Magnetic programming of 4D printed shape memory composite structures
Magnetic programming of 4D printed shape memory composite structures
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4D 打印形状记忆复合结构的磁编程
DOI：
10.1016/j.compositesa.2019.105571
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发表时间：
2019-10-01
影响因子：
8.7
通讯作者：
Leng, Jinsong
中科院分区：
文献类型：
--
作者：
Zhang, Fenghua;Wang, Linlin;Leng, Jinsong
4D打印形状记忆聚合物及其复合材料是目前备受关注的研究领域。 4D 打印智能材料的潜在应用范围广泛，特别是个性化医疗。在这项工作中，我们 4D 打印了由生物相容性和可生物降解的聚乳酸 (PLA) 和 PLA/Fe3O4 复合长丝制成的各种结构。研究了磁场触发的 4D 打印结构的形状记忆行为。打印的结构可以在短短几秒钟内高速恢复到原来的形状。此外，由含有 15% Fe3O4 的 PLA/Fe3O4 复合材料丝打印的骨组织等结构由 27.5 kHz 的磁场驱动。在形状恢复过程中，打印结构的表面温度是均匀的，约为 40 摄氏度。这种生理相关的工作温度范围对于潜在的医疗保健和生物医学应用来说是一个极具吸引力的特征。
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.