PLA toughening via bamboo-inspired 3D printed structural design

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dc.contributor.authorSvatík, Jurajcs
dc.contributor.authorLepcio, Petrcs
dc.contributor.authorOndreáš, Františekcs
dc.contributor.authorZárybnická, Kláracs
dc.contributor.authorZbončák, Marekcs
dc.contributor.authorMenčík, Přemyslcs
dc.contributor.authorJančář, Josefcs
dc.coverage.issue107405cs
dc.coverage.volume104cs
dc.date.accessioned2021-12-10T07:53:34Z
dc.date.available2021-12-10T07:53:34Z
dc.date.issued2021-12-01cs
dc.description.abstractBioinspired structures can attain mechanical properties unseen in conventional artificial materials. Specifically, the introduction of a cellular structure with a precisely designed distribution of cells, cell sizes, and cell walls is expected to enhance the mechanical response. Polylactic acid (PLA) is a biodegradable polymer produced from renewable resources with very interesting properties and good three-dimensional (3D) printing processability. However, its embrittlement during ageing at room temperature after a very short period of time (a few hours) significantly reduces its usability for advanced applications. Intense effort has been invested in improving its toughness via composition modification. However, this approach can worsen some other properties, make processing more difficult, and increase the carbon footprint. Therefore, fused deposition modelling (FDM) 3D printing was used to manufacture porous bamboo-inspired structures of unmodified PLA. The toughening of PLA solely by the pore gradient, which controlled the energy dissipation mechanism, was introduced for the first time. Improvement of the ductility and work at break was observed especially for notched specimens. Prevention of catastrophic failure could enable the use of gradient porous materials in structural components. The fundamental relationships and practical hints resulting from the work provide a foundation for the future design of toughened 3D printed structures.en
dc.formattextcs
dc.format.extent1-9cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationPOLYMER TESTING. 2021, vol. 104, issue 107405, p. 1-9.en
dc.identifier.doi10.1016/j.polymertesting.2021.107405cs
dc.identifier.issn0142-9418cs
dc.identifier.other173041cs
dc.identifier.urihttp://hdl.handle.net/11012/203141
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofPOLYMER TESTINGcs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S0142941821003494cs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/0142-9418/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectPorosity gradienten
dc.subject3D printingen
dc.subjectPLA tougheningen
dc.subjectPolymer foamsen
dc.subjectCellular structuresen
dc.titlePLA toughening via bamboo-inspired 3D printed structural designen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-173041en
sync.item.dbtypeVAVen
sync.item.insts2022.01.06 16:55:44en
sync.item.modts2022.01.06 16:15:09en
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilé polymerní materiály a kompozitcs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Sdílená laboratoř RP1cs
thesis.grantorVysoké učení technické v Brně. Fakulta chemická. Ústav chemie materiálůcs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilé biomateriálycs
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Pokročilé polymerní materiály a kompozit
Pokročilé biomateriály
Sdílená laboratoř RP1
Ústav chemie materiálů