期刊
ACS APPLIED MATERIALS & INTERFACES
卷 4, 期 12, 页码 6949-6956出版社
AMER CHEMICAL SOC
DOI: 10.1021/am3021069
关键词
carbon nanotube; ferroferric oxide; polyaniline; heterostructure; microwave absorption
资金
- National Science Foundation of P. R. China [50972014, 51072024, 51132002]
Light-weight nanocomposites filled with carbon nanotubes (CNTs) are developed for their significant potentials in electromagnetic shielding and attenuation for wide applications in electronics, communication devices, and specific parts in aircrafts and vehicles. Specifically, the introduction of a second phase into/onto CNTs for achieving CNT-based heterostructures has been widely pursued due to the enhancement in either dielectric loss or magnetic loss. In this work, ferroferric oxide (Fe3O4) was selected as the phase in multiwalled carbon nanotube (MWCNT)-based composites for enhancing magnetic properties to obtain improved electromagnetic attenuation. A direct comparison between the two-phase heterostructures (Fe3O4/MWCNTs) and polyaniline (PANI) coated Fe3O4/MWCNTs, namely, three-phase heterostructures (PANI/Fe3O4/MWCNTs), was made to investigate the interface influences of Fe3O4 and PANI on the complex permittivity and permeability separately. Compared to PANI/Fe3O4/MWCNTs, Fe3O4/MWCNTs exhibited enhanced magnetic properties coupled with increased dielectric properties. Interfaces between MWCNTs and heterostructures were found to play a role in the corresponding properties. The evaluation of microwave absorption of their wax composites was carried out, and the comparison between Fe3O4/MWCNTs and PANI/Fe3O4/MWCNTs with respect to highly efficient microwave absorption and effective absorption bandwidth was discussed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据