Abstract
In this work, dielectric properties of carboxyl (–COOH) functionalized MWCNTs-Silicone oil (polydimethylsiloxanes) nanofluids have been studied at static frequency. Purchased carboxyl (–COOH)-f-multi-walled carbon nanotubes (MWCNTs) are purchased and characterized using transmission electron microscopy (TEM) technique. Carboxyl (–COOH)-f-MWCNT-Silicone oil nanofluids are prepared by dispersing COOH-MWCNT in Silicone oil (base fluid) with the help of probe sonicator. At various concentrations and at different temperatures dielectric parameters like static dielectric constant (ɛ0), excess dielectric constant (ɛE), dipole moment (μ), excess dipole moment (μE) and molar polarization (P) have been determined for COOH-f-MWCNT-Silicone oil nanofluids. The changes in the dielectric parameters with respect to five different concentrations and various temperatures (303 K to 323 K) are analyzed in the presence of intermolecular interactions happening in the COOH-f-MWCNT-Silicone oil nanofluid system. Excess dielectric constant and excess dipole moment values are found to be negative over entire concentration range of COOH-MWCNTs at every different temperature.
Published Version
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