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SVATÍK, J. LEPCIO, P. ONDREÁŠ, F. ZÁRYBNICKÁ, K. ZBONČÁK, M. MENČÍK, P. JANČÁŘ, J.
Original Title
PLA toughening via bamboo-inspired 3D printed structural design
Type
journal article in Web of Science
Language
English
Original Abstract
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.
Keywords
Porosity gradient, 3D printing, PLA toughening, Polymer foams, Cellular structures
Authors
SVATÍK, J.; LEPCIO, P.; ONDREÁŠ, F.; ZÁRYBNICKÁ, K.; ZBONČÁK, M.; MENČÍK, P.; JANČÁŘ, J.
Released
1. 12. 2021
Publisher
Elsevier
Location
London, UK
ISBN
0142-9418
Periodical
POLYMER TESTING
Year of study
104
Number
107405
State
United Kingdom of Great Britain and Northern Ireland
Pages from
1
Pages to
9
Pages count
URL
https://www.sciencedirect.com/science/article/pii/S0142941821003494
Full text in the Digital Library
http://hdl.handle.net/11012/203141
BibTex
@article{BUT173041, author="Juraj {Svatík} and Petr {Lepcio} and František {Ondreáš} and Klára {Zárybnická} and Marek {Zbončák} and Přemysl {Menčík} and Josef {Jančář}", title="PLA toughening via bamboo-inspired 3D printed structural design", journal="POLYMER TESTING", year="2021", volume="104", number="107405", pages="1--9", doi="10.1016/j.polymertesting.2021.107405", issn="0142-9418", url="https://www.sciencedirect.com/science/article/pii/S0142941821003494" }