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dc.contributor.authorWang, Bao
dc.contributor.authorWen, Tao
dc.contributor.authorZhang, Xiuqin
dc.contributor.authorTercjak Sliwinska, Agnieszka ORCID
dc.contributor.authorDong, Xia
dc.contributor.authorMüller Sánchez, Alejandro Jesús ORCID
dc.contributor.authorWang, Dujin
dc.contributor.authorCavallo, Dario
dc.date.accessioned2020-02-25T17:11:13Z
dc.date.available2020-02-25T17:11:13Z
dc.date.issued2019-08-14
dc.identifier.citationMacromolecules 52(16) : 6274-6284 (2019)es_ES
dc.identifier.issn0024-9297
dc.identifier.issn1520-5835
dc.identifier.urihttp://hdl.handle.net/10810/41445
dc.descriptionUnformatted post-print version of the accepted articlees_ES
dc.description.abstractThe nucleation process of poly(lactide) (PLA) on a series of fibers was studied by means of in-situ Polarized Optical Microscope (POM) during crystallization. Several synthetic and natural fibers (PLLA stereocomplex fibers (SC), PET, carbon, Kevlar, glass, hemp, linen and cellulose) were employed, and compared to custom-spun fiber of stereocomplex enantiomeric PLA blend. Meaningful differences in the nucleating ability towards PLA could be found for all the considered fibers. Stereocomplex PLA fibers display extremely high nucleating efficiency, with the development of a continuous transcrystalline morphology on their surface, up to high crystallization temperatures. Quantitative measurement of the nucleation rate allowed a comparison of the different fiber substrates in the light of classical heterogeneous nucleation theory, by considering the interfacial free energy difference parameter, Δσ, directly related to the nucleation barrier. The topography of the fibers surface was investigated by atomic force microscopy (AFM), and tentatively related to the measured nucleation ability. While a general effect of surface roughness on lowering the heterogeneous nucleation energy barrier can be deduced, deviations can be observed, in particular for carbon and stereocomplex PLA fibers. The different fiber wettability by PLA melt suggests that chemical interactions between the substrate and the crystallizing polymer also play a meaningful role in promoting the nucleation, although this aspect is generally disregarded in the literature - in favor of surface roughness. Moreover, the specific surface topography is shown to largely affect the density of available nucleation sites along the fiber.es_ES
dc.description.sponsorshipB.W. thanks the China Scholarship Council (CSC) for funding his Ph.D scholarship.This work has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No. 778092. A.J.M. acknowledges the financial support from Spanish Ministry of Science, Innovation and Universities (MAT2017-83014-C2-1-P).es_ES
dc.language.isoenges_ES
dc.publisherACS Publicationses_ES
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/778092es_ES
dc.relationinfo:eu-repo/grantAgreement/MINECO/MAT2017-83014-C2-1-Pes_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.subjectfiberses_ES
dc.subjectcrystallizationes_ES
dc.subjectcarbon fiberes_ES
dc.subjectnucleationes_ES
dc.subjectpolymerses_ES
dc.titleNucleation of Poly(lactide) on the Surface of Different Fiberses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.rights.holderCopyright © 2019 American Chemical Societyes_ES
dc.relation.publisherversionhttps://pubs.acs.org/doi/10.1021/acs.macromol.9b01078es_ES
dc.identifier.doi10.1021/acs.macromol.9b01078
dc.contributor.funderEuropean Commission
dc.departamentoesCiencia y tecnología de polímeroses_ES
dc.departamentoesIngeniería química y del medio ambientees_ES
dc.departamentoeuIngeniaritza kimikoa eta ingurumenaren ingeniaritzaes_ES
dc.departamentoeuPolimeroen zientzia eta teknologiaes_ES


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