Lightweight and Anisotropic Porous MWCNT/WPU Composites for Ultrahigh Performance Electromagnetic Interference Shielding
National Center for Nanoscience and Technology · University of Chinese Academy of Sciences · +1 more institution
Abstract
Lightweight, flexible and anisotropic porous multiwalled carbon nanotube (MWCNT)/water‐borne polyurethane (WPU) composites are assembled by a facile freeze‐drying method. The composites contain extremely wide range of MWCNT mass ratios and show giant electromagnetic interference (EMI) shielding effectiveness (SE) which exceeds 50 or 20 dB in the X‐band while the density is merely 126 or 20 mg cm −3 , respectively. The relevant specific SE is up to 1148 dB cm 3 g −1 , greater than those of other shielding materials ever reported. The ultrahigh EMI shielding performance is attributed to the conductivity of the cell walls caused by MWCNT content, the anisotropic porous structures, and the polarization between…
Citation impact
- FWCI
- 16.12
- Percentile
- 100%
- References
- 46
Authors
6- ZZZhihui Zeng
National Center for Nanoscience and Technology, University of Chinese Academy of Sciences
- HJHao JinCorresponding
National Center for Nanoscience and Technology
- MCMingji Chen
National Center for Nanoscience and Technology
- WLWeiwei Li
National Center for Nanoscience and Technology, University of Chinese Academy of Sciences
- LZLicheng Zhou
Peking University
Topics & keywords
- Materials science
- Composite material
- Electromagnetic shielding
- Porosity
- Polyurethane
- Anisotropy
- Carbon nanotube
- EMI