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Re-designing nano-silver technology exploiting one-pot hydroxyethyl cellulose-driven green synthesis.

M Blosi1, A Brigliadori1, S Ortelli1

  • 1National Research Council of Italy, Institute of Science, Technology and Sustainability for Ceramics, (CNR-ISSMC), Faenza (RA), Italy.

Frontiers in Chemistry
|August 29, 2024
PubMed
Summary

This study introduces an eco-friendly method to create silver nanoparticles (AgNPs) using hydroxyethyl cellulose (HEC). The resulting AgHEC material shows enhanced antimicrobial activity, especially when used as a coating on fabrics.

Keywords:
advanced antimicrobial nanocoatingsclean technologygreen synthesishydroxyethyl cellulosesilver nanoparticles

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Green Chemistry

Background:

  • Optimizing nano-silver technologies is crucial for infection prevention and controlling microbial spread.
  • Advancements in manufacturing can improve cost-effectiveness and scalability of nano-silver products for diverse applications.
  • Existing methods for silver nanoparticle (AgNP) synthesis often require optimization for sustainability and efficacy.

Purpose of the Study:

  • To develop a versatile, eco-friendly, one-pot process for synthesizing silver nanoparticles (AgNPs) at room temperature.
  • To create a novel nano-hybrid material (AgHEC) with tunable properties by embedding AgNPs in a hydroxyethyl cellulose (HEC) hydrogel matrix.
  • To investigate the synthesis kinetics and physicochemical properties of the AgHEC system and evaluate its antimicrobial activity.

Main Methods:

  • Synthesis of AgHEC via a one-pot reaction using a quaternary ammonium salt of HEC as a capping and reducing agent at room temperature.
  • Characterization of AgNPs and the AgHEC matrix using techniques including DLS, FE-SEM, TEM, ELS, UV-VIS, XRD, viscosity measurements, and ICP-OES.
  • Systematic variation of synthesis parameters to explore the design space and its impact on physicochemical properties and antimicrobial efficacy.
  • Evaluation of antimicrobial activity in suspension and as a coating on nonwoven cellulose fabrics.

Main Results:

  • A novel AgHEC nano-hybrid material was successfully synthesized using a green, room-temperature process.
  • The AgHEC material exhibited tunable viscosity and physicochemical properties influenced by conversion grade and pH.
  • Optimized AgHEC formulations demonstrated enhanced antimicrobial activity, particularly when applied as a coating on cellulose fabrics, attributed to smaller AgNP size and synergistic effects with HEC.

Conclusions:

  • The developed one-pot, room-temperature synthesis offers a sustainable and versatile method for producing AgHEC nano-hybrids.
  • The AgHEC material shows significant potential for antimicrobial applications, especially in fabric coatings, due to its improved efficacy.
  • This research contributes to the advancement of cost-effective and scalable nano-silver technologies for infection control.