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One- vs two-step preparation of antimicrobial coatings composed of laser ablated copper nanoparticles and poly-lactic acid

Published online by Cambridge University Press:  25 May 2012

Daniela Longano
Affiliation:
Dipartimento di Chimica, Università degli Studi di Bari “Aldo Moro”, Via Orabona 4, 70126 Bari, Italy.
Nicoletta Ditaranto
Affiliation:
Dipartimento di Chimica, Università degli Studi di Bari “Aldo Moro”, Via Orabona 4, 70126 Bari, Italy.
Nicola Cioffi
Affiliation:
Dipartimento di Chimica, Università degli Studi di Bari “Aldo Moro”, Via Orabona 4, 70126 Bari, Italy.
Francesca Di Niso
Affiliation:
CNR-IFN, Istituto di Fotonica e Nanotecnologie, Dipartimento Interateneo di Fisica “M. Merlin”, Via Amendola 173, 70126 Bari, Italy.
Teresa Sibillano
Affiliation:
CNR-IFN, Istituto di Fotonica e Nanotecnologie, Dipartimento Interateneo di Fisica “M. Merlin”, Via Amendola 173, 70126 Bari, Italy.
Francesco P. Mezzapesa
Affiliation:
CNR-IFN, Istituto di Fotonica e Nanotecnologie, Dipartimento Interateneo di Fisica “M. Merlin”, Via Amendola 173, 70126 Bari, Italy.
Antonio Ancona
Affiliation:
CNR-IFN, Istituto di Fotonica e Nanotecnologie, Dipartimento Interateneo di Fisica “M. Merlin”, Via Amendola 173, 70126 Bari, Italy.
Amalia Conte
Affiliation:
BIOAGROMED, Istituto per la Ricerca e le Applicazioni Biotecnologiche per la Sicurezza e la Valorizzazione dei Prodotti Tipici e di Qualità, Via Napoli 25, 71100 Foggia, Italy
Matteo A. Del Nobile
Affiliation:
BIOAGROMED, Istituto per la Ricerca e le Applicazioni Biotecnologiche per la Sicurezza e la Valorizzazione dei Prodotti Tipici e di Qualità, Via Napoli 25, 71100 Foggia, Italy
Luigia Sabbatini
Affiliation:
Dipartimento di Chimica, Università degli Studi di Bari “Aldo Moro”, Via Orabona 4, 70126 Bari, Italy.
Luisa Torsi
Affiliation:
Dipartimento di Chimica, Università degli Studi di Bari “Aldo Moro”, Via Orabona 4, 70126 Bari, Italy.
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Abstract

Copper-containing nanomaterials have been developed as antimicrobial additives for food packaging applications. These nano-antimicrobials are composed of copper nanoparticles (CuNPs) embedded in poly-lactic acid (PLA), which has been selected as a biodegradable polymer matrix. Copper nanostructures have been synthesized by laser ablation following two different protocols: (I) one-pot synthesis in presence of PLA and (II) in absence of polymer matrix. In the latter route, the as prepared CuNPs suspension has been subsequently mixed to a PLA solution. The resulting dispersions have been directly drop-cast on several substrates. Nanoantimicrobials have been characterized by UV-Vis and x-ray photoelectron spectroscopies, and transmission electron microscopy. The kinetics of copper release in aqueous solution from antimicrobial nanomaterials have been studied by means of Electro-Thermal Atomic Absorption Spectroscopy. Finally, preliminary biological tests have been performed on Pseudomonas species by JIS methods (Japanese Industrial Standard, JIS Z 2801:2000).

Type
Articles
Copyright
Copyright © Materials Research Society 2012

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One- vs two-step preparation of antimicrobial coatings composed of laser ablated copper nanoparticles and poly-lactic acid
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