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Related Concept Videos

Mechanisms of Membrane-bending01:15

Mechanisms of Membrane-bending

The living membranes are flexible due to their fluid mosaic nature; however, their bending into different shapes is an active process regulated by specific lipids and proteins. The membrane bending can be transient as seen in vesicles or stable for a long time as in microvilli. Cells regulate the size, location, and duration of the membrane curvature.
Membrane bending can happen due to intrinsic changes in lipid composition or extrinsic association with different proteins. The proteins involved...

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

Junaid Saleem1, Zubair Khalid Baig Moghal2, Ahsan Hafeez2

  • 1Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha P.O. Box 5825, Qatar.

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Summary

This study introduces a novel spin-casting method for creating microfiltration membranes from recycled high-density polyethylene (HDPE). The developed membranes demonstrate effective particle removal and good mechanical strength for water purification applications.

Keywords:
membranemicrofiltrationplastic wastepolyethylenespin-castingstrengthstretching

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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.