| Autor: |
Asiri AM; Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia., Petrosino F; Department of Computer Engineering, Modeling, Electronics and Systems (D.I.M.E.S.), University of Calabria, Via-P. Bucci, Cubo-42A, 87036 Rende, CS, Italy., Pugliese V; Department of Computer Engineering, Modeling, Electronics and Systems (D.I.M.E.S.), University of Calabria, Via-P. Bucci, Cubo-42A, 87036 Rende, CS, Italy., Khan SB; Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia., Alamry KA; Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia., Alfifi SY; Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia., Marwani HM; Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia., Alotaibi MM; Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia., Algieri C; Institute on Membrane Technology, ITM-CNR, Ponte P. Bucci, Cubo 17/C, 87036 Rende, CS, Italy., Chakraborty S; Department of Computer Engineering, Modeling, Electronics and Systems (D.I.M.E.S.), University of Calabria, Via-P. Bucci, Cubo-42A, 87036 Rende, CS, Italy. |
| Abstrakt: |
The casting and preparation of ultrafiltration ZnO modified cellulose acetate membrane (CA/ZnO) were investigated in this work. CA membranes were fabricated by phase inversion using dimethylformamide (DMF) as a solvent and ZnO as nanostructures materials. Ultrafiltration (UF) performance, mechanical stability, morphology, contact angle, and porosity were evaluated on both CA- and ZnO-modified CA samples. Scanning electron microscopy (SEM) was used to determine the morphology of the membranes, showing different pore sizes either on rough surfaces and cross-sections of the samples, an asymmetric structure and ultra-scale pores with an average pore radius 0.0261 to 0.045 µm. Contact angle measurements showed the highest hydrophobicity values for the samples with no ZnO addition, ranging between 48° and 82.7° on their airside. The permeability values decreased with the increasing CA concentration in the casting solution, as expected; however, ZnO-modified membranes produced lower flux than the pure CA ones. Nevertheless, ZnO modified CA membranes have higher surface pore size, pore density and porosity, and improved surface hydrophilicity compared with pure CA membranes. The results indicated that the incorporated nano-ZnO tends to limit the packing of the polymer chains onto the membrane structure while showing antifouling properties leading to better hydrophilicity and permeation with consistent UF applications. |
