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dc.creatorFernández-d'Arlas Bidegáin, Borjaes_ES
dc.date.accessioned2020-05-12T11:15:19Z
dc.date.available2020-05-12T11:15:19Z
dc.date.issued2019
dc.identifier.issn2045-2322
dc.identifier.urihttps://hdl.handle.net/2454/36850
dc.description.abstractNovel bioplastic flms derived from wool keratins were prepared by protein solution in an alkaline mild oxidative method that splits disulphide (-S-S-) bonds. The native structure of the keratin macromolecules was partially modifed upon extraction as revealed by the decrease of the β-sheet to α-helices/coils ratio but high molecular weight fractions (31, 22 and 13 KDa) was retained permitting flm formation and plastic behaviour of flms. Keratin flms were plasticised with glycerol and sodium dodecyl sulphonic acid (SDS), which provided diferent hydrophobic character to bioplastics. Water content in the flms depend on the relative humidity (RH), being able to absorb up to 35 wt% H₂O at an ambient of 80% RH. Films were mechanically, thermally and optically analysed. The spectroscopic analyses revelled that these bioplastic flms absorb UV light, what is interesting for packaging applications. Thermogravimetric and thermomechanical analysis revealed high stability of keratin macromolecules up to 200°C with no inherent thermal transitions. Tough bioplastics (19±4 MJ∙ m−3) were obtained after thermal cross-linking with glycerol and formaldehyde outperforming mechanical properties previously reported for protein films.en
dc.description.sponsorshipBFD acknowledges 'Fundación Caja Navarra' and 'Obra Social La Caixa' in the framework of UPNA's program 'Captación de Talento' for funding the project 'Biomateriales a partir de queratinas de lanas y plumas'.en
dc.format.extent12 p.
dc.format.mimetypeapplication/pdfen
dc.language.isoengen
dc.publisherNature Researchen
dc.relation.ispartofScientific Reports, (2019) 9:14810en
dc.rights© The Author(s) 2019. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectWool keratinsen
dc.subjectBioplasticsen
dc.titleTough and functional cross-linked bioplastics from sheep wool keratinen
dc.typeinfo:eu-repo/semantics/articleen
dc.typeArtículo / Artikuluaes
dc.contributor.departmentUniversidad Pública de Navarra / Nafarroako Unibertsitate Publikoa. InaMat - Institute for Advanced Materialses_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessen
dc.rights.accessRightsAcceso abierto / Sarbide irekiaes
dc.identifier.doi10.1038/s41598-019-51393-5
dc.relation.publisherversionhttps://doi.org/10.1038/s41598-019-51393-5
dc.type.versioninfo:eu-repo/semantics/publishedVersionen
dc.type.versionVersión publicada / Argitaratu den bertsioaes
dc.contributor.funderUniversidad Pública de Navarra / Nafarroako Unibertsitate Publikoaes


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© The Author(s) 2019. This article is licensed under a Creative Commons Attribution 4.0 International
License, which permits use, sharing, adaptation, distribution and reproduction in any medium or
format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative
Commons license, and indicate if changes were made. The images or other third party material in this
article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the
material. If material is not included in the article’s Creative Commons license and your intended use is not permitted
by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the
copyright holder.
Except where otherwise noted, this item's license is described as © The Author(s) 2019. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.