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Multi-walled carbon nanotube/epoxy resin (MWCNT/EP) composites with filler contents from 0.03wt% to 0.5wt.% and two different aspect ratios are prepared by solution blended process. Carbon nanotubes are dispersed by sonication and high speed shear force. The impact of aspect ratio on electric and thermal conductivity of nanocomposites has been studied. Experiment results illustrate that percolation...
In this paper, the effect of preparation method on the permittivity and dielectric loss of nano-SiO2/epoxy composites was studied. The nano-SiO2 was dispersed into epoxy resin by three methods, which were “Ultrasonic Dispersion Method”, “High-speed Mixer Method” and “Sol-gel method”. The composites with 1wt%, 2wt%, 3wt% and 4wt% loading were made respectively. To compare the influence of the preparation...
In this paper, we investigate the influence of nanofiller material and its concentration on dielectric properties of epoxy-based composite systems. A comparative study is performed between the unfilled base epoxy, the systems containing one type of nanoparticles (silicon dioxide, aluminum oxide or aluminum nitride) and composites containing a combination of two different fillers inside the host polymer.
Insulation based on epoxy resin is widely used in high voltage applications. This paper shows the formulation of epoxy based nanocomposites and the influence of the filler material on the DC breakdown strength. Filler materials discussed are SiO2, Al2O3 and AlN with average particle size between 22 and 100 nm. AlN has been chosen because it has shown to considerably increase the thermal conductivity...
For the application of nanocomposite materials to solid insulator in electric power apparatus, we investigated the influence of the dispersibility of nanoparticles on dielectric property. Experiments were carried out in epoxy/alumina nanocomposites with the particle dispersion techniques using ultrasonic wave and centrifugal force. As the result, we verified the specific characteristics of dielectric...
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