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Polyimide-based porous carbon and cobalt nanoparticle composites as high-performance electromagnetic wave absorbers.
Yu, Wentao; Lin, Jiahui; Zhao, Zhaozhang; Fang, Jiyong; Wang, Ziqing; Huang, Jintao; Min, Yonggang.
Afiliação
  • Yu W; Guangdong University of Technology Guangzhou 51000 Guangdong China ygmin@gdut.edu.cn.
  • Lin J; Guangdong University of Technology Guangzhou 51000 Guangdong China ygmin@gdut.edu.cn.
  • Zhao Z; Guangdong University of Technology Guangzhou 51000 Guangdong China ygmin@gdut.edu.cn.
  • Fang J; Midea Corporate Research Cente Foshan 528000 Guangdong China.
  • Wang Z; Visionox Technology Co., Ltd Guangzhou 51000 Guangdong China.
  • Huang J; Guangdong University of Technology Guangzhou 51000 Guangdong China ygmin@gdut.edu.cn.
  • Min Y; Guangdong University of Technology Guangzhou 51000 Guangdong China ygmin@gdut.edu.cn.
RSC Adv ; 14(14): 9716-9724, 2024 Mar 20.
Article em En | MEDLINE | ID: mdl-38525061
ABSTRACT
This study successfully utilized a straightforward approach, choosing liquid-liquid phase separation to build a porous structure and synthesize composite absorbers based on polyimide-based porous carbon and cobalt nanoparticles (designated as PPC/Co-700 and PPC/Co-800). A fine porous structure was achieved as a result of the excellent heat resistance of polyimide resulting in an excellent electromagnetic wave absorption ability of PPC/Co composites. The results obtained clearly indicated that PPC/Co-700 and PPC/Co-800 exhibit a porous structure with coral-like pores, enhancing both impedance matching properties and microwave attenuation abilities. This improvement in impedance matching conditions and dissipation capability is attributed to the synergistic effect of dielectric loss induced by carbon and magnetic loss induced by Co nanoparticles. PPC/Co-700 showed the strongest absorption performance with a minimum reflection loss of -59.85 dB (30 wt% loading, thickness of 3.42 mm) and an effective absorption bandwidth (EABW, RL ≤ -10 dB) of 6.24 GHz (30 wt% loading, thickness of 2.78 mm). Therefore, this work provides a facile strategy for the development of a promising absorbing material with outstanding electromagnetic wave absorption performance.

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article