Break
AIChE Annual Meeting
2023
2023 AIChE Annual Meeting
Engineering Sciences and Fundamentals
Thermophysical Properties: Theory and Experiments for Charged Systems
Thursday, November 9, 2023 - 8:55am to 9:15am
Nonporous silica particles of around 60-70 nm were synthesized and characterized using a Scanning Electron Microscope (SEM) and Image J software. Dynamic Light Scattering (DLS) was used to confirm the size of suspended particle solution, which was determined to be 60-80 nm. Next, the SNPs were amine-functionalized using 3-aminopropyl)triethoxysilane. To quantify the extent of amine functionalization, acid orange II was bound to the particles at low pH and recovered at high pH. The amount of bound dye was determined from UV-vis spectroscopy. The SNPs were modified by attaching a lipid bilayer containing a dye on the outside surface of the particles for further analysis of charge separations. The surface charge of the SNPs was measured across different batches of the particles by performing zeta potential using DLS. The movement of suspended dye-loaded particles across various membranes in the presence of an applied voltage was tracked. Future work will consist of additional electrodialysis experiments that relate the applied voltage and SNP surface properties to the effectiveness of the charge-based separations.