Pavitra, K S and Gurumurthy, S C and Yashoda, M P and Mateti, Tarun and Ramam, Koduri and Nayak, Roopa P and Murari, M S (2021) Polymer‑dispersant‑stabilized Ag nanofuids for heat transfer applications. Journal of Thermal Analysis and Calorimetry, 146. pp. 601-610. ISSN 1388-6150

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Abstract

One-step wet chemical method has been employed for the synthesis of silver (Ag) nanofuids followed by the preparation of polyvinyl pyrrolidone (PVP), polyvinyl alcohol (PVA) and PVP–PVA mixed-dispersant-stabilized nanofuids by varying the concentration ratio of dispersants for the viscosity and thermal conductivity analysis. The optical absorption studies indicate the presence of nanoparticles in the prepared fuids (or the formation of the silver nanoparticles). The shape and size of the nanoparticles are confrmed by the feld emission scanning electron microscopy, and the particle size distribution and zeta potential analysis were carried out by using dynamic light scattering. It is observed that the thermal conductivity of Ag nanofuids increases with an increase in the dispersant concentration with respect to the temperature. The maximum thermal conductivity enhancement of Ag nanofuids was observed in the presence of an equimolar ratio of PVP–PVA (1:1:1) blends as stabilizers

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