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The Influence of Shape Changing Behaviors from 4D Printing through Material Extrusion Print Patterns and Infill Densities

Four-dimensional printing (4DP) is an approach of using Shape Memory Materials (SMMs) with additive manufacturing (AM) processes to produce printed parts that can deform over a determined amount of time. This research examines how Polylactic Acid (PLA), as a Shape Memory Polymer (SMP), can be progra...

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Autores principales: Nam, Seokwoo, Pei, Eujin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7503952/
https://www.ncbi.nlm.nih.gov/pubmed/32854309
http://dx.doi.org/10.3390/ma13173754
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author Nam, Seokwoo
Pei, Eujin
author_facet Nam, Seokwoo
Pei, Eujin
author_sort Nam, Seokwoo
collection PubMed
description Four-dimensional printing (4DP) is an approach of using Shape Memory Materials (SMMs) with additive manufacturing (AM) processes to produce printed parts that can deform over a determined amount of time. This research examines how Polylactic Acid (PLA), as a Shape Memory Polymer (SMP), can be programmed by manipulating the build parameters of material extrusion. In this research, a water bath experiment was used to show the results of the shape-recovery of bending and shape-recovery speed of the printed parts, according to the influence of the print pattern, infill density and recovery temperature (Tr). In terms of the influence of the print pattern, the ‘Quarter-cubic’ pattern with a 100% infill density showed the best recovery result; and the ‘Line’ pattern with a 20% infill density showed the worst recovery result. The ‘Cubic-subdivision’ pattern with a 20% infill density demonstrated the shortest recovery time; and the ‘Concentric’ pattern with a 100% infill density demonstrated the longest recovery time. The results also showed that a high temperature and high infill density provided better recovery, and a low temperature and low infill density resulted in poor recovery.
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spelling pubmed-75039522020-09-27 The Influence of Shape Changing Behaviors from 4D Printing through Material Extrusion Print Patterns and Infill Densities Nam, Seokwoo Pei, Eujin Materials (Basel) Article Four-dimensional printing (4DP) is an approach of using Shape Memory Materials (SMMs) with additive manufacturing (AM) processes to produce printed parts that can deform over a determined amount of time. This research examines how Polylactic Acid (PLA), as a Shape Memory Polymer (SMP), can be programmed by manipulating the build parameters of material extrusion. In this research, a water bath experiment was used to show the results of the shape-recovery of bending and shape-recovery speed of the printed parts, according to the influence of the print pattern, infill density and recovery temperature (Tr). In terms of the influence of the print pattern, the ‘Quarter-cubic’ pattern with a 100% infill density showed the best recovery result; and the ‘Line’ pattern with a 20% infill density showed the worst recovery result. The ‘Cubic-subdivision’ pattern with a 20% infill density demonstrated the shortest recovery time; and the ‘Concentric’ pattern with a 100% infill density demonstrated the longest recovery time. The results also showed that a high temperature and high infill density provided better recovery, and a low temperature and low infill density resulted in poor recovery. MDPI 2020-08-25 /pmc/articles/PMC7503952/ /pubmed/32854309 http://dx.doi.org/10.3390/ma13173754 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Nam, Seokwoo
Pei, Eujin
The Influence of Shape Changing Behaviors from 4D Printing through Material Extrusion Print Patterns and Infill Densities
title The Influence of Shape Changing Behaviors from 4D Printing through Material Extrusion Print Patterns and Infill Densities
title_full The Influence of Shape Changing Behaviors from 4D Printing through Material Extrusion Print Patterns and Infill Densities
title_fullStr The Influence of Shape Changing Behaviors from 4D Printing through Material Extrusion Print Patterns and Infill Densities
title_full_unstemmed The Influence of Shape Changing Behaviors from 4D Printing through Material Extrusion Print Patterns and Infill Densities
title_short The Influence of Shape Changing Behaviors from 4D Printing through Material Extrusion Print Patterns and Infill Densities
title_sort influence of shape changing behaviors from 4d printing through material extrusion print patterns and infill densities
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7503952/
https://www.ncbi.nlm.nih.gov/pubmed/32854309
http://dx.doi.org/10.3390/ma13173754
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