Magnetic Multimaterial Printing for Multimodal Shape Transformation with Tunable Properties and Shiftable Mechanical Behaviors
Magnetic Multimaterial Printing for Multimodal Shape Transformation with Tunable Properties and Shiftable Mechanical Behaviors
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DOI：
10.1021/acsami.0c13863
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发表时间：
2021-03-24
影响因子：
9.5
通讯作者：
Zhao, Ruike
中科院分区：
文献类型：
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作者：
Ma, Chunping;Wu, Shuai;Zhao, Ruike
磁性软材料在软机器人、执行器、超材料和生物医学设备等方面显示出巨大的潜力，因为它们能够在外加磁场的作用下自由、快速、可逆地进行形状重构以及可控的动态运动。近年来，在形状记忆聚合物中引入硬磁性粒子的磁性形状记忆聚合物(MSMP)通过在一个材料系统中实现可编程的、不受束缚的、快速的、可逆的形状变换和形状锁定，显示出优异的形状操纵性能。在这项工作中，我们开发了一种用于MSM和M-SMPS复杂结构集成的多材料打印技术，以探索它们增强的多峰形状变换和可调性能。通过热和磁的协同驱动，我们展示了具有不同形状构型的多种变形模式，这进一步使得具有可调物理性质的活性超材料具有可调的物理性质，如符号变化的泊松比。由于M-MSP/MSM超材料的多物理响应，一个明显的特征是它们能够在各种全球力学行为之间转换，如膨胀、收缩、剪切和弯曲。我们预计，多材料打印技术将为多功能磁性材料的制备开辟新的途径。
Magnetic soft materials (MSMs) have shown potential in soft robotics, actuators, metamaterials, and biomedical devices because they are capable of untethered, fast, and reversible shape reconfigurations as well as controllable dynamic motions under applied magnetic fields. Recently, magnetic shape memory polymers (MSMPs) that incorporate hard magnetic particles in shape memory polymers demonstrated superior shape manipulation performance by realizing reprogrammable, untethered, fast, and reversible shape transformation and shape locking in one material system. In this work, we develop a multimaterial printing technology for the complex structural integration of MSMs and M-SMPs to explore their enhanced multimodal shape transformation and tunable properties. By cooperative thermal and magnetic actuation, we demonstrate multiple deformation modes with distinct shape configurations, which further enable active metamaterials with tunable physical properties such as sign-change Poisson's ratio. Because of the multiphysics response of the M-MSP/MSM metamaterials, one distinct feature is their capability of shifting between various global mechanical behaviors such as expansion, contraction, shear, and bending. We anticipate that the multimaterial printing technique opens new avenues for the fabrication of multifunctional magnetic materials.