A comparative study of EMI shielding properties of carbon nanofiber and multi-walled carbon nanotube filled polymer composites

被引：197

作者：

Yang, YL

Gupta, MC ^{[1
]}

Dudley, KL

Lawrence, RW

机构：

[1] Univ Virginia, Dept Elect & Comp Engn, Charlottesville, VA 22904 USA

[2] NASA, Langley Res Ctr, Electromagnet Res Branch, Hampton, VA 23681 USA

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2005年 / 5卷 / 06期

关键词：

carbon nanofibers; multi-walled carbon nanotubes; polystyrene; composites; electrical conductivity; electromagnetic interference shielding;

D O I：

10.1166/jnn.2005.115

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Electromagnetic interference shielding properties of carbon nanofiber- and multi-walled carbon nanotube-filled polystyrene composites were investigated in the frequency range of 8.2-12.4 GHz (X-band). It was observed that the shielding effectiveness of composites was frequency independent, and increased with the increase of carbon nanofiber or nanotube loading. At the same filler loading, multi-walled carbon nanotube-filled polystyrene composites exhibited higher shielding effectiveness compared to those filled with carbon nanofibers. In particular, carbon nanotubes were more effective than nanofibers in providing high EMI shielding at low filler loadings. The experimental data showed that the shielding effectiveness of the composite containing 7 wt% carbon nanotubes could reach more than 26 dB, implying that such a composite can be used as a potential electromagnetic interference shielding material. The dominant shielding mechanism of carbon nanotube-filled polystyrene composites was also discussed.

引用

页码：927 / 931

页数：5

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