Preparation and electromagnetic and microwave absorbing properties of Fe-filled carbon nanotubes

Preparation and electromagnetic and microwave absorbing properties of Fe-filled carbon nanotubes
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Fe填充碳纳米管的制备及其电磁微波吸收性能

DOI:
10.1016/j.jallcom.2008.03.127
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发表时间:
2009-03
影响因子:
6.2
通讯作者:
Shen, Zeng-Min
Shen, Zeng-Min
中科院分区:
材料科学2区
文献类型:
--
作者:
Li, Xia;Zhao, Dong-Lin;Shen, Zeng-Min

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通过湿化学方法将铁纳米粒子填充到碳纳米管(CNT)中。研究了铁填充碳纳米管的微波吸收、复介电常数和磁导率。 Fe填充碳纳米管的介电常数实部(ɛ′)和虚部(ɛ″)小于碳纳米管的介电常数。而铁填充碳纳米管的磁导率实部(μ′)和虚部(μ”)以及磁耗散因子tgδμ(μ”/μ′)均大于碳纳米管。 Fe填充的CNT/环氧树脂复合材料在11.8-14.7GHz时实现了低于-10dB(90%吸收)的反射损耗,在13.2GHz时最小值为-31.71dB。铁填充碳纳米管/环氧树脂复合材料的微波增强吸收归因于介电和磁损耗。通过将Fe纳米粒子填充到CNT中,CNT/环氧树脂复合材料的微波吸收峰移动到更高的频率。
The carbon nanotubes (CNTs) were filled with Fe nanoparticles via a wet-chemical method. Microwave absorption, complex permittivity and permeability of the Fe-filled CNTs have been investigated. The real part (ɛ′) and imaginary part (ɛ″) of the permittivity of the Fe-filled CNTs are smaller than those of CNTs. While the real part (μ′) and imaginary part (μ″) of the permeability and the magnetic dissipation factors tgδμ(μ″/μ′) of the Fe-filled CNTs are bigger than those of CNTs. The Fe-filled CNT/epoxy composites achieved a reflection loss below −10dB (90% absorption) at 11.8–14.7GHz, and the minimum value is −31.71dB at 13.2GHz. The microwave enhancement absorption of Fe-filled CNT/epoxy composites was attributed to both dielectric and magnetic losses. The microwave-absorbing peak of the CNT/epoxy composites moves to the higher frequency by filling the Fe nanoparticles into the CNTs.
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