Fabrication and Modification of Polyvinylchloride-based Nanofiltration Membrane by Using Sodium Dodecyl Sulfate as Anionic Surfactant for Water Treatment

In the current research, polyvinylchloride (PVC)-based nanofiltration membrane was prepared by using a mixture of N, N dimethylacetamide (DMAC) and tetrahydrofuran (THF) at a constant ratio of 85:15 as the solvent. The membranes were fabricated by a phase inversion method and casting solution technique. The effects of different ratios of anionic sodium dodecyl sulfate (SDS) in casting solution on membrane performance and phase inversion time were investigated. Flux, selectivity, water content, and the SEM of cross sectional of membranes were studied. The SEM results indicate a denser top layer for the membrane containing SDS compared to the pristine one. Also, the modified membrane containing 0.45 wt.% SDS showed better performance compared to the others.