Liquid Crystal Elastomer‐Based Magnetic Composite Films for Reconfigurable Shape‐Morphing Soft Miniature Machines,Advanced Materials

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Liquid Crystal Elastomer‐Based Magnetic Composite Films for Reconfigurable Shape‐Morphing Soft Miniature Machines
Advanced Materials ( IF 27.4 ) Pub Date : 2021-01-14 , DOI: 10.1002/adma.202006191
Jiachen Zhang ₁ , Yubing Guo ₁ , Wenqi Hu ₁ , Ren Hao Soon ₁ , Zoey S Davidson ₁ , Metin Sitti _{1,

2}

Affiliation

Stimuli‐responsive and active materials promise radical advances for many applications. In particular, soft magnetic materials offer precise, fast, and wireless actuation together with versatile functionality, while liquid crystal elastomers (LCEs) are capable of large reversible and programmable shape‐morphing with high work densities in response to various environmental stimuli, e.g., temperature, light, and chemical solutions. Integrating the orthogonal stimuli‐responsiveness of these two kinds of active materials could potentially enable new functionalities and future applications. Here, magnetic microparticles (MMPs) are embedded into an LCE film to take the respective advantages of both materials without compromising their independent stimuli‐responsiveness. This composite material enables reconfigurable magnetic soft miniature machines that can self‐adapt to a changing environment. In particular, a miniature soft robot that can autonomously alter its locomotion mode when it moves from air to hot liquid, a vine‐like filament that can sense and twine around a support, and a light‐switchable magnetic spring are demonstrated. The integration of LCEs and MMPs into monolithic structures introduces a new dimension in the design of soft machines and thus greatly enhances their use in applications in complex environments, especially for miniature soft robots, which are self‐adaptable to environmental changes while being remotely controllable.

中文翻译：

用于可重构形状变形软微型机器的液晶弹性体磁性复合薄膜

刺激响应和活性材料有望为许多应用带来根本性的进步。特别是，软磁材料提供精确、快速和无线驱动以及多功能性，而液晶弹性体（LCE）能够以高工作密度进行大可逆和可编程形状变形，以响应各种环境刺激，例如温度、光和化学溶液。整合这两种活性材料的正交刺激响应性可能会带来新的功能和未来的应用。在这里，磁性微粒（MMP）被嵌入到 LCE 薄膜中，以利用两种材料各自的优点，而不损害它们独立的刺激响应性。这种复合材料使得可重构的磁性软微型机器能够自我适应不断变化的环境。特别是，展示了一种微型软机器人，当它从空气移动到热液体时，可以自主改变其运动模式，可以感知并缠绕在支撑物上的藤状细丝，以及光控磁性弹簧。将LCE和MMP集成到整体结构中，为软机器的设计引入了新的维度，从而大大增强了它们在复杂环境中的应用，特别是对于微型软机器人，它们能够自适应环境变化，同时可远程控制。

更新日期：2021-02-22

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