A new strategy for achieving shape memory effects in 4D printed two-layer composite structures

Rahmatabadi, D, Aberoumand, M, Soltanmohammadi, K, Soleyman, E, Ghasemi, I, Baniassadi, M, Abrinia, K, Zolfagharian, A, Bodaghi, M ORCID: https://orcid.org/0000-0002-0707-944X and Baghani, M, 2022. A new strategy for achieving shape memory effects in 4D printed two-layer composite structures. Polymers, 14 (24): 5446. ISSN 2073-4360

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Abstract

In this study, a new strategy and design for achieving a shape memory effect (SME) and 4D printed two-layer composite structures is unveiled, thanks to fused deposition modeling (FDM) biomaterial printing of commercial filaments, which do not have an SME. We used ABS and PCL as two well-known thermoplastics, and TPU as elastomer filaments that were printed in a two-layer structure. The thermoplastic layer plays the role of constraint for the elastomeric layer. A rubber-to-glass transition of the thermoplastic layer acts as a switching phenomenon that provides the capability of stabilizing the temporary shape, as well as storing the deformation stress for the subsequent recovery of the permanent shape by phase changing the thermoplastic layer in the opposite direction. The results show that ABS–TPU had fixity and recovery ratios above 90%. The PCL–TPU composite structure also demonstrated complete recovery, but its fixity was 77.42%. The difference in the SME of the two composite structures is related to the transition for each thermoplastic and programming temperature. Additionally, in the early cycles, the shape-memory performance decreased, and in the fourth and fifth cycles, it almost stabilized. The scanning electron microscopy (SEM) photographs illustrated superior interfacial bonding and part integrity in the case of multi-material 3D printing.

Item Type:	Journal article
Publication Title:	Polymers
Creators:	Rahmatabadi, D., Aberoumand, M., Soltanmohammadi, K., Soleyman, E., Ghasemi, I., Baniassadi, M., Abrinia, K., Zolfagharian, A., Bodaghi, M. and Baghani, M.
Publisher:	MDPI AG
Date:	13 December 2022
Volume:	14
Number:	24
ISSN:	2073-4360
Identifiers:	Number Type 10.3390/polym14245446 DOI 1639070 Other
Rights:	© 2022 by the authors This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Divisions:	Schools > School of Science and Technology
Record created by:	Jeremy Silvester
Date Added:	27 Jan 2023 09:21
Last Modified:	27 Jan 2023 09:53
URI:	https://irep.ntu.ac.uk/id/eprint/48073

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