4D Printing of Multifunctional and Biodegradable PLA-PBAT-Fe 3 O 4 Nanocomposites with Supreme Mechanical and Shape Memory Properties.

Autor: Yousefi MA; School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, 1417614411, Iran., Rahmatabadi D; School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, 1417614411, Iran., Baniassadi M; School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, 1417614411, Iran., Bodaghi M; Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham, NG11 8NS, UK., Baghani M; School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, 1417614411, Iran.
Jazyk: angličtina
Zdroj: Macromolecular rapid communications [Macromol Rapid Commun] 2024 Oct 14, pp. e2400661. Date of Electronic Publication: 2024 Oct 14.
DOI: 10.1002/marc.202400661
Abstrakt: 4D printing magneto-responsive shape memory polymers (SMPs) using biodegradable nanocomposites can overcome their low toughness and thermal resistance, and produce smart materials that can be controlled remotely without contact. This study presented the development of 3D/4D printable nanocomposites based on poly (lactic acid) (PLA)-poly (butylene adipate-co-terephthalate) (PBAT) blends and magnetite (Fe 3 O 4 ) nanoparticles. The nanocomposites are prepared by melt mixing PLA-PBAT blends with different Fe 3 O 4 contents (10, 15, and 20 wt%) and extruded into granules for material extrusion 3D printing. The morphology, dynamic mechanical thermal analysis (DMTA), mechanical properties, and shape memory behavior of the nanocomposites are investigated. The results indicated that the Fe 3 O 4 nanoparticles are preferentially distributed in the PBAT phases, enhancing the storage modulus, thermal stability, strength, elongation, toughness, shape fixity, and recovery of the nanocomposites. The optimal Fe 3 O 4 loading is found to be 10 wt%, as higher loadings led to nanoparticle agglomeration and reduced performance. The nanocomposites also exhibited fast shape memory response under thermal and magnetic activation due to the presence of Fe 3 O 4 nanoparticles. The 3D/4D printable nanocomposites demonstrated multifunctional multi-trigger shape-memory capabilities and potential applications in contactless and safe actuation.
(© 2024 The Author(s). Macromolecular Rapid Communications published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
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