Tailoring the Performance of a Composite PEI Nanofiltration Membrane via Incorporating Activated PDA for Efficient Dye Sieving and Salt Separation

Membranes, Год журнала: 2025, Номер 15(3), С. 75 - 75

Опубликована: Март 2, 2025

Efficient dye sieving and salt separation can facilitate the recycling of valuable resources in textile wastewater treatment. This study focuses on developing a high-performance nanofiltration membrane (NF) by co-depositing activated polydopamine (O-PDA), oxidized with KMnO4, polyethyleneimine (PEI) onto polysulfone support (PSF), thereby enabling effective separation. Due to high hydrophilicity PDA formation molecular polymers after oxidation, it was anticipated that O-PDA would crosslink PEI layer, providing rapid permeating channels. Filtration experiments demonstrated significantly enhanced retention rate membranes, achieving nearly threefold increase NaCl from 15% 45.7%. It observed performance could be adjusted controlling its loading or oxidation level. Furthermore, despite notable reduction permeability, removal efficiency O-PDA/PEI increased substantially 99.5%. Long-term filtration also confirmed both stability anti-fouling properties this design. Clearly, owing excellent operational characteristics, exhibits great potential for applications

Язык: Английский

Enhanced hydrophilicity and controlled pore size distribution of polyvinylidene fluoride membranes through segregation and grafting for protein anti-fouling

Desalination, Год журнала: 2025, Номер unknown, С. 118822 - 118822

Опубликована: Март 1, 2025

Язык: Английский