Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/6709
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dc.contributor.authorUysal Ünalan, İlke-
dc.contributor.authorBoyacı, Derya-
dc.contributor.authorTrabattoni, Silvia-
dc.contributor.authorTavazzi, Silvia-
dc.contributor.authorFarris, Stefano-
dc.date.accessioned2018-01-18T11:22:01Z-
dc.date.available2018-01-18T11:22:01Z-
dc.date.issued2017-09-
dc.identifier.citationUysal Ünalan, İ., Boyacı, D., Trabattoni, S., Tavazzi, S., and Farris, S. (2017). Transparent pullulan/mica nanocomposite coatings with outstanding oxygen barrier properties. Nanomaterials, 7(9). doi:10.3390/nano7090281en_US
dc.identifier.issn2079-4991-
dc.identifier.urihttp://doi.org/10.3390/nano7090281-
dc.identifier.urihttp://hdl.handle.net/11147/6709-
dc.description.abstractThis study presents a new bionanocomposite coating on poly(ethylene terephthalate) (PET) made of pullulan and synthetic mica. Mica nanolayers have a very high aspect ratio (α), at levels much greater than that of conventional exfoliated clay layers (e.g., montmorillonite). A very small amount of mica (0.02 wt %, which is φ ≈ 0.00008) in pullulan coatings dramatically improved the oxygen barrier performance of the nanocomposite films under dry conditions, however, this performance was partly lost as the environmental relative humidity (RH) increased. This outcome was explained in terms of the perturbation of the spatial ordering of mica sheets within the main pullulan phase, because of RH fluctuations. This was confirmed by modelling of the experimental oxygen transmission rate (OTR) data according to Cussler’s model. The presence of the synthetic nanobuilding block (NBB) led to a decrease in both static and kinetic coefficients of friction, compared with neat PET (≈12% and 23%, respectively) and PET coated with unloaded pullulan (≈26% reduction in both coefficients). In spite of the presence of the filler, all of the coating formulations did not significantly impair the overall optical properties of the final material, which exhibited haze values below 3% and transmittance above 85%. The only exception to this was represented by the formulation with the highest loading of mica (1.5 wt %, which is φ ≈ 0.01). These findings revealed, for the first time, the potential of the NBB mica to produce nanocomposite coatings in combination with biopolymers for the generation of new functional features, such as transparent high oxygen barrier materials.en_US
dc.description.sponsorshipUniversity of Milan-Action "Research Support Plan" (15-6-3024000-402)en_US
dc.language.isoenen_US
dc.publisherMDPI Multidisciplinary Digital Publishing Instituteen_US
dc.relation.ispartofNanomaterialsen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectCoefficient of frictionen_US
dc.subjectOxygen barrieren_US
dc.subjectPullulanen_US
dc.subjectMicaen_US
dc.subjectNanocompositesen_US
dc.titleTransparent pullulan/mica nanocomposite coatings with outstanding oxygen barrier propertiesen_US
dc.typeArticleen_US
dc.authoridTR126577en_US
dc.institutionauthorBoyacı, Derya-
dc.departmentIzmir Institute of Technology. Food Engineeringen_US
dc.identifier.volume7en_US
dc.identifier.issue9en_US
dc.identifier.wosWOS:000411522600050
dc.identifier.scopusSCOPUS:2-s2.0-85030261415
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.doi10.3390/nano7090281-
dc.relation.doi10.3390/nano7090281en_US
dc.coverage.doi10.3390/nano7090281en_US
item.cerifentitytypePublications-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairetypeArticle-
item.grantfulltextopen-
item.languageiso639-1en-
item.fulltextWith Fulltext-
Appears in Collections:Food Engineering / Gıda Mühendisliği
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
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