Influence of Fabric Support on Improving the Layer-by-Layer Polyethersulfone Membrane Performance

Area of Science:

• Materials Science
• Chemical Engineering
• Environmental Science

Background:

• Reverse osmosis (RO) membranes are crucial for water purification.
• The performance of RO membranes is significantly influenced by the support material used.
• Optimizing support selection is key to enhancing membrane efficiency and durability.

Purpose of the Study:

• To investigate the impact of various woven and non-woven support materials on reverse osmosis membrane performance.
• To identify the optimal support material for enhanced permeate flux and salt rejection.
• To evaluate the mechanical properties of membranes prepared with different supports.

Main Methods:

• Preparation of reverse osmosis membranes using different support materials (polyester woven, polyester non-woven, polypropylene).
• Characterization of membrane properties including permeate flux and salt rejection.
• Assessment of the mechanical strength of the prepared membranes.

Main Results:

• The membrane on polyester woven support (M1ws) achieved a permeate flux of 39.9 LMH using a piperazine coagulation bath.
• The membrane on polyester non-woven support (M2ns) demonstrated the highest salt rejection of 92.2% with a Melamine coagulation bath.
• Mechanical properties were ranked: M1ws > M2ns > M3np, with the polypropylene support (M3np) exhibiting the lowest mechanical properties.

Conclusions:

• Support material selection critically affects RO membrane performance, including flux, rejection, and mechanical stability.
• Polyester non-woven supports offer a promising balance of high salt rejection and good mechanical properties.
• Further research into support material optimization can lead to more efficient and robust RO systems.