Loading...
Search for:
zirconium-dioxide
0.006 seconds
Experimental Study and Modelling of Ultrafine Particles Formation by Using the Supercritical Fluids
, Ph.D. Dissertation Sharif University of Technology ; Gotbi, Cyrus (Supervisor) ; Khanchi, AliReza (Supervisor) ; Farhadpour, Farhad (Co-Advisor) ; Dorkoosh, Farid (Co-Advisor)
Abstract
In this research, we focused on demonstration of features and advantages of supercritical fluids technology to formation of fine particles (nano and micro scales) from bulk materials (solid) and synthesized metal oxides nanoparticles. Therefore, using two different fluids, carbon dioxide and water, and two completely different methods, the Rapid expansion of supercritical solution and supercritical hydrothermal, were used to produce fine particles of drug (acetaminophen) and nano metal oxide (zirconium dioxide and bismuth ferrite). The summary of this research are as follows:1. The solubility of acetaminophen in SuperCritical-Carbon Dioxide (SC-CO2) with and without menthol as a cosolvent...
A simple route to synthesize zirconia antistatic thin films on glass substrates and their application to polymer-based composites
, Article Materials Chemistry and Physics ; Volume 244 , 1 April , 2020 ; Dolati, A ; Afshar, A ; Palardy, G ; Sharif University of Technology
Elsevier Ltd
2020
Abstract
In this study, zirconia antistatic coatings were synthesized by a simple dip coating sol-gel route on glass substrates, then applied to polymer-based composites to potentially improve their dust or water repellent capabilities. The coating solution contained a precursor (ZrCl4), solvent (isopropanol) and coupling agent. FTIR spectra confirmed ZrO2 and ZrO compounds in both solution and antistatic coating. FE-SEM images indicated ZrO2 fibers’ thickness was controlled by changing ZrCl4 concentration (150 g–15 g ZrCl4/l) or relative humidity (20%–60%) during coating drying. Fibers grew thicker when decreasing the former or increasing the latter. The surface electrical resistivity for all...