Experimental Study of Effects of GO-SiO۲-TiO۲–SDS Hybrid Nanofluids on Interfacial Tension by Du Noüy Ring Method

This research aimed to prepare and utilize a novel hybrid nanofluid (GO-SiO۲-TiO۲–SDS) to significantly reduce the InterFacial Tension (IFT) to a level lower than the IFT value of the SDS surfactant solution at the Critical Micelle Concentration (CMC) point. Accordingly, the GO-SiO۲-TiO۲ nanocomposite was synthesized, and its properties were evaluated through six different analyses, including Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive X-ray Spectroscopy (EDXS), Map Analysis, Fourier Transform InfraRed (FT-IR), spectroscopy X-Ray Diffraction (XRD),and ThermoGravimetric Analysis (TGA). To assess the effects of GO-SiO۲-TiO۲–SDS hybrid nanofluids on IFT reduction, SDS surfactant solutions were prepared at varying concentrations of SDS (۰, ۲۰۰, ۵۰۰, ۱۰۰۰, ۲۰۰۰, ۳۰۰۰, ۴۰۰۰, ۵۰۰۰, and ۶۰۰۰ ppm), and ۵۰۰ ppm was determined as the CMC. Different concentrations of the GO-SiO۲-TiO۲ nanocomposite (۱۰۰, ۵۰۰, ۱۵۰۰, and ۲۵۰۰ ppm) were separately added to deionized water, and then the SDS surfactant was added at the CMC value to prepare hybrid nanofluids. The results of IFT measurements reported by the Du Noüy ring method indicated that IFT values at the interfaces between ۵۰۰-ppm SDS surfactant solution/kerosene and (۲۵۰۰ ppm GO-SiO۲-TiO۲–۵۰۰ ppm SDS) hybrid nanofluid/kerosene decreased from ۲۳.۵۹ mN/m to ۲.۴۸ mN/m and ۰.۵۱ mN/m, respectively. Therefore, using the GO-SiO۲-TiO۲–SDS hybrid nanofluid could reduce the IFT value to a level lower than that of the SDS surfactant solution at the CMC point.

کلیدواژه ها:

hybrid nanofluids ، GO-SiO۲-TiO۲ nanocomposite ، SDS surfactant ، Interfacial tension reduction ، Du Noüy ring method