Characterizations of Electrospun PVDF-Based Mixed Matrix Membranes with Nanomaterial Additives

Area of Science:

• Materials Science
• Chemical Engineering
• Environmental Science

Background:

• Global water scarcity necessitates advanced solutions like membrane-based desalination.
• Polyvinylidene difluoride (PVDF) membranes are crucial for electrochemical desalination systems.
• Optimizing PVDF membrane properties is key to enhancing desalination efficiency.

Purpose of the Study:

• To develop and characterize novel permselective polymeric membranes for electrochemical desalination.
• To optimize the preparation of polyvinylidene difluoride (PVDF) membranes using electrospinning.
• To investigate the effect of various nano-additives on PVDF membrane performance.

Main Methods:

• Electrospinning technique used for fabricating PVDF membranes.
• Incorporation of five different nano-additives: graphene oxide (GO), carbon nanotubes (CNTs), zinc oxide (ZnO), activated carbon (AC), and ZIF-8.
• Physiochemical characterization using FTIR, SEM, zeta potential, contact angle, conductivity, porosity, and pore size distribution analysis.

Main Results:

• PVDF membranes were successfully synthesized with varying additive compositions (0.18 wt.% and 0.45 wt.%).
• The PVDF/GO membrane demonstrated superior electrical conductivity (5.611 mS/cm), an average pore size of 2.086 µm, and a surface charge of -38.33 mV.
• Characterization revealed significant differences in physiochemical properties based on additive type and concentration.

Conclusions:

• The PVDF/GO membrane exhibits promising properties for application in electrochemical desalination.
• Electrospinning is an effective method for producing functionalized PVDF membranes.
• Further research can explore these optimized membranes for efficient water purification.