Antibiotic Zwitterionic Nanogel Membrane: from Molecular Dynamics Simulation to Structure Manipulation.

Area of Science:

• Materials Science
• Environmental Engineering
• Nanotechnology

Background:

• Membrane separation is crucial for wastewater treatment but faces challenges in permeability, fouling, and antimicrobial properties.
• Pathogen-repellent surfaces are essential for membranes to reduce viral pathogen presence.

Purpose of the Study:

• To design and fabricate antibiotic zwitterionic nanogel membranes with improved performance using a simulation-guided approach.
• To investigate the surface structure transition and its impact on membrane properties.

Main Methods:

• Molecular dynamics simulations were used to guide experiments on zwitterionic nanoparticle gel (ZNG)/Cu2+/glutaraldehyde (GA) synergy systems.
• Membrane surface structure transition from nanoparticles to network nanoflowers was induced and analyzed.
• ZNG-PVDF membranes were fabricated and tested for water permeability, rejection rate, and antibiofouling capacity.

Main Results:

• The ZNG/Cu2+/GA system demonstrated a transition from nanoparticle to network nanoflower structures, consistent with simulations.
• The resulting membranes exhibited superhydrophilicity and underwater superoleophobicity.
• Water permeability increased by nearly 40% with maintained rejection rates.
• Antibiofouling efficiency exceeded 99.3%, showing significant disinfection potential.

Conclusions:

• The simulation-guided experimental strategy successfully enhanced zwitterionic membrane properties.
• The novel network nanoflower structure offers superior water permeability and antifouling capabilities.
• These high-performance membranes show great promise for advanced wastewater disinfection applications.