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Impact of Surfactants on the Electrical and Rheological Aspects of Silica Based Synthetic Ester Nanofluids
Indian Inst Technol Madras, Dept Elect Engn, Chennai 600036, Tamil Nadu, India..
Indian Inst Technol Madras, Dept Elect Engn, Chennai 600036, Tamil Nadu, India..
Indian Inst Technol Madras, Dept Elect Engn, Chennai 600036, Tamil Nadu, India..
Indian Inst Technol Madras, Dept Elect Engn, Chennai 600036, Tamil Nadu, India..
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2022 (English)In: IEEE Access, E-ISSN 2169-3536, Vol. 10, p. 18192-18200Article in journal (Refereed) Published
Abstract [en]

This study reports experimental investigations of the effects of different surfactants (CTAB, Oleic acid and Span 80) on silica based synthetic ester nanofluids. The positive and negative potential observed for the ionic (CTAB) and non-ionic surfactant (Span 80) from zeta potential analysis indicates an improved stability. The optimization of nanofillers and surfactants is performed considering the corona inception voltage measured using ultra high frequency (UHF) technique and fluorescent fiber. Rheological analysis shows no significant variation of properties with shear rate, implying Newtonian behavior even with the addition of surfactant. In addition, the permittivity of the nanofluid is not much affected by adding surfactant but a marginal variation is noticed in the loss tangent with the effect of temperature. The fluorescence spectroscopy shows no change in the emission wavelength with the addition of silica nanofiller and surfactants. Flow electrification studies indicate an increase in the streaming current with the rotation speed and temperature, with a higher current magnitude observed in the case of nanofluids.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE) , 2022. Vol. 10, p. 18192-18200
Keywords [en]
Surfactants, Fluids, Silicon compounds, Nanofluidics, Nanoparticles, Temperature measurement, Fluorescence, Synthetic ester, silica, stability, shear rate, viscosity, loss tangent, streaming current
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-309806DOI: 10.1109/ACCESS.2022.3151104ISI: 000760709500001Scopus ID: 2-s2.0-85124750854OAI: oai:DiVA.org:kth-309806DiVA, id: diva2:1644627
Note

QC 20220315

Available from: 2022-03-15 Created: 2022-03-15 Last updated: 2024-01-12Bibliographically approved

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Edin, Hans EzzTaylor, Nathaniel

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