Electrospun composite mats of alginate with embedded silver nanoparticles

Synthesis and characterization
  • Maila Castellano
  • Marina AlloisioEmail author
  • Rimah Darawish
  • Andrea Dodero
  • Silvia Vicini


In this work, a nanocomposite material based on alginate (Alg) and silver nanoparticles (AgNPs) was prepared by the synthesis “in situ” of the metal cores in the polymer solution through a wet, bottom-up approach. The formation of AgNPs within the alginate matrix (Alg–Ag) was confirmed by spectroscopic and morphological investigation. The nanocomposite material was then employed in combination with poly(ethylene oxide) for the production of crosslinked alginate membranes by electrospinning technique, following a simple and effective protocol optimized to obtain nano- to microscaled fibers. Field emission scanning electron microscopy (FESEM) studies on the composite membranes indicated that AgNPs of slightly increased dimensions are well distributed in the electrospun mats, thus proving that the electrospinning process does not significantly alter the morphology of the metal nanofillers and can be successfully adopted for the fabrication of nanofibers. In view of their potential applications in biomedical fields and food industry as antibacterial material, the nanocomposite mats were tested against thermal and UV sterilization, anti-mold treatment (NaClO) and environmental changes (pH) and their stability was monitored by means of thermogravimetric (TGA) and morphological (FESEM) techniques.


Sodium alginate Silver nanoparticles Nanocomposite mats Electrospinning Thermogravimetric analysis 


Compliance with ethical standards

Conflict of interest

All the authors declare that they have no conflict of interest.

Supplementary material

10973_2018_7979_MOESM1_ESM.docx (709 kb)
Supplementary material 1 (DOCX 708 kb)


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  • Maila Castellano
    • 1
  • Marina Alloisio
    • 1
    Email author
  • Rimah Darawish
    • 1
  • Andrea Dodero
    • 1
  • Silvia Vicini
    • 1
  1. 1.Dipartimento di Chimica e Chimica IndustrialeUniversità di GenovaGenoaItaly

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