True Low‐Power Self‐Locking Soft Actuators,Advanced Materials

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True Low‐Power Self‐Locking Soft Actuators
Advanced Materials ( IF 27.4 ) Pub Date : 2018-02-09 , DOI: 10.1002/adma.201706547
Seung Jae Kim ₁ , Onnuri Kim ₁ , Moon Jeong Park ₁

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Natural double‐layered structures observed in living organisms are known to exhibit asymmetric volume changes with environmental triggers. Typical examples are natural roots of plants, which show unique self‐organized bending behavior in response to environmental stimuli. Herein, light‐ and electro‐active polymer (LEAP) based actuators with a double‐layered structure are reported. The LEAP actuators exhibit an improvement of 250% in displacement and hold an object three times heavier as compared to that in the case of conventional electro‐active polymer actuators. Most interestingly, the bending motion of the LEAP actuators can be effectively locked for a few tens of minutes even in the absence of a power supply. Further, the self‐locking LEAP actuators show a large and reversible bending strain of more than 2.0% and require only 6.2 mW h cm⁻² of energy to hold an object for 15 min at an operating voltage of 3 V. These novel self‐locking soft actuators should find wide applicability in artificial muscles, biomedical microdevices, and various innovative soft robot technologies.

中文翻译：

真正的低功耗自锁软促动器

已知在生物中观察到的天然双层结构会随着环境触发而显示出不对称的体积变化。典型的例子是植物的天然根，它们在响应环境刺激时表现出独特的自组织弯曲行为。在此，报道了具有双层结构的基于光和电活性聚合物（LEAP）的执行器。与传统的电活性聚合物执行器相比，LEAP执行器的位移提高了250％，并且可将物体重三倍。最有趣的是，即使没有电源，LEAP执行器的弯曲运动也可以有效地锁定几十分钟。此外，自锁式LEAP执行器显示出大于2.0％的大且可逆的弯曲应变，仅需6.2 mW h cm在3 V的工作电压下可将能量保持为⁻²的能量达15分钟。这些新颖的自锁式软致动器应在人造肌肉，生物医学微型设备和各种创新的软机器人技术中找到广泛的适用性。

更新日期：2018-02-09

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