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Sonochemical synthesis and stabilization of concentrated antimicrobial silver-chitosan nanoparticle dispersions

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10.1002/APP.45136
 
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hdl:2117/104415

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Francesko, Antonio
Petkova, Petya
Mendoza Gómez, ErnestoMés informació
Tzanov, TzankoMés informacióMés informacióMés informació
Cano Fossas, Marta
Fernandes, Margarita M.
Document typeArticle
Defense date2017-08
PublisherWiley
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
ProjectPROTECT - Pre-commercial lines for production of surface nanostructured antimicrobial and anti-biofilm textiles, medical devices and water treatment membranes (EC-H2020-720851)
Abstract
This work reports on a green synthetic route to produce concentrated aqueous dispersions of silver nanoparticles (AgNP) employing high-intensity ultrasound (US) and chitosan (CS) as a non-toxic reducing agent for Ag1 salts and AgNP stabilizer. The sonication simultaneously boosted the synthesis and improved the stability of the AgNP, capping them with CS. Hybrid AgNP-CS antimicrobial dispersions, stable for at least 6 months, were synthesized in a simple single step process. The use of US allowed for applying relatively mild processing temperatures (608C) and reaction time between 30 min and 3 h to obtain concentrated disper- sions of AgNP that otherwise could not be obtained even after 72 h under mechanical stirring at the same reaction conditions. Upon sonication spherical AgNP-CS with a size between 60 and 100 nm were generated, in contrast to the average diameter of 200 nm of the particles obtained by stirring. The antibacterial efficiency of the AgNP-CS hybrids was evaluated against the medically relevant pathogens Staphylococcus aureus and Escherichia coli. The US-synthesized AgNP-CS showed more than 3-fold higher antibacterial activity compared to the particles obtained under stirring, due to their higher concentration and smaller size.
CitationFrancesko, A., Cano, M., Petkova, P., Fernandes, M.M., Mendoza, E., Tzanov, T. Sonochemical synthesis and stabilization of concentrated antimicrobial silver-chitosan nanoparticle dispersions. "Journal of applied polymer science", Agost 2017, vol. 134, núm. 30, p. 45136 (1)-45136 (8). 
URIhttp://hdl.handle.net/2117/104415
DOI10.1002/APP.45136
ISSN1097-4628
Publisher versionhttp://onlinelibrary.wiley.com.recursos.biblioteca.upc.edu/doi/10.1002/app.45136/epdf
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  • Departament de Física - Articles de revista [1.714]
  • GBMI - Grup de Biotecnologia Molecular i Industrial - Articles de revista [164]
  • Departament d'Enginyeria Química - Articles de revista [1.918]
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