Reprogrammable, magnetically controlled polymeric nanocomposite actuators†,Materials Horizons

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Reprogrammable, magnetically controlled polymeric nanocomposite actuators†
Materials Horizons ( IF 12.2 ) Pub Date : 2018-06-21 00:00:00 , DOI: 10.1039/c8mh00266e
Li Wang _{1,

2,

3,

4,

5} , Muhammad Yasar Razzaq _{1,

2,

3,

4} , Tobias Rudolph _{1,

2,

3,

4} , Matthias Heuchel _{1,

2,

3,

4} , Ulrich Nöchel _{1,

2,

3,

4} , Ulrich Mansfeld _{1,

2,

3,

4} , Yi Jiang _{1,

2,

3,

4,

5} , Oliver E. C. Gould _{1,

2,

3,

4} , Marc Behl _{1,

2,

3,

4} , Karl Kratz _{1,

2,

3,

4} , Andreas Lendlein _{1,

2,

3,

4,

5}

Affiliation

Soft robots and devices with the advanced capability to perform adaptive motions similar to that of human beings often have stimuli-sensitive polymeric materials as the key actuating component. The external signals triggering the smart polymers’ actuations can be transmitted either via a direct physical connection between actuator and controlling unit (tethered) or remotely without a connecting wire. However, the vast majority of such polymeric actuator materials are limited to one specific type of motion as their geometrical information is chemically fixed. Here, we present magnetically driven nanocomposite actuators, which can be reversibly reprogrammed to different actuation geometries by a solely physical procedure. Our approach is based on nanocomposite materials comprising spatially segregated crystallizable actuation and geometry determining units. Upon exposure to a specific magnetic field strength the actuators’ geometric memory is erased by the melting of the geometry determining units allowing the implementation of a new actuator shape. The actuation performance of the nanocomposites can be tuned and the technical significance was demonstrated in a multi-cyclic experiment with several hundreds of repetitive free-standing shape shifts without losing performance.

中文翻译：

可重新编程的磁控聚合物纳米复合材料执行器†

具有执行类似于人类的自适应运动的先进能力的软机器人和设备通常具有对刺激敏感的聚合材料作为关键的驱动组件。触发智能聚合物致动的外部信号可以被发送通过执行器和控制单元之间的直接物理连接（系留），或者在没有连接线的情况下进行远程直接连接。但是，由于这种聚合物致动器材料的几何信息是化学固定的，因此绝大多数都限于一种特定类型的运动。在这里，我们介绍了磁性驱动的纳米复合材料致动器，可以通过一个物理过程将其可逆地重新编程为不同的致动几何形状。我们的方法基于纳米复合材料，包括空间上可分离的可结晶驱动和几何形状确定单元。当暴露于特定的磁场强度时，致动器的几何存储器通过熔化几何形状确定单元而被擦除，从而允许实现新的致动器形状。

更新日期：2018-06-21

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