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TitleCarbon-based sputtered coatings for enhanced chitosan-based films properties
Author(s)Fernandes, C. P.
Velasco, Sebastian Calderon
Giraldo, Lina Fernanda Ballesteros
Cerqueira, Miguel A.
Pastrana, L. M.
Teixeira, J. A.
Ferreira, P. J.
Carvalho, S.
KeywordsCarbon-based coatings
Oxygen permeability
RF reactive magnetron sputtering
Issue date2018
JournalApplied Surface Science
CitationFernandes, C., Calderon V., S., Ballesteros, L. F., Cerqueira, M. A., Pastrana, L. M., Teixeira, J. A., … Carvalho, S. (2018, March). Carbon-based sputtered coatings for enhanced chitosan-based films properties. Applied Surface Science. Elsevier BV.
Abstract(s)In order to make bio-based packaging materials competitive in comparison to petroleum-based one, some of their properties need to be improved, among which gas permeability is of crucial importance. Thus, in this work, carbon-based coatings were applied on chitosan-based films by radiofrequency reactive magnetron sputtering aiming to improve their barrier properties. Chemical and morphological properties were evaluated in order to determine the effect of the coatings on the chemical structure, surface hydrophobicity and barrier properties of the system. Chemical analysis, performed by electron energy loss spectroscopy and Fourier transform infrared spectroscopy, suggests similar chemical characteristics among all coatings although higher incorporation of hydrogen as the acetylene flux increases was observed. On the other hand, scanning transmission electron microscopy revealed thatthe porosity ofthe carbon layer can be tailored by the acetylene flux. More importantly, the chitosan oxygen permeability showed a monotonic reduction as a function of the acetylene flux. This study opens up new opportunities to apply nanostructured coatings on bio-based polymer for enhanced oxygen barrier properties.
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AccessRestricted access (UMinho)
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series
CDF - GRF - Artigos/Papers (with refereeing)

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