4D printing of magneto‐thermo‐responsive PLA/PMMA/Fe3O4 nanocomposites with superior shape memory and remote actuation

Doostmohammadi, H, Baniassadi, M, Bodaghi, M ORCID: https://orcid.org/0000-0002-0707-944X and Baghani, M, 2024. 4D printing of magneto‐thermo‐responsive PLA/PMMA/Fe3O4 nanocomposites with superior shape memory and remote actuation. Macromolecular Materials and Engineering. ISSN 1438-7492

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Abstract

This study presents the development and 4D printing of magnetic shape memory polymers (MSMPs) utilizing a composite of polylactic acid (PLA), polymethyl methacrylate (PMMA), and Fe3O4 nanoparticles. The dynamic mechanical analysis reveals that the integration of Fe3O4 maintains the broad thermal transition without significantly affecting α-relaxation time, indicating high compatibility and homogeneous distribution of the nanoparticles within the polymer matrix. Field emission scanning electron microscopy further confirms the high compatibility of PLA and PMMA phases as well as uniform dispersion of Fe3O4 nanoparticles, essential for the effective transfer of heat during the shape memory process. Significantly, the incorporation of magnetic nanoparticles enables remote actuation capabilities, presenting a substantial advancement for biomedical applications. 4D-printed MSMP nanocomposites exhibit exceptional mechanical properties and rapid, efficient shape memory responses under both inductive and direct heating stimuli, achieving 100% shape fixity and 100% recovery within ≈85 s. They are proposed as promising candidates for biomedical implants, specifically for minimally invasive implantation of bone scaffolds, due to their rapid remote actuation, biocompatibility, and mechanical robustness. This research not only demonstrates the 4D printability of high-performance MSMPs but also introduces new possibilities for the application of MSMPs in regenerative medicine.

Item Type:	Journal article
Publication Title:	Macromolecular Materials and Engineering
Creators:	Doostmohammadi, H., Baniassadi, M., Bodaghi, M. and Baghani, M.
Publisher:	Wiley
Date:	12 June 2024
ISSN:	1438-7492
Identifiers:	Number Type 10.1002/mame.202400090 DOI 1907495 Other
Rights:	© 2024 The Author(s). Macromolecular Materials and Engineering published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Divisions:	Schools > School of Science and Technology
Record created by:	Laura Ward
Date Added:	27 Jun 2024 08:33
Last Modified:	27 Jun 2024 08:33
URI:	https://irep.ntu.ac.uk/id/eprint/51635

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