Nanodiamond-based thermal fluids

Jose Jaime Taha-Tijerina, Tharangattu Narayanan Narayanan, Chandra Sekhar Tiwary, Karen Lozano, Mircea Chipara, Pulickel M. Ajayan

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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.
Original languageEnglish
Pages (from-to)4778-4785
Number of pages8
JournalACS Applied Materials and Interfaces
DOIs
Publication statusPublished - 9 Apr 2014
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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