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dc.contributor.authorGedler, Gabriel
dc.contributor.authorAntunes, Marcelo de Sousa Pais
dc.contributor.authorVelasco Perero, José Ignacio
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica
dc.date.accessioned2015-07-21T11:13:06Z
dc.date.available2017-06-01T00:30:20Z
dc.date.created2015-05
dc.date.issued2015-05
dc.identifier.citationGedler, G., De Sousa Pais, M., Velasco J.I. Effects of graphene nanoplatelets on the morphology of polycarbonate-graphene composite foams prepared by supercritical carbon dioxide two-step foaming. "The Journal of supercritical fluids", Maig 2015, p. 167-174.
dc.identifier.issn0896-8446
dc.identifier.urihttp://hdl.handle.net/2117/76246
dc.description.abstractLow density polycarbonate foams containing different amounts of graphene nanoplatelets with variable cellular morphologies were prepared using a supercritical carbon dioxide two-step foaming process, which consisted of the dissolution of supercritical CO2 into moulded foam precursors and their later expansion by double contact restricted foaming. The effects of the processing conditions and graphene content on the cellular morphology of the obtained foams were investigated, showing that the addition of increasingly higher amounts of graphene nanoplatelets resulted in foams with increasingly smaller cell sizes and higher cell densities, due on the one hand to their effectiveness as cell nucleating agents and on the other to their platelet-like geometry, which limited CO2 loss during foaming due to a barrier effect mechanism. Especially significant was the addition of 5 wt.% graphene nanoplatelets, as the high concentration of graphene limited CO2 escape and cell coalescence during expansion, enabling to obtain highly expanded microcellular foams.
dc.format.extent8 p.
dc.language.isoeng
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials
dc.subject.lcshPolycarbonates
dc.subject.lcshGraphene
dc.subject.otherPolycarbonate foams
dc.subject.otherGraphene nanoplatelets
dc.subject.otherSupercritical carbon dioxide
dc.subject.otherTwo-step foaming
dc.titleEffects of graphene nanoplatelets on the morphology of polycarbonate-graphene composite foams prepared by supercritical carbon dioxide two-step foaming
dc.typeArticle
dc.subject.lemacPolicarbonats -- Proves
dc.subject.lemacGrafè
dc.contributor.groupUniversitat Politècnica de Catalunya. POLY2 - Polyfunctional polymeric materials
dc.identifier.doi10.1016/j.supflu.2015.02.005
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S0896844615000662
dc.rights.accessOpen Access
local.identifier.drac15584407
dc.description.versionPostprint (published version)
local.citation.authorGedler, G.; De Sousa Pais, M.; Velasco, J.I.
local.citation.publicationNameThe Journal of supercritical fluids
local.citation.volume100
local.citation.startingPage167
local.citation.endingPage174


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