Photothermally and magnetically controlled reconfiguration of polymer composites for soft robotics
Photothermally and magnetically controlled reconfiguration of polymer composites for soft robotics
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DOI：
10.1126/sciadv.aaw2897
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发表时间：
2019-08-01
期刊：
影响因子：
13.6
通讯作者：
Tracy, Joseph B.
中科院分区：
文献类型：
--
作者：
Liu, Jessica A. -C.;Gillen, Jonathan H.;Tracy, Joseph B.
新材料正在推动软机器人领域的发展。磁性铁微粒分散在形状记忆聚合物基体的复合膜被证明可重构，远程驱动的软机器人。复合薄膜同时响应磁场和光。通过组合磁致动和光热加热获得的临时形状可以通过关闭光和磁场来锁定。随后在没有磁场的情况下照射驱动永久形状的恢复。在杠杆和花中，展示了锁定和解锁的多个循环。卷轴显示，电影的永久形状可以编程，它们可以冻结在中间配置。通过控制永久形状，双稳态按扣可以被磁致动和光学致动，以及偏置。抓取器可以反复拾取和释放物体。对光热加热和磁驱动相结合的模拟研究对指导新器件的设计具有重要意义。
New materials are advancing the field of soft robotics. Composite films of magnetic iron microparticles dispersed in a shape memory polymer matrix are demonstrated for reconfigurable, remotely actuated soft robots. The composite films simultaneously respond to magnetic fields and light. Temporary shapes obtained through combined magnetic actuation and photothermal heating can be locked by switching off the light and magnetic field. Subsequent illumination in the absence of the magnetic field drives recovery of the permanent shape. In cantilevers and flowers, multiple cycles of locking and unlocking are demonstrated. Scrolls show that the permanent shape of the film can be programmed, and they can be frozen in intermediate configurations. Bistable snappers can be magnetically and optically actuated, as well as biased, by controlling the permanent shape. Grabbers can pick up and release objects repeatedly. Simulations of combined photothermal heating and magnetic actuation are useful for guiding the design of new devices.