Synthesis of Sodium Alginate-Silver Nanocomposites Using Plasma Activated Water and Cold Atmospheric Plasma Treatment.

Autor: Sharmin N; Department of Food Safety and Quality, Nofima AS, Osloveien 1, 1430 Ås, Norway., Pang C; Department of Chemical and Environmental Engineering, University of Nottingham Ningbo China, Ningbo 315100, China., Sone I; Department of Processing Technology, Nofima AS, Richard Johnsens Gate 4, 4021 Stavanger, Norway., Walsh JL; Centre for Plasma Microbiology, Department of Electrical Engineering & Electronics, University of Liverpool, Liverpool L69 3BX, UK., Fernández CG; IES Escultor Juan de Villanueva, N-634, s/n, 33519 Pola de Siero, Spain., Sivertsvik M; Department of Processing Technology, Nofima AS, Richard Johnsens Gate 4, 4021 Stavanger, Norway., Fernández EN; Department of Processing Technology, Nofima AS, Richard Johnsens Gate 4, 4021 Stavanger, Norway.; European Food Safety Authority, Via Carlo Magno 1A, 43126 Parma, Italy.
Jazyk: angličtina
Zdroj: Nanomaterials (Basel, Switzerland) [Nanomaterials (Basel)] 2021 Sep 05; Vol. 11 (9). Date of Electronic Publication: 2021 Sep 05.
DOI: 10.3390/nano11092306
Abstrakt: In this study, sodium alginate (SA)-based, eco-friendly nanocomposites films were synthesized for potential food packaging applications using silver nitrate (AgNO 3 ) as the metal precursor, 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 nanocomposite 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.
Databáze: MEDLINE
Externí odkaz: