Synthesis of ZrO2 nanoparticles and effect of surfactant on dispersion and stability

A Review on Stability and Heat Transfer Performance of Nanofluid Using Surfactants

“…Furthermore, the presence of surfactant lowered the extent of clustering and ensured a better homogeneity of particle size distribution. Ordóñez et al [18] found at day 15, the average hydrodynamic diameter of ~130 nm was maintained for every other concentration of surfactant samples. Therefore, a low concentration of surfactant (0.01 wt%) is sufficient to improve the stabilization of the particles in the nanofluids.…”

“…The purpose of electrostatic stabilization is to increase the potential barrier between two particles so that particles cannot come too close to each other and form a strongly bonded cluster cause the zeta potential to increase. There were some researches reported by Gallego et al [14] and Ordóñez et al [18], with the addition of surfactants the pH value of the nanofluid will change. Thus, increase the zeta potential value of the nanofluids due to the ionic nature of surfactants Examples of ionic surfactants that exhibit electrostatic stabilization are cetyltrimethylammonium bromide (CTAB), tetradecyltrimethylammonium bromide (TTAB), sodium dodecyl sulfate (SDS), sodium dodecylbenzene sulfonate (SDBS) and many more.…”

“…The more the absorbance of UV-Vis, the lower the stability of nanofluid due to the sedimentation of the nanoparticles in nanofluid. Ordóñez et al [18] found that the nanofluid with surfactant had more stable absorbance compare to without surfactants after 20 days. Choudhary et al [20] had measured the MgO/EG-water nanofluid for 0.08, 0.2, and 0.4vol% using CTAB at particle to surfactant concentration 2:1.…”

“…Gallego et al [14] found out that the nanofluid with SDBS change of surface charge of nanoparticles to negative zeta potential due to the anionic nature of the SDBS up to -53.1mV. Furthermore, Ordóñez et al [18] mentioned that adding ionic surfactants in ZrO2/water nanofluid changed the pH value thus increase the zeta potential value. This causes the stability of nanofluids to increase.…”

Novel Nanohybrid Containing Magnetite Nanocluster‐Decorated Reduced Graphene Oxide Nanosheets for Heat Transfer Applications

“…Unstable nanofluids will exhibit a major decrease in initial absorbance value due to sedimentation of agglomerates. [18][19][20][21] To evaluate their efficacy for heat transfer applications, the thermal conductivity of RGO/Fe 3 O 4 nanofluids were studied as a function of volume fraction. To take into consideration the contribution of surfactant on nanofluid k, the thermal con- ductivity measurement was done for base fluid containing SDBS and the result shows no apparent change in base fluid k in presence of SDBS.…”