preparation of cuo/water nanofluids using polyvinylpyrolidone and a survey on its stability and thermal conductivity

Authors

m. sahooli

s. sabbaghi

m. shariaty niassar

abstract

in this article cuo/water nanofluid was synthesized by using polyvinylpyrolidone (pvp) as the dispersant.  thenanofluid stability period and the heat transfer enhancement were determinedby measuring the thermal conductivities. to study the nano-fluid stability, zeta (ζ) potential, and absorbency were measured under different ph values and pvp surfactant concentrations; also thermal conductivity enhancement was measured based on different volume fraction of cuo nanoparticles and temperature. the results showed that the nano-fluid with pvp surfactant has a good stability of about a week in the optimum ph and pvp concentration which are 8 and 0.095,respectively. furthermore, in the abovementioned concentration of ph and pvp, optimum cuo volume fraction of 6% was obtained, in which, the thermal conductivity enhancement is 17% at 25oc. finally, with changing temperature at optimum values (for pvp surfactant and cuo nanoparticles), 31% increase in thermal conductivity was obtained at 50oc.

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Journal title:
international journal of nanoscience and nanotechnology

Publisher: iranian nano society

ISSN 1735-7004

volume 8

issue 1 2012

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