Brush Polymers as Additive for Fabrication of Nanofiltration Membranesand their Application in Dye/Salt Removal

Polyethersulfone (PES) is a popular hydrophobic and fouling-prone membrane material. Mesoporoussilica (MS) was modified with hydrophilic polymer brushes using SI-ATRP to enhance PESmembranes. PES/MS-g-P(EPMA) and PES/MS-g-P(AEtMAC) composite membranes werefabricated using the phase inversion method. Increasing the additive concentration from ۰.۰۵ to ۰.۰۷۵wt.% improved the surface characteristics and hydrophilicity. The PES/MS-g-P(AEtMAC)membrane with ۰.۰۷۵ wt.% additive showed the highest water flux. All membranes exhibited >۹۹%rejection for dyes, while the composite membranes showed moderate salt rejection. The compositemembranes demonstrate high selectivity for dyes/salts and promise for treating dye-containingwastewater.

کلیدواژه ها:

Membrane ، Nanofiltration ، Phase inversion method ، SI-ATRP ، Nanocomposite ، Dye/saltrejection