Preparation of a Novel Thin-Film Composite Nanofiltration Membrane via Interfacial Polymerization and New Monomer for Desalination

In this paper, a novel sulfonated aromatic diamine (۲,۵-DABSS) was used as a monomer to prepare thethin-film composite nanofiltration (TFC NF) membranes. These membranes were utilized for desalinationof water in Kashan. Using this monomer and trimesoyl chloride, a series of sulfonated polyamide thinfilmswere coated on a microporous acrylic support membrane through an interfacial polymerizationtechnique. The membrane prepared under the optimum condition showed an increase in the pure waterflux (۶۱.۲ L/h.m۲) and rejection of ۱۰۰۰ ppm Na۲SO۴ aqueous solution (۹۵.۶%) in relation to commonpolyamide nanofiltration membrane. The reason of this observation was the improvement of surfacehydrophilicity which was enhanced by the presence of sulfonated diamine monomer. The properties ofmembrane were truly characterized by FT-IR, SEM and AFM nanofiltration setup.