液晶弹性体-液态金属复合材料：感应加热超快、无束缚和可编程驱动
Liquid Crystal Elastomer-Liquid Metal Composite: Ultrafast, Untethered, and Programmable Actuation by Induction Heating
摘要：
液晶弹性体（LCE）是一种刺激响应材料，由于其具有大的、可编程的和完全可逆的应变的能力，其已经被广泛研究用于包括人工肌肉、形状变形结构和软机器人在内的应用。为了充分利用LCE的优势，非常需要快速、无约束和可编程的致动方法。在这里，我们报告了一种液晶半导体-液态金属（LCE-LM）复合材料，它可以通过涡流感应加热实现超快驱动和高加热可编程性。该复合材料由LM通过直接墨水书写（DIW）夹在两个3D打印LCE层之间组成。当受到高频交变磁场的作用时，这种复合材料可以在毫秒内被激活。通过移动磁场，可以在空间上控制涡电流以用于选择性致动。此外，通过对样品中的LM厚度分布进行编程，可以实现顺序加热。有了这些能力，LCE-LM复合材料被进一步开发用于弹出结构的多模态变形、地面全向机器人运动、水中目标物体操纵和爬行。
英文摘要：
Liquid crystal elastomers (LCEs) are a stimuli-responsive material which has been intensively studied for applications including artificial muscles, shape morphing structures, and soft robotics, due to its capability of large, programmable, and fully reversible strains. To fully take advantage of LCEs, rapid, untethered, and programmable actuation methods are highly desirable. Here, we report a liquid crystal elastomer-liquid metal (LCE-LM) composite, which enables ultrafast actuations and high heating programmability by eddy current induction heating. The composite consists of LM sandwiched between two 3D-printed LCE layers via direct ink writing (DIW). When subject to a high-frequency alternating magnetic field, the composite can be actuated in milli-seconds. By moving the magnetic field, the eddy current can be spatially controlled for selective actuation. Additionally, sequential heating is achievable by programming the LM thickness distribution in a specimen. With these capabilities, the LCE-LM composite is further exploited for multimodal deformation of a pop-up structure, on ground omnidirectional robotic motion, in water targeted object manipulation, and crawling.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
