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Thermophysical properties of aqueous nanofluids modified with carbon nanostructures
Vozniakovskii A. A.
1, Voznyakovskii A.P.
2, Kalashnikova E. I.
1, Kidalov S. V.
1, Eidelman E. D.
1
1Ioffe Institute, St. Petersburg, Russia
2S.V. Lebedev research Institute for Synthetic Rubber, Saint-Petersburg, Russia
2S.V. Lebedev research Institute for Synthetic Rubber, Saint-Petersburg, Russia
Email: alexey_inform@mail.ru, voznap@mail.ru, kalashnikatja@bk.ru, Kidalov@mail.ioffe.ru, eidelman@mail.ioffe.ru
The results of the study of thermal conductivity and viscosity of water-based nanofluids modified with commercial detonation nanodiamond (DND) purified under self-propagating high-temperature synthesis conditions are presented, which made it possible to obtain a dispersion of up to 90 nm. Also, using this purification technique, it became possible to obtain stable nanofluids based on DND with a content of up to 1 vol.%, as well as to get an increase in thermal conductivity of up to 26% at 55oC, but the addition of DND led to an increase in the viscosity of the final nanofluid to 62%. The experimental data were compared with theoretical calculations using models to establish the most important parameters for obtaining high thermal conductivity. Another carbon nanomaterial, few-layer graphene, which has a thermal conductivity similar to DND, was also compared. Keywords: nanofluid, nanodiamond, self-propagating high-temperature synthesis, viscosity, thermal conductivity.
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