Stretch-Induced Spin-Cast Membranes Based on Semi-Crystalline Polymers for Efficient Microfiltration.

Area of Science:

• Materials Science
• Polymer Chemistry
• Chemical Engineering

Background:

• Traditional extrusion-casting of semi-crystalline polymer microfiltration membranes is inefficient, generating waste and requiring significant resources.
• Developing sustainable and cost-effective synthesis methods for microfiltration membranes is crucial for water treatment.

Purpose of the Study:

• To develop a new synthesis route for microfiltration membranes using spin-casting and stretch-induced pore formation.
• To investigate the effect of polymer-filler ratios and stretching on membrane properties.
• To evaluate the performance of the synthesized membranes for water purification.

Main Methods:

• Membrane synthesis via spin-casting using recycled high-density polyethylene (HDPE) and calcium carbonate filler.
• Investigating the influence of polymer-filler ratio and stretching on morphology, tensile strength, and water flow.
• Characterization of membrane properties including water flow rate, tensile strength, and water contact angle.

Main Results:

• Optimal conditions were identified for balancing pore structure and mechanical integrity.
• The synthesized permeable membrane achieved a water flow rate of 19 mL/min and a tensile strength of 32 MPa.
• The membranes demonstrated effective removal of suspended particles from water.

Conclusions:

• Spin-casting followed by stretch-induced pore formation offers a viable and potentially more sustainable method for producing microfiltration membranes from semi-crystalline polymers.
• The developed membranes show promising performance for water purification, comparable to commercial alternatives.
• This approach provides a tailored synthesis route for plastic-based microfiltration membranes.