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Development of poly(lactic acid) films with propolis as a source of active compounds: biodegradability, physical, and functional properties

2019-02Journal article Open access
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dc.contributor.authorUlloa, P. A.
dc.contributor.authorVidal, J.
dc.contributor.authorLopez de Dicastillo, C.
dc.contributor.authorRodriguez, F.
dc.contributor.authorGuarda, A.
dc.contributor.authorCruz, Rui
dc.contributor.authorGalotto, M. J.
dc.date.accessioned2020-07-24T10:52:50Z
dc.date.available2020-07-24T10:52:50Z
dc.date.issued2019-02
dc.description.abstractActive films (AFs) using poly(lactic acid) (PLA) as a polymeric matrix containing various propolis concentrations (5, 8.5, and 13%) as the active agent (AA) were developed using a casting method. The purpose was to determine the effects of the incorporation of AA on the physical properties of the films and to evaluate the antioxidant and antimicrobial activities. Tensile strength and elastic modulus of the AFs decreased relative to the control (PLA without AA). Introducing the active substances from propolis into the PLA also affected its thermal properties (glass transition). Adding AAs to the polymer generated more opacity with a green-yellowish color compared to the control. In addition, AFs exhibited reduced water vapor permeability as the AA concentration increased. Biodegradation assay showed that the AFs degraded faster than the control. AFs exhibited antioxidant activity, which was measured as the ability to scavenge free radicals (2,2-diphenyl-1-picrylhydrazyl and 2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonate)), due to the presence of bioactive compounds (phenolics). Antimicrobial activity was evaluated against Escherichia coli and showed a reduction over 4-log cycles. Therefore, incorporation of propolis is a useful strategy for the development of active packaging with antioxidant and antimicrobial effects, which increase the shelf life of food products. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47090.
dc.description.sponsorshipDireccion de Investigacion of Pontificia Universidad Catolica de Valparaiso [DI-037-362-14]
dc.description.sponsorshipUniversity of Santiago de Chile [1555-Vridei O81771GL_CONT]
dc.identifier.doi10.1002/app.47090
dc.identifier.issn0021-8995
dc.identifier.issn1097-4628
dc.identifier.urihttp://hdl.handle.net/10400.1/14412
dc.language.isoeng
dc.peerreviewedyes
dc.publisherWiley
dc.subjectGelatin-based films
dc.subjectAntimicrobial properties
dc.subjectAntioxidant activity
dc.subjectBarrier properties
dc.subjectChitosan
dc.subjectExtract
dc.subjectPolymer
dc.subjectProtein
dc.subjectBlends
dc.subjectStarch
dc.titleDevelopment of poly(lactic acid) films with propolis as a source of active compounds: biodegradability, physical, and functional properties
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue8
oaire.citation.startPage47090
oaire.citation.titleJournal of Applied Polymer Science
oaire.citation.volume136
person.familyNameCruz
person.givenNameRui
person.identifier1123160
person.identifier.ciencia-idAB11-B31E-1AF2
person.identifier.orcid0000-0002-0839-1881
person.identifier.scopus-author-id8522888800
rcaap.rightsopenAccess
rcaap.typearticle
relation.isAuthorOfPublication9da6a8ec-21fd-4591-af31-1680d0c7b1aa
relation.isAuthorOfPublication.latestForDiscovery9da6a8ec-21fd-4591-af31-1680d0c7b1aa

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