02864nas a2200301 a 4500 20260818095136.0 230830s2015 th a ||| 000 eng d .b12411632 Fakruddin, Abdullah-Al-Muti Effect of zinc oxide and silica nanoparticle concentration on the boiling point of aqueous-based nanofluids Pathum Thani : Asian Institute of Technology, 2015 47 leaves : ill. A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Nanotechnology Thesis (M. Eng.) - Asian Institute of Technology, 2015 In this research, the effect on boiling point of water by adding ZnO and SiO2 nanoparticles was studied. At first, the boiling points of water and water with sugar were standardized, calibrated and analyzed statistically. Varying concentrations of ZnO and SiO2 nanofluids were heated at a constant heating rate until 350 °C hotplate temperature was achieved. Boiling temperature was determined after averaging three experiments using a standard liquid thermometer. Linear regression was accomplished for temperature vs. concentration curves to determine correlation. The slope of heating rate was also measured and analyzed with linear regression to gain insight into heating behavior of the nanofluids. ZnO nanoparticles and SiO2 nanoparticles were characterized by UV-Vis spectroscopy, Dynamic light scattering (DLS) and Scanning electron microscopy (SEM). Addition of greater concentrations of ZnO and SiO2 nanoparticles to the solutions resulted in boiling point depression of the fluids compared to pure water. This is in stark contrast to boiling point enhancement achieved for sugar/water mixtures that conformed to traditional principles defined under colligative properties. One possible cause for boiling point depression is that addition of hydrophilic (good surface wetting) nanoparticulates served to lower the overall heat capacity by providing enhanced heat transfer within the solution. Additionally, by adding perturbations to the highly organized water system (e.g. regular clusters linked with hydrogen bonding), disruptions in the normally strong bonding in water required less energy to cause the solution to boil at lower temperatures. Zinc oxide Surfaces Nanofluids Nanoparticles Hornyak, Gabriel Louis, Chairperson Mongkol Ekpanyapong, Examination Committee Supamas Danwittayakul, Examination committee Asian Institute of Technology Fellowship, Scholarship Donor Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B05192 .b12411632 mnait m 240419 0 230830 m a m 0 34816 34816