoS2 nanosheets (MoS2-NS) and Fe3O4 nanoparticles (Fe3O4-NPs) on the surface of CF. The results of microwave absorption performance (MAP) reveal that the minimum reflection loss (RL) can reach −21.4 dB with a CF@MoS2 composite coating thickness of 3.8 mm; the effective attenuation bandwidth (RL < −10 dB, i.e., 90% microwave energy is attenuated) is up to 10.85 GHz (7.15–18.0 GHz). From a detailed analysis, it is observed impedance mismatch is the critical limiting factor for MAPs rather than attenuation. Furthermore, for CF@MoS2@Fe3O4, the MAP is strongly dependent on the level of coating of magnetic Fe3O4-NPs on the surface of CF@MoS2 composites. The mechanisms underlying the superb MAP and related phenomena are investigated, opening new directions for fabricating CF-based microwave absorbers with high efficiency and wide-bandwidth. Finally, the occurrence of multi-reflection phenomena of EM waves in absorbers are critically analyzed.
KW - Carbon fiber
KW - FeO nanoparticles
KW - Microwave absorbers
KW - MoS nanosheets
UR - http://www.scopus.com/inward/record.url?scp=85095831765&partnerID=8YFLogxK
U2 - 10.1016/j.jcis.2020.10.109
DO - 10.1016/j.jcis.2020.10.109
M3 - 文章
C2 - 33176928
AN - SCOPUS:85095831765
SN - 0021-9797
VL - 586
SP - 457
EP - 468
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
ER -