dc.contributor.author | Aramburu Ocáriz, Nora | |
dc.contributor.author | Otaegi Tena, Itziar | |
dc.contributor.author | Guerrica Echevarría Estanga, Gonzalo María | |
dc.date.accessioned | 2019-05-15T10:33:40Z | |
dc.date.available | 2019-05-15T10:33:40Z | |
dc.date.issued | 2019-03 | |
dc.identifier.citation | Polymers 11(3) : (2019) // Article ID 435 | es_ES |
dc.identifier.issn | 2073-4360 | |
dc.identifier.uri | http://hdl.handle.net/10810/32808 | |
dc.description.abstract | Biobased thermoplastic polyurethane (bTPU)/unmodified graphene (GR) nanocomposites (NCs) were obtained by melt-mixing in a lab-scaled conventional twin-screw extruder. Alternatively, GR was also modified with an ionic liquid (GR-IL) using a simple preparation method with the aim of improving the dispersion level. XRD diffractograms indicated a minor presence of well-ordered structures in both bTPU/GR and bTPU/GR-IL NCs, which also showed, as observed by TEM, nonuniform dispersion. Electrical conductivity measurements pointed to an improved dispersion level when GR was modified with the IL, because the bTPU/GR-IL NCs showed a significantly lower electrical percolation threshold (1.99 wt%) than the bTPU/GR NCs (3.21 wt%), as well as higher conductivity values. Young's modulus increased upon the addition of the GR (by 65% with 4 wt%), as did the yield strength, while the ductile nature of the bTPU matrix maintained in all the compositions, with elongation at break values above 200%. This positive effect on the mechanical properties caused by the addition of GR maintained or slightly increased when GR-IL was used, pointing to the success of this method of modifying the nanofiller to obtain bTPU/GR NCs. | es_ES |
dc.description.sponsorship | This research was funded by MINECO (Spanish Government), project CTO 2013-4113-R; the Basque Government, project IT611-13; and the University of the Basque Country, UFI 11/56. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | MDPI | es_ES |
dc.relation | info:eu-repo/grantAgreement/MINECO/CTO 2013-4113-R | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/es/ | * |
dc.subject | nanocomposites | es_ES |
dc.subject | graphene | es_ES |
dc.subject | melt processing | es_ES |
dc.subject | mechanical properties | es_ES |
dc.subject | electrical conductivity | es_ES |
dc.subject | polypropylene nanocomposites | es_ES |
dc.subject | graphene sheets | es_ES |
dc.subject | composites | es_ES |
dc.subject | nanotubes | es_ES |
dc.title | Using an Ionic Liquid to Reduce the Electrical Percolation Threshold in Biobased Thermoplastic Polyurethane/Graphene Nanocomposites | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.holder | This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0). | es_ES |
dc.rights.holder | Atribución 3.0 España | * |
dc.relation.publisherversion | https://www.mdpi.com/2073-4360/11/3/435 | es_ES |
dc.identifier.doi | 10.3390/polym11030435 | |
dc.departamentoes | Física de materiales | es_ES |
dc.departamentoeu | Materialen fisika | es_ES |