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dc.contributor.authorAranberri, Ibon
dc.contributor.authorMontes, Sarah
dc.contributor.authorAzcune, Itxaso
dc.contributor.authorRekondo, Alaitz
dc.contributor.authorGrande, Hans-Jürgen
dc.date.accessioned2018-09-24T08:30:50Z
dc.date.available2018-09-24T08:30:50Z
dc.date.issued2018-09-21
dc.identifier.citationPolymers 10(10) : (2018) // Article ID 1056es_ES
dc.identifier.urihttp://hdl.handle.net/10810/28803
dc.description.abstractFeathers are made of keratin, a fibrous protein with high content of disulfide-crosslinks and hydrogen-bonds. Feathers have been mainly used as reinforcing fiber in the preparation of biocomposites with a wide variety of polymers, also poly(urea-urethane)s. Surface compatibility between the keratin fiber and the matrix is crucial for having homogenous, high quality composites with superior mechanical properties. Poly(urea-urethane) type polymers are convenient for this purpose due to the presence of polar functionalities capable of forming hydrogen-bonds with keratin. Here, we demonstrate that the interfacial compatibility can be further enhanced by incorporating sulfur moieties in the polymer backbone that lead to new fiber-matrix interactions. We comparatively studied two analogous thermoplastic poly(urea-urethane) elastomers prepared starting from the same isocyanate-functionalized polyurethane prepolymer and two aromatic diamine chain extenders, bis(4-aminophenyl) disulfide (TPUU-SS) and the sulfur-free counterpart bis(4-aminophenyl) methane (TPUU). Then, biocomposites with high feather loadings (40, 50, 60 and 75 wt %) were prepared in a torque rheometer and hot-compressed into flexible sheets. Mechanical characterization showed that TPUU-SS based materials underwent higher improvement in mechanical properties than biocomposites made of the reference TPUU (up to 7.5-fold higher tensile strength compared to neat polymer versus 2.3-fold). Field Emission Scanning Electron Microscope (FESEM) images also provided evidence that fibers were completely embedded in the TPUU-SS matrix. Additionally, density, thermal stability, and water absorption of the biocomposites were thoroughly characterized.es_ES
dc.description.sponsorshipThis work was supported by KaRMA2020 project. This project has received funding from the European Union’s Horizon 2020 Research and Innovation program under Grant Agreement n 723268.es_ES
dc.language.isospaes_ES
dc.publisherMDPIes_ES
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/723268es_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.subjectbiocompositeses_ES
dc.subjectthermoplastic poly(urea-urethane)ses_ES
dc.subjectdisulfide bondes_ES
dc.subjectchicken featherses_ES
dc.subjectfibreses_ES
dc.titleFlexible Biocomposites with Enhanced Interfacial Compatibility Based on Keratin Fibers and Sulfur-Containing Poly(urea-urethane)ses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.rights.holderAtribución-NoComercial-SinDerivadas 3.0 España*
dc.identifier.doi10.3390/polym10101056
dc.contributor.funderEuropean Commission


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