Asymmetric elastoplasticity of stacked graphene assembly actualizes programmable untethered soft robotics
Asymmetric elastoplasticity of stacked graphene assembly actualizes programmable untethered soft robotics
复制标题
堆叠石墨烯组件的不对称弹塑性实现了可编程无束缚软机器人
DOI：
10.1038/s41467-020-18214-0
复制
发表时间：
2020-08-31
影响因子：
16.6
通讯作者：
Chen, Tao
中科院分区：
文献类型：
--
作者：
Wang, Shuai;Gao, Yang;Chen, Tao
人们对开发可编程无绳软机器人的兴趣与日俱增，但也面临着巨大的挑战。在这里，我们通过应用堆叠石墨烯组件(SGA)在拉伸和压缩下的非对称弹塑性来解决这一挑战。我们将SGA转移到聚乙烯(PE)薄膜上，得到的SGA/PE双层膜随着环境温度的变化表现出快速的变形行为。随着图案化SGA和/或局部回火前处理的应用，这种热诱导变形系统的初始配置也可以根据需要进行编程，从而产生具有复杂三维结构的不同驱动系统。更重要的是，与普通双层驱动器不同，我们的SGA/PE双层薄膜在经过约束回火过程后，会自发卷曲成卷，可以在红外线照明下实现滚动运动，从而产生无拴系的光驱电机。SGA的非对称性弹塑性赋予了基于SGA的双材料在开发具有高度构型可编程性的无绳系软机器人方面的巨大应用前景。开发可编程的无绳系软机器人仍然是一个挑战。在这里，作者应用堆叠石墨烯组件的非对称弹塑性来解决这一挑战，并实现了高配置可编程性的无绳热响应变形。
There is ever-increasing interest yet grand challenge in developing programmable untethered soft robotics. Here we address this challenge by applying the asymmetric elastoplasticity of stacked graphene assembly (SGA) under tension and compression. We transfer the SGA onto a polyethylene (PE) film, the resulting SGA/PE bilayer exhibits swift morphing behavior in response to the variation of the surrounding temperature. With the applications of patterned SGA and/or localized tempering pretreatment, the initial configurations of such thermal-induced morphing systems can also be programmed as needed, resulting in diverse actuation systems with sophisticated three-dimensional structures. More importantly, unlike the normal bilayer actuators, our SGA/PE bilayer, after a constrained tempering process, will spontaneously curl into a roll, which can achieve rolling locomotion under infrared lighting, yielding an untethered light-driven motor. The asymmetric elastoplasticity of SGA endows the SGA-based bi-materials with great application promise in developing untethered soft robotics with high configurational programmability. Developing programmable untethered soft robotics remains a challenge. Here the authors apply the asymmetric elastoplasticity of stacked graphene assembly to address this challenge and realize untethered thermoresponsive morphing in tandem with high configurational programmability.