Interfacial Polymerization on Polyethersulfone Ultrafiltration Membrane to Prepare Nanofiltration Layers for Dye...

Area of Science:

• Materials Science
• Environmental Engineering
• Chemical Engineering

Background:

• Nanofiltration membranes are crucial for treating dye wastewater.
• Interfacial polymerization is a common method for fabricating nanofiltration membranes.
• Developing efficient and stable membranes is essential for industrial applications.

Purpose of the Study:

• To prepare a novel nanofiltration membrane ((T-P-T)/PES) using interfacial polymerization.
• To investigate the interaction of tannic acid-assisted polyethylene polyamine (PEPA) with terephthalaldehyde (TPAL).
• To evaluate the performance and stability of the modified membrane for dye separation.

Main Methods:

• Fabrication of the (T-P-T)/PES membrane via interfacial polymerization on PES ultrafiltration membranes.
• Characterization using Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy.
• Optimization of PEPA deposition time, TPAL concentration, interfacial reaction time, and curing time.

Main Results:

• The modified membrane exhibited a permeation rate of 68.68 L·m⁻²·h⁻¹·bar⁻¹.
• Achieved over 99% rejection for various dyes.
• Demonstrated strong dye separation ability and good long-term stability.

Conclusions:

• The novel (T-P-T)/PES nanofiltration membrane shows high efficiency and stability for dye wastewater treatment.
• Interfacial polymerization with PEPA and TPAL is an effective strategy for membrane modification.
• The developed membrane holds promise for practical applications in environmental remediation.