用于模块化组装和可重构变形结构的磁性动态聚合物
Magnetic Dynamic Polymers for Modular Assembling and Reconfigurable Morphing Architectures
摘要：
形状变形磁性软材料由软聚合物基质中的磁性颗粒组成，可以可逆地，远程地，快速地改变形状，在致动器，软机器人和生物医学设备中找到各种应用。为了实现按需和复杂的形状变形，非常期望制造具有复杂几何形状和磁化分布的结构。在这里，我们报告的磁性动态聚合物复合材料组成的硬磁微粒在动态聚合物网络与热响应可逆的联系，它允许的功能，包括有针对性的焊接，磁化重编程，和结构重构。这些功能不仅提供了高度期望的结构和材料可编程性和可再编程性，而且还使得能够制造具有复杂几何形状和磁化分布的结构。有针对性的焊接被用于具有用于复杂致动的特定逻辑的基本建筑模块的模块化组装。磁化重编程使得能够改变所制造的结构的变形模式。磁致动下的形状重构与网络塑性耦合，以远程将二维镶嵌转换为复杂的三维结构，提供了一种制造功能软结构材料如三维kirigami的新策略。我们预计，报告的磁性动态聚合物提供了一个新的范例，为未来的多功能组件和可重构变形架构和设备的设计和制造。
英文摘要：
Shape morphing magnetic soft materials, composed of magnetic particles in a soft polymer matrix, can transform shapes reversibly, remotely, and rapidly, finding diverse applications in actuators, soft robotics, and biomedical devices. To achieve on-demand and sophisticated shape morphing, the manufacturing of structures with complex geometry and magnetization distribution is highly desired. Here, we report a magnetic dynamic polymer composite composed of hard-magnetic microparticles in a dynamic polymer network with thermal-responsive reversible linkages, which permit functionalities including targeted welding, magnetization reprogramming, and structural reconfiguration. These functions not only provide highly desirable structural and material programmability and reprogrammability but also enable the manufacturing of structures with complex geometry and magnetization distribution. The targeted welding is exploited for modular assembling of fundamental building modules with specific logics for complex actuation. The magnetization reprogramming enables altering the morphing mode of the manufactured structures. The shape reconfiguration under magnetic actuation is coupled with network plasticity to remotely transform two-dimensional tessellations into complex three-dimensional architectures, providing a new strategy of manufacturing functional soft architected materials such as three-dimensional kirigami. We anticipate that the reported magnetic dynamic polymer provides a new paradigm for the design and manufacturing of future multifunctional assemblies and reconfigurable morphing architectures and devices.
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