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This paper presents the results of investigation of complex permittivity of composite materials based on carbon nanotubes. Values of the real and imaginary parts of dielectric constant are not monotonically dependent on the concentration and quantity of the CNT walls.
Modern composites have disadvantages in terms of detecting damaged regions and in their compatibility with electromagnetic environments. The use of non-destructive evaluation methods for composites could be enhanced and electromagnetic compatibility concerns could be alleviated by making the composites more conductive. We simulated a fabricated composition containing epoxy, graphite, and well dispersed...
We prepared a novel hybrid membrane by doping recast Nafion@ membrane with SiO2-CNTs composites where carbon nanotubes (CNTs) were decorated with SiO2 nano-particles. SiO2-CNTs were prepared via sol-gel method, and then mixed with nafion resin through sonication. Hydrophilic SiO2 nano-particles were chosed to increase the water uptake of hybrid membrane, and the CNTs were chosed to improve the mechanical...
We present the first electrical resistivity property of a new composite system: CNT-ceramic composites. Carbon nanotube-mullite composites (CNT/mullite = 1~15 vol. %) were prepared by hot-pressing the corresponding composite powders. The electrical resistivity of the composites was decreased remarkbly by adding a very small amount of CNT in relation to the unique specialities of the carbon nanotubes...
Terahertz (THz) lights ranging between far infrared and microwaves (0.1~10 THz) is of great importance due to the rich chemical and physical processes in this region. It has attracted increasing research attention for its unique advantages, such as non-destructive, non-contact, high signal to noise ratio than IR at frequencies lower than 3 THz, etc. Carbon materials filled polymer resin possesses...
This presentation examines aspects of the growth and filling of carbon nanotube forests. Composites containing CNTs are predicted to inherit the best properties of the CNTs (strength, toughness, resistivity, thermal conductivity). However, good dispersion of the CNTs is vitally important in fabricating composites with features approaching those theoretically predicted. Significant deterioration of...
In this paper, the multiwall carbon nanotubes were opened and then filled with Cu and Ag materials. Several kinds of carbon nanotubes/epoxy composites were prepared by melt mixing epoxy resin and the nanotubers mentioned above. The dielectric properties of the composites were investigated at room temperature. Experimental results showed that the dielectric properties of the MWNTs/epoxy composites...
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