Synthesis and characterization of thin film nanofiltration membrane from PES/PI blend with high antibacterial properties
Paper ID : 1237-MST2015-FULL
Authors:
Azadeh Ostadchinigar *
Membrane Research Laboratory, facuity o chemistry, Lorestan University
Abstract:
According to this study, a new generation of thin film polyamide membranes was prepared without using aqueous phase. In this work a PES/PI blend membrane was modified by different diamine (EDA) as crosslinker. The goal of using PI was to create proper conditions to attack of crosslinkers to the surface. Initially, the support was prepared by dissolving blend polyethersulfone/polyimide in dimethylformamid (DMF) and after membranes were manufacturing by phase inversion method. Then, diamine as a cross linker was utilized to prepare appropriate sites for better attaching of thin layer on the support membrane. By adding the diamine, the flux and rejection were decreased and increased, respectively. At the presence of TMC, a thin and dense layer was formed on the membrane surface due to the reaction of TMC with cross-linking diamines. Chemical and physical properties of the modified and unmodified membranes were measured by scanning electron microscopy (SEM), atomic force microscopy (AFM), FTIR-ATR, TGA and contact angle. The IR spectra and the measured performance indicated that the thin layer was successfully formed. In addition, the antifouling and antibacterial properties of the thin film membranes were both meaningfully improved which showed the capability and powerful of the prepared and modified membranes to overcome the settlement of the foulants on the surface. Furthermore, the new thin film membranes showed the good antibacterial properties.
Keywords:
Thin film nanocompositemembrane, PES/PI blend membranes, antibacterial
Status : Conditional Accept (Poster)