Synthesis of sodium alginate–silver nanocomposites using plasma activated water and cold atmospheric plasma treatment

Nusrat Sharmin, Chengheng Pang, Izumi Sone, James Leon Walsh, Cecilia Górriz Fernández, Morten Sivertsvik, Estefanía Noriega Fernández

Research output: Journal PublicationArticlepeer-review

1 Citation (Scopus)

Abstract

In this study, sodium alginate (SA)-based, eco-friendly nanocomposites films were synthesized for potential food packaging applications using silver nitrate (AgNO3) as the metal precur-sor, reactive nitrogen and oxygen species (RNOS) created within plasma activated water (PAW), or through cold plasma treatment (CP) as reducing agent and SA as stabilizing agent. The formation of silver nanoparticles (AgNPs) was confirmed via the absorption peaks observed between 440 and 450 nm in UV-vis spectroscopy. The tensile strength (TS) and tensile modulus (TM) of the nanocom-posite films were significantly higher than those of the SA films. An increase in the TS was also observed as the AgNP concentration was increased from 1 to 5 mM. The storage modulus (G’) of the nanocomposite solution was higher than that of the SA solution. The synthesis of AgNPs resulted both in a higher solution viscosity and a more marked shear-thinning effect. The synthesized AgNPs showed antimicrobial activity against both Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria. The AgNPs were spherical in shape with an average size of 22 nm.

Original languageEnglish
Article number2306
JournalNanomaterials
Volume11
Issue number9
DOIs
Publication statusPublished - Sep 2021
Externally publishedYes

Keywords

  • Antimicrobial activity
  • Cold plasma
  • Mechanical properties
  • Plasma activated water
  • Silver nanoparticles

ASJC Scopus subject areas

  • Chemical Engineering (all)
  • Materials Science (all)

Fingerprint

Dive into the research topics of 'Synthesis of sodium alginate–silver nanocomposites using plasma activated water and cold atmospheric plasma treatment'. Together they form a unique fingerprint.

Cite this