PLA toughening via bamboo-inspired 3D printed structural design

Bioinspired 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...

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Autores principales:	Juraj Svatík, Petr Lepcio, František Ondreáš, Klára Zárybnická, Marek Zbončák, Přemysl Menčík, Josef Jančář
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Porosity gradient 3D printing PLA toughening Polymer foams Cellular structures Polymers and polymer manufacture TP1080-1185
Acceso en línea:	https://doaj.org/article/7426cdd5bff84836817520e2fb7f6696
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id	oai:doaj.org-article:7426cdd5bff84836817520e2fb7f6696
record_format	dspace
spelling	oai:doaj.org-article:7426cdd5bff84836817520e2fb7f66962021-11-14T04:28:10ZPLA toughening via bamboo-inspired 3D printed structural design0142-941810.1016/j.polymertesting.2021.107405https://doaj.org/article/7426cdd5bff84836817520e2fb7f66962021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0142941821003494https://doaj.org/toc/0142-9418Bioinspired 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.Juraj SvatíkPetr LepcioFrantišek OndreášKlára ZárybnickáMarek ZbončákPřemysl MenčíkJosef JančářElsevierarticlePorosity gradient3D printingPLA tougheningPolymer foamsCellular structuresPolymers and polymer manufactureTP1080-1185ENPolymer Testing, Vol 104, Iss , Pp 107405- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Porosity gradient 3D printing PLA toughening Polymer foams Cellular structures Polymers and polymer manufacture TP1080-1185
spellingShingle	Porosity gradient 3D printing PLA toughening Polymer foams Cellular structures Polymers and polymer manufacture TP1080-1185 Juraj Svatík Petr Lepcio František Ondreáš Klára Zárybnická Marek Zbončák Přemysl Menčík Josef Jančář PLA toughening via bamboo-inspired 3D printed structural design
description	Bioinspired 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.
format	article
author	Juraj Svatík Petr Lepcio František Ondreáš Klára Zárybnická Marek Zbončák Přemysl Menčík Josef Jančář
author_facet	Juraj Svatík Petr Lepcio František Ondreáš Klára Zárybnická Marek Zbončák Přemysl Menčík Josef Jančář
author_sort	Juraj Svatík
title	PLA toughening via bamboo-inspired 3D printed structural design
title_short	PLA toughening via bamboo-inspired 3D printed structural design
title_full	PLA toughening via bamboo-inspired 3D printed structural design
title_fullStr	PLA toughening via bamboo-inspired 3D printed structural design
title_full_unstemmed	PLA toughening via bamboo-inspired 3D printed structural design
title_sort	pla toughening via bamboo-inspired 3d printed structural design
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/7426cdd5bff84836817520e2fb7f6696
work_keys_str_mv	AT jurajsvatik platougheningviabambooinspired3dprintedstructuraldesign AT petrlepcio platougheningviabambooinspired3dprintedstructuraldesign AT frantisekondreas platougheningviabambooinspired3dprintedstructuraldesign AT klarazarybnicka platougheningviabambooinspired3dprintedstructuraldesign AT marekzboncak platougheningviabambooinspired3dprintedstructuraldesign AT premyslmencik platougheningviabambooinspired3dprintedstructuraldesign AT josefjancar platougheningviabambooinspired3dprintedstructuraldesign
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PLA toughening via bamboo-inspired 3D printed structural design

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