Fabrication of ultralight helical porous carbon fibers with CNTs-confined Ni nanoparticles for enhanced microwave absorption
| Autor: | Idrees Khan, Pei Liu, Baoliang Zhang, Fei Wu, Tao Xiu, Zihao Liu, Baolei Zhu, Qiuyu Zhang |
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| Rok vydání: | 2021 |
| Předmět: |
Fabrication
Materials science Mechanical Engineering Reflection loss Nanoparticle Nanotechnology 02 engineering and technology Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering Nanomaterial-based catalyst 0104 chemical sciences law.invention Mechanics of Materials law Specific surface area Ceramics and Composites Composite material 0210 nano-technology Absorption (electromagnetic radiation) Microwave |
| Zdroj: | Composites Part B: Engineering. 215:108814 |
| ISSN: | 1359-8368 |
| DOI: | 10.1016/j.compositesb.2021.108814 |
| Popis: | It is extraordinarily difficult to develop low-cost and lightweight microwave absorbing materials that meet the needs of modern technology. Making rational use of biomass to prepare microwave absorbers is a sustainable way. Herein, we develop the catalytic self-deposition (CSD) technology and fabricate ultralight magnetic helical porous carbon fibers (MHPFs) with surface-grown carbon nanotubes (CNTs). There is no need to use expensive, flammable and explosive exogenous gases, avoiding the high energy consumption and potential safety issues faced by traditional energy-intensive catalytic chemical vapor deposition (CCVD) processes. The combined use of in-situ dipping and CSD technology realizes the in-situ growth and morphology control of CNTs encapsulated Ni nanocatalysts. Owing to the sophisticated structure, large specific surface area, complementary loss mechanisms and well-matched impedance, MHPFs exhibit exceptional microwave absorption performance. Notably, under the ultralow filler loading (5%), the strongest reflection loss (RL) exceeds −55.39 dB at 8.4 GHz, and the maximum absorption bandwidth (EAB, RL |
| Databáze: | OpenAIRE |
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