Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 125, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2019.105571
Keywords
Shape memory polymers; 4D printing; Magnetic field actuation; Complex structures
Funding
- National Natural Science Foundation of China [11632005, 11672086, 11802075]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [11421091]
- China Postdoctoral Science Foundation
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4D printed shape memory polymers and their composites are currently a highly topical research area. The potential applications for 4D printed smart materials are wide-reaching, with particular promise for personalized medicine. In this work, we 4D printed various structures made of biocompatible and biodegradable polylactic acid (PLA) and PLA/Fe3O4 composite filaments. The shape memory behaviors of the 4D printed structures triggered by magnetic field were investigated. The printed structures can return to their original shapes with a high speed in just a few seconds. Moreover, the structures like bone tissues printed by PLA/Fe3O4 composites filaments with 15% Fe3O4 were actuated by magnetic field at 27.5 kHz. During the shape recovery process, surface temperature of the printed structures is uniform and around 40 degrees C. This physiologically relevant operating temperature range is a highly attractive feature for potential healthcare and biomedical applications.
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