Polymer-dispersant-stabilized Ag nanofluids for heat transfer applications
| Autor: | S. C. Gurumurthy, M. P. Yashoda, M. S. Murari, K. S. Pavithra, Tarun Mateti, Roopa Nayak, Koduri Ramam |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Nanoparticle 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Dispersant Polyvinyl alcohol Concentration ratio Silver nanoparticle chemistry.chemical_compound Nanofluid Thermal conductivity Chemical engineering chemistry Dynamic light scattering 0103 physical sciences Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Journal of Thermal Analysis and Calorimetry. 146:601-610 |
| ISSN: | 1588-2926 1388-6150 |
| DOI: | 10.1007/s10973-020-10064-8 |
| Popis: | Abstract One-step wet chemical method has been employed for the synthesis of silver (Ag) nanofluids followed by the preparation of polyvinyl pyrrolidone (PVP), polyvinyl alcohol (PVA) and PVP–PVA mixed-dispersant-stabilized nanofluids 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 fluids (or the formation of the silver nanoparticles). The shape and size of the nanoparticles are confirmed by the field 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 nanofluids increases with an increase in the dispersant concentration with respect to the temperature. The maximum thermal conductivity enhancement of Ag nanofluids was observed in the presence of an equimolar ratio of PVP–PVA (1:1:1) blends as stabilizers. Graphic abstract |
| Databáze: | OpenAIRE |
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