Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 230, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2022.109718
Keywords
Hybrid carbon aerogel; Supercritical CO2 foaming method; Microcellular epoxy-based nanocomposite; Electromagnetic interference shielding effectiveness
Categories
Funding
- National Natural Science Foundation of China [51773170]
- International Science &Technology Cooperation Plan of Shaanxi Province [2021KW52]
- Fund of Natural Science Foundation of Shaanxi Provincial [2021JQ111]
- Fund of Basic and Applied Fundamental Research of Guangdong Provincial [2020A1515110861]
- Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University [CX202051]
Ask authors/readers for more resources
A gelation-press drying-impregnation & micro-foaming method was used to fabricate a microcellular epoxy foam with hybrid reduced graphene oxide/short-carbon-fiber aerogel. The resulting foam exhibited low density, high electrical conductivity, enhanced compressibility, and outstanding EMI shielding effectiveness.
Carbon aerogel shows great potential in electromagnetic interference shielding (EMI) application and is generally strengthened by epoxy impregnation for harsh working environment. However, it is still challenging to simul-taneously achieve high mechanical robustness and EMI performance, especially taking low-cost and light-weight feature into account. In this work, a gelation-press drying-impregnation & micro-foaming method was sys-tematically reported to target microcellular epoxy foam containing hybrid reduced graphene oxide (rGO)/short-carbon-fiber (SCF) aerogel. Herein, aerogel morphology was transformed from isotropic honey-comb structure into anisotropic corrugated structure by controllable press air-drying. A further supercritical carbon dioxide (scCO(2)) foaming process was implemented for density reduction. Moreover, the anisotropic microcellular epoxy (m-EP)/rGO-SCF foam (D =-0.48 mu m, Nf = 5.02 x 10(12) cell/cm3) shows low density (1.14 g/cm(3)), high electrical conductivity (2365.0 S/m), enhanced compressibility (sigma b = 243.0 MPa, epsilon b =-45%) and outstanding EMI shielding effectiveness (95.5 dB) with a low thickness (2.0 mm) within X band (8.2-12.4 GHz). Therefore, our work provides a universal step-by-step and industrial-friendly approach to fabricate light-weight carbon-aerogel-based foams with anisotropic carbon structure and outstanding EMI performance.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available