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Preparation and characterization of carbon nanofluid by a plasma arc nanoparticles synthesis system.

Teng TP, Cheng CM, Pai FY - Nanoscale Res Lett (2011)

Bottom Line: The particle size and shape were determined using the light-scattering size analyzer, SEM, and TEM.The thermal conductivity of carbon/water nanofluid increased by about 25% at 50°C compared to distilled water.The experimental results demonstrated excellent thermal conductivity and feasibility for manufacturing of carbon/water nanofluids.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Industrial Education, National Taiwan Normal University, No, 162, Sec, 1, He-ping E, Rd,, Da-an District, Taipei City 10610, Taiwan. tube5711@ntnu.edu.tw.

ABSTRACT
Heat dissipation from electrical appliances is a significant issue with contemporary electrical devices. One factor in the improvement of heat dissipation is the heat transfer performance of the working fluid. In this study, we used plasma arc technology to produce a nanofluid of carbon nanoparticles dispersed in distilled water. In a one-step synthesis, carbon was simultaneously heated and vaporized in the chamber, the carbon vapor and particles were then carried to a collector, where cooling furnished the desired carbon/water nanofluid. The particle size and shape were determined using the light-scattering size analyzer, SEM, and TEM. Crystal morphology was examined by XRD. Finally, the characterization include thermal conductivity, viscosity, density and electric conductivity were evaluated by suitable instruments under different temperatures. The thermal conductivity of carbon/water nanofluid increased by about 25% at 50°C compared to distilled water. The experimental results demonstrated excellent thermal conductivity and feasibility for manufacturing of carbon/water nanofluids.

No MeSH data available.


Related in: MedlinePlus

SEM image of carbon nanoparticles. (a) NC-70, (b) NC-80.
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Figure 2: SEM image of carbon nanoparticles. (a) NC-70, (b) NC-80.

Mentions: We maintained the working currents at 70 A (NC-70) and 80 A (NC-80). Table 1 lists the fabrication parameters and partial experimental and calculated results for the carbon/water nanofluid. Figures 2 and 3 are respectively the SEM and TEM photographs of carbon nanoparticles. From the figures, these can show that the nanoparticles are irregular in shape, and the nanoparticles occurred in an aggregate phenomenon. In addition, Figure 3c, d is the TEM photograph for the edge of carbon nanoparticles. The thickness of carbon nanoparticles is much smaller than its length and width in the photographs. Overall, the shape of these nanoparticles is of the shape of flakes (d-Spacing about 0.35 nm).


Preparation and characterization of carbon nanofluid by a plasma arc nanoparticles synthesis system.

Teng TP, Cheng CM, Pai FY - Nanoscale Res Lett (2011)

SEM image of carbon nanoparticles. (a) NC-70, (b) NC-80.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211359&req=5

Figure 2: SEM image of carbon nanoparticles. (a) NC-70, (b) NC-80.
Mentions: We maintained the working currents at 70 A (NC-70) and 80 A (NC-80). Table 1 lists the fabrication parameters and partial experimental and calculated results for the carbon/water nanofluid. Figures 2 and 3 are respectively the SEM and TEM photographs of carbon nanoparticles. From the figures, these can show that the nanoparticles are irregular in shape, and the nanoparticles occurred in an aggregate phenomenon. In addition, Figure 3c, d is the TEM photograph for the edge of carbon nanoparticles. The thickness of carbon nanoparticles is much smaller than its length and width in the photographs. Overall, the shape of these nanoparticles is of the shape of flakes (d-Spacing about 0.35 nm).

Bottom Line: The particle size and shape were determined using the light-scattering size analyzer, SEM, and TEM.The thermal conductivity of carbon/water nanofluid increased by about 25% at 50°C compared to distilled water.The experimental results demonstrated excellent thermal conductivity and feasibility for manufacturing of carbon/water nanofluids.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Industrial Education, National Taiwan Normal University, No, 162, Sec, 1, He-ping E, Rd,, Da-an District, Taipei City 10610, Taiwan. tube5711@ntnu.edu.tw.

ABSTRACT
Heat dissipation from electrical appliances is a significant issue with contemporary electrical devices. One factor in the improvement of heat dissipation is the heat transfer performance of the working fluid. In this study, we used plasma arc technology to produce a nanofluid of carbon nanoparticles dispersed in distilled water. In a one-step synthesis, carbon was simultaneously heated and vaporized in the chamber, the carbon vapor and particles were then carried to a collector, where cooling furnished the desired carbon/water nanofluid. The particle size and shape were determined using the light-scattering size analyzer, SEM, and TEM. Crystal morphology was examined by XRD. Finally, the characterization include thermal conductivity, viscosity, density and electric conductivity were evaluated by suitable instruments under different temperatures. The thermal conductivity of carbon/water nanofluid increased by about 25% at 50°C compared to distilled water. The experimental results demonstrated excellent thermal conductivity and feasibility for manufacturing of carbon/water nanofluids.

No MeSH data available.


Related in: MedlinePlus