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Updated: Sep 24, 2025

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
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Antifouling and antimicrobial polyethersulfone/hyperbranched polyester-amide/Ag composite.

Ayman El-Gendi1, Ahmed F Ghanem2, Mohamed A Yassin2,3

  • 1Chemical Engineering and Pilot Plant Department, Engineering Division, National Research Centre Giza Egypt.

RSC Advances
|May 6, 2022
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Summary

This study developed an antifouling and antibacterial polyethersulfone composite film using hyperbranched polyester-amide and silver nanoparticles. The resulting composite film shows significant antimicrobial properties for applications like desalination and packaging.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Antifouling and antibacterial materials are crucial for various applications.
  • Polyethersulfone (PES) is a versatile polymer, but its native properties require enhancement for specific functionalities.
  • Developing composite materials with integrated antimicrobial properties is an active area of research.

Purpose of the Study:

  • To develop a facile method for creating antifouling and antibacterial polyethersulfone (PES) composite films.
  • To utilize hyperbranched polyester-amide (PESAM) as a reducing and capping agent for in situ silver nanoparticle (AgNP) formation.
  • To investigate the properties and antibacterial efficacy of the developed composite film.

Main Methods:

  • Synthesis of silver nanoparticles (AgNPs) using PESAM as a reducing and capping agent.
  • Fabrication of free-standing composite films (PES/PESAM/Ag) via the phase inversion method.
  • Characterization of AgNPs and composite films using FTIR, UV-vis, SEM, TEM, XRD, EDX, and contact angle measurements.

Main Results:

  • AgNPs were successfully synthesized with a narrow size distribution (approx. 6 nm) and formed in situ within the PES matrix.
  • The inclusion of PESAM enhanced the hydrophilicity of the composite film.
  • The PES/PESAM/Ag composite film demonstrated significant antibacterial activity against both Gram-positive and Gram-negative bacteria.

Conclusions:

  • A facile and effective approach for creating antifouling and antibacterial PES composite films was established.
  • The developed composite films show promise for applications requiring antimicrobial surfaces, such as desalination membranes and active packaging.
  • The in situ formation of AgNPs within the PES matrix offers a robust method for imparting durable antimicrobial properties.