Structure, gas-barrier properties and overall migration of poly(lactic acid) films coated with hydrogenated amorphous carbon layers

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Títol: Structure, gas-barrier properties and overall migration of poly(lactic acid) films coated with hydrogenated amorphous carbon layers
Autors: Mattioli, Samantha | Peltzer, Mercedes Ana | Fortunati, Elena | Armentano, Ilaria | Jiménez, Alfonso | Kenny, José María
Grups d'investigació o GITE: Análisis de Polímeros y Nanomateriales
Centre, Departament o Servei: Universidad de Alicante. Departamento de Química Analítica, Nutrición y Bromatología
Paraules clau: Hydrogenated amorphous carbon | Poly(lactic acid) films | Food packaging
Àrees de coneixement: Química Analítica
Data de publicació: de novembre-2013
Editor: Elsevier
Citació bibliogràfica: Carbon. 2013, 63: 274-282. doi:10.1016/j.carbon.2013.06.080
Resum: Hydrogenated amorphous carbon (a-C:H) films were grown on a poly(lactic acid) (PLA) substrate by means of a radiofrequency plasma-enhanced chemical vapour deposition (rf-PECVD) technique with different deposition times (5, 20 and 40 min). The main goal of this treatment was to increase the barrier properties of PLA, maintaining its original transparency and colour as well as controlling interactions with food simulants for packaging applications. Morphological, chemical, and mechanical properties of PLA/a-C:H systems were evaluated while permeability and overall migration tests were performed in order to determine the effect of the plasma treatment on the gas-barrier properties of PLA films and their application in food packaging. Morphological results suggested a good adhesion of the deposited layers onto the polymer surface and the samples treated for 5 and 20 min only slightly darkened the PLA film. X-ray photoelectron spectroscopy revealed that the structural properties of the carbon layer deposited onto the PLA film depend on the exposure time. PLA/a-C:H system treated for 5 min showed the highest barrier properties, while none of the studied samples exceeded the migration limit established by the current legislation, suggesting the suitability of these materials in packaging applications.
Patrocinadors: Authors gratefully acknowledge the financial support from the National Consortium of Materials Science and Technology (INSTM) and Spanish Ministry of Economy and Competiveness (MAT2011-28468-C02-01).
URI: http://hdl.handle.net/10045/37887
ISSN: 0008-6223 (Print) | 1873-3891 (Online)
DOI: 10.1016/j.carbon.2013.06.080
Idioma: eng
Tipus: info:eu-repo/semantics/article
Revisió científica: si
Versió de l'editor: http://dx.doi.org/10.1016/j.carbon.2013.06.080
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