Chlorine resistant glutaraldehyde crosslinked polyelectrolyte multilayer membranes for desalination

Area of Science:

• Materials Science
• Chemical Engineering
• Environmental Science

Background:

• Commercial desalination membranes face challenges with chlorine degradation.
• Developing cost-effective and durable membranes is crucial for water treatment.

Purpose of the Study:

• To synthesize crosslinked polyelectrolyte multilayer membranes with enhanced salt rejection and chlorine resistance.
• To evaluate the performance of these membranes on commercial substrates.

Main Methods:

• Fabrication of polyelectrolyte multilayer membranes directly onto porous substrates.
• Crosslinking of polycation layers using glutaraldehyde.
• Incorporation of a sulfonated polysulfone polyanion for chlorine resistance.

Main Results:

• Achieved sodium chloride (NaCl) rejection rates up to 97%.
• Demonstrated significantly increased resistance to chlorine compared to conventional membranes.
• Successful fabrication on readily available commercial substrates.

Conclusions:

• Crosslinked polyelectrolyte multilayer membranes present a promising advancement in desalination technology.
• The developed membranes offer a competitive alternative to existing technologies due to their performance and durability.
• Further research can explore optimization for large-scale water treatment applications.