TY - JOUR
T1 - PVP-assisted transformation of ZIF-67 into cobalt layered double hydroxide/carbon fiber as electromagnetic wave absorber
AU - Zhao, Zehao
AU - Zhou, Xuejiao
AU - Kou, Kaichang
AU - Wu, Hongjing
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/3
Y1 - 2021/3
N2 - A high efficiency and ultra-light electromagnetic wave (EW) absorber is proposed without precedent. A series of hierarchical short carbon fibers (SCFs) based composites with in-situ grown cobalt layered double hydroxides (Co-LDHs) can be successfully synthesized via a simple PVP-assisted solvothermal method. The synthesized hierarchical structure is composed of 1D SCFs skeleton, 3D hydrangea-like Co-LDHs-1 and 1D rod-like Co-LDHs-2. Notably, ultralight (5 wt% in paraffin matrix), ultrathin (2.1 mm) and ultrawide (6.5 GHz) features are achieved in our composites by simply tuning the doping amount of PVP. The mechanism is explained by the tunable attenuation constant and impedance matching, that is, Co-LDHs-1 and Co-LDHs-2 with different conductivities and morphologies are coordinated to optimize the excessively high complex permittivity of SCFs. This contribution will shed the light on design of LDHs-based materials for light-weight, tuning, and high efficiency EW absorbers.
AB - A high efficiency and ultra-light electromagnetic wave (EW) absorber is proposed without precedent. A series of hierarchical short carbon fibers (SCFs) based composites with in-situ grown cobalt layered double hydroxides (Co-LDHs) can be successfully synthesized via a simple PVP-assisted solvothermal method. The synthesized hierarchical structure is composed of 1D SCFs skeleton, 3D hydrangea-like Co-LDHs-1 and 1D rod-like Co-LDHs-2. Notably, ultralight (5 wt% in paraffin matrix), ultrathin (2.1 mm) and ultrawide (6.5 GHz) features are achieved in our composites by simply tuning the doping amount of PVP. The mechanism is explained by the tunable attenuation constant and impedance matching, that is, Co-LDHs-1 and Co-LDHs-2 with different conductivities and morphologies are coordinated to optimize the excessively high complex permittivity of SCFs. This contribution will shed the light on design of LDHs-based materials for light-weight, tuning, and high efficiency EW absorbers.
KW - Electromagnetic wave
KW - Interlayer spacing
KW - Layered double hydroxides
KW - Tunable conductivity
UR - https://www.scopus.com/pages/publications/85095412206
U2 - 10.1016/j.carbon.2020.11.009
DO - 10.1016/j.carbon.2020.11.009
M3 - 文章
AN - SCOPUS:85095412206
SN - 0008-6223
VL - 173
SP - 80
EP - 90
JO - Carbon
JF - Carbon
ER -