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Self-Sanitizing Polycaprolactone Electrospun Nanofiber Membrane with Ag Nanoparticles.

Elizaveta S Permyakova1, Anton Manakhov1,2, Philipp V Kiryukhantsev-Korneev1

  • 1National University of Science and Technology "MISIS", Moscow 119049, Russia.

Journal of Functional Biomaterials
|July 28, 2023
PubMed
Summary

Researchers developed eco-friendly, self-sanitizing nanofibers by embedding silver nanoparticles (Ag NPs) onto polycaprolactone (PCL) surfaces. These PCL-Ag nanofibers show broad-spectrum antimicrobial activity, making them suitable for various applications.

Keywords:
Ag nanoparticlesantibacterial activityantifungal activityface masksplasma polymerizationpolycaprolactone nanofibers

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biomedical Engineering

Background:

  • Developing effective antimicrobial materials is crucial for public health.
  • Electrospun nanofibers offer versatile platforms for material functionalization.
  • Biodegradable polymers like polycaprolactone (PCL) are desirable for biomedical applications.

Purpose of the Study:

  • To create an environmentally friendly and scalable method for producing self-sanitizing nanofibers.
  • To immobilize silver nanoparticles (Ag NPs) onto plasma-treated PCL nanofibers for antimicrobial properties.
  • To characterize the distribution, concentration, and release kinetics of Ag NPs and Ag ions.

Main Methods:

  • Plasma treatment of PCL nanofibers to introduce carboxyl groups.
  • Immobilization of Ag NPs via electrostatic interaction and UV-light reduction.
  • Analysis of Ag NP distribution and concentration using EDXS/XPS.
  • Quantification of Ag ion release using ICP AES.
  • Antimicrobial efficacy testing against various microorganisms and biofilm formation.

Main Results:

  • Uniform distribution of Ag NPs achieved on plasma-treated PCL nanofibers.
  • Controlled release of Ag ions observed, with a decrease after an initial burst.
  • Significant antimicrobial activity demonstrated against gram-negative and gram-positive bacteria, fungi, and biofilms.
  • PCL-Ag nanofibers retained substantial surface silver after immersion, indicating stability.

Conclusions:

  • A scalable and eco-friendly method for producing self-sanitizing PCL-Ag nanofibers was successfully developed.
  • These nanofibers exhibit potent, broad-spectrum antimicrobial properties suitable for applications like wound dressings, water, and air filtration.
  • Controlling silver ion concentration and release is key to optimizing efficacy and minimizing potential toxicity.