Porous PLAs with controllable density by FDM 3D printing and chemical foaming agent

Damanpack, A.R., Sousa, A. and Bodaghi, M. ORCID: 0000-0002-0707-944X, 2021. Porous PLAs with controllable density by FDM 3D printing and chemical foaming agent. Micromachines, 12 (8): 866. ISSN 2072-666X

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Abstract

This paper shows how fused decomposition modeling (FDM), as a three-dimensional (3D) printing technology, can engineer lightweight porous foams with controllable density. The tactic is based on the 3D printing of Poly Lactic Acid filaments with a chemical blowing agent, as well as experiments to explore how FDM parameters can control material density. Foam porosity is investigated in terms of fabrication parameters such as printing temperature and flow rate, which affect the size of bubbles produced during the layer-by-layer fabrication process. It is experimentally shown that printing temperature and flow rate have significant effects on the bubbles’ size, micro-scale material connections, stiffness and strength. An analytical equation is introduced to accurately simulate the experimental results on flow rate, density, and mechanical properties in terms of printing temperature. Due to the absence of a similar concept, mathematical model and results in the specialized literature, this paper is likely to advance the state-of-the-art lightweight foams with controllable porosity and density fabricated by FDM 3D printing technology.

Item Type: Journal article
Publication Title: Micromachines
Creators: Damanpack, A.R., Sousa, A. and Bodaghi, M.
Publisher: MDPI AG
Date: 23 July 2021
Volume: 12
Number: 8
ISSN: 2072-666X
Identifiers:
NumberType
10.3390/mi12080866DOI
1454286Other
Rights: © 2021 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/).
Divisions: Schools > School of Science and Technology
Record created by: Laura Ward
Date Added: 26 Jul 2021 08:20
Last Modified: 26 Jul 2021 08:20
URI: http://irep.ntu.ac.uk/id/eprint/43637

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