Nanodiamond-based thermal fluids

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Abstract

Dispersions of nanodiamond (average size ∼6 nm) within dielectric insulator mineral oil are reported for their enhanced thermal conductivity properties and potential applications in thermal management. Dynamic and kinematic viscosities - very important parameters in thermal management by nanofluids - are investigated. The dependence of the dynamic viscosity is well-described by the theoretical predictions of Einstein's model. The temperature dependence of the dynamic viscosity obeys an Arrhenius-like behavior, where the activation energy and the pre-exponential factor have an exponential dependence on the filler fraction of nanodiamonds. An enhancement in thermal conductivity up to 70% is reported for nanodiamond based thermal fluids. Additional electron microscopy, Raman spectroscopy and X-ray diffraction analysis support the experimental data and their interpretation. © 2014 American Chemical Society.

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Taha-Tijerina, J. J., Narayanan, T. N., Tiwary, C. S., Lozano, K., Chipara, M., & Ajayan, P. M. (2014). Nanodiamond-based thermal fluids. ACS Applied Materials and Interfaces, 6(7), 4778–4785. https://doi.org/10.1021/am405575t

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