Journal of Inorganic Materials >
Electromagnetic and Absorbing Properties of Multi-walled Carbon Nanotubes/Epoxy-silicone Coatings
Received date: 2009-05-18
Revised date: 2009-06-28
Online published: 2010-02-20
Multi-walled carbon nanotubes as dielectric absorber and epoxy-silicone resin as matrix were used to fabricate multi-walled carbon nanotubes/epoxy-silicone resin coatings. The effects of multi-walled carbon nanotubes content and diameter on dielectric and microwave absorbing properties of the coatings were investigated in the frequency range from 2GHz to 18GHz. The results indicate that both of the real and imaginary part of the permittivity are enhanced with increasing multi-walled carbon nanotubes content and diameter. When the multi-walled carbon nanotubes content is 2wt%, the complex permittivity of the coatings keep almost constant in the frequency range from 2GHz to 18GHz, and are independent on the multi-walled carbon nanotubes diameter. As the multiwalled carbon nanotubes content increases to 5wt%, the complex permittivity of the coatings decreases with the increase of frequency, and also exhibits visible frequency-dependence dielectric response. The minimum reflection loss of the coatings shifts to the low frequency region (from 12.8GHz to 10.8GHz) as the multi-walled carbon nanotubes diameter increasing. The results of the microwave absorbing properties show that the good microwave absorption ability (below -10dB) can be obtained in a frequency range from 7GHz to 14GHz when the multi-walled carbon nanotubes content is 10wt% and the coating thickness is 2mm.
QING Yu-Chang
,
ZHOU Wan-Cheng
,
LUO Fa
,
ZHU Dong-Mei
. Electromagnetic and Absorbing Properties of Multi-walled Carbon Nanotubes/Epoxy-silicone Coatings
[J]. Journal of Inorganic Materials, 2010
, 15(2)
: 181
-185
.
DOI: 10.3724/SP.J.1077.2010.00181
［1］Yusoff A N, Abdullah M H, Ahmad S H, et al. Electromagnetic and absorption properties of some microwave absorbers. J. App. Phys., 2002, 92(2): 876-882.
［2］Dresselhaus M S. Applied physics nanotube antennas.Nature, 2004, 432(7020): 959-960.
［3］Martel R, Schmidt T, Shea H R, et al. Single- and multi-wall carbon nanotube fieldeffect transistors. Appl. Phys. Lett., 1998, 73(17): 2447-2449.
［4］Andrews R, Jacques D, Qian D, et al. Purification and structural annealing of multiwalled carbon nanotubes at graphitization temperatures. Carbon, 2001, 39(11): 1681-1687.
［5］Makeiff Darren A, Huber Trisha. Microwave absorption by polyanilinecarbon nanotube composites.Synthetic Met., 2006,156(7/8):497-505.
［6］李建婷, 曹全喜, 姚娇艳, 等. 热酸氧化及镀镍对碳纳米管吸波性能的影响.功能材料与器件学报, 2007, 13(5): 443-448.
［7］林海燕, 朱 红, 郭洪范, 等. Fe填充碳纳米管微波吸收材料的研究.北京交通大学学报, 2007, 31(3): 97-104.
［8］Watts P C P, Ponnampalam D R, Hsu W K, et al. The complex permittivity of multiwalled carbon nanotube-polystyrene composite films in X-band. Chem. Phys. Lett., 2003, 378(5/6): 609-614.
［9］Yang Y, Gupta M C, Dudley K L,et al. A comparative study of EMI shielding properties of carbon nanofiber and multi-walled carbon nanotube filled polymer composites. J. Nanosci. Nanotech., 2005, 5(6): 927-931.
［10］Mdarhri A, Carmona F, Brosseau C, et al. Direct current electrical and microwave properties of polymer-multiwalled carbon nanotubes composites. J. Appl. Phys., 2008, 103(5): 054303-1-9
［11］Li N, Huang Y, Du F, et al. Electromagnetic interference (EMI) shielding of single-walled carbon nanotube epoxy composites. Nano Lett., 2006, 6(6): 1141-1145.
［12］赵东林, 沈曾民 (ZHAO Dong-Lin, et al). 螺旋形手征碳纤维的微波介电特性. 无机材料学报(Journal of Inorganic Materials), 2003, 18(5): 1057-1062.
/
| 〈 |
|
〉 |
