期刊
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
卷 13, 期 11, 页码 7669-7674出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2013.7820
关键词
Carbon Nanotube; Polymer; Ni; Composite; Electromagnetic Wave Absorption
类别
资金
- Priority Research Centers Program through the National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Tachnology [2011-0031407]
- WCU program [R31-10071]
Since carbon nanotube (CNT) was first discovered in 1991 it has been considered as a viable type of conductive filler for electromagnetic wave absorption materials in the GHz range. In this paper, pearl necklace structure CNT/Ni nano powders were fabricated by a polyol process as conductive fillers Compared to synthesized CNT. pearl necklace Ni-decorated CNT increased the electrical conductivity by an order of 1 due to the enhancement of the Ni conductive network. Moreover, the decorated Ni particles prevented the agglomeration of CNTs by counterbalancing the Van der Walls interaction between the CNTs. A CNT/Ni nanocomposite showed a homogeneous dispersion in an epoxy-based matrix. This enhanced physical morphology and electrical properties lead to an increase in the loss tangent and reflection loss in the CNT/Ni/Epoxy nanocomposite compared to these characteristics of a CNT/Epoxy nanocornposite in range of 8-12 GHz. The electromagnetic wave absorption properties of CNT/Ni/epoxy nanocomposites will provide enormous opportunities for electronic applications where lightweight EMI shielding or electro-magnetic wave absorption properties are necessary.
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