Publication detail

PLA toughening via bamboo-inspired 3D printed structural design

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

9

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"
}