Date/Time: 04-23-2019 - Tuesday - 05:00 PM - 07:00 PM
SungHyun Hong1 Soo Young Kim1

1, Chung-Ang University, Seoul, , Korea (the Republic of)

Advances in nanotechnology have contributed to dramatically increasing the thermal conductivity of fluids. Nanoparticles with high thermal conductivity have a high surface area relative to their mass and thus increase the thermal conductivity of the fluid more efficiently with a small amount of addition. However, unlike a pure solution such as DI water, complex fluids such as drilling mud have a large influence of other components so not too much increase the thermal conductivity through the addition of nanoparticles. Therefore, we do not simply add nanoparticles but use a method to increase the thermal conductivity by growing ceramics with high thermal conductivity directly on the solid particle surface added to the complex fluid. Synthesis of nanoparticles using the conventional bottom-up method was inferior in terms of cost and yield compared to synthesizing nanoparticles in a top-down method. But it is expected that only small amounts of nanoparticles will have a great effect, if the particles are synthesized only on the surface of the other particles by the bottom-up method.
We made drilling mud after functionalization of ceramics (BN, SiC, MoS2, WS2) with high thermal conductivity on bentonite surface which is the most important additive substance to drilling mud. Thermal conductivity of the drilling mud was compared with the conventional method in which the same amounts of nanoparticles were simply mixed in the conventional method in which the same amounts of nanoparticles were simply mixed in the drilling mud. We also measured the FE-SEM, RAMAN, and XPS to check the growth of the particles on the bentonite surface and measured the viscosity according to the flow rate to confirm the performance as a drilling mud. We report how to increase the thermal conductivity of a complex fluid in a different way than previously.

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