Programmable micropatterned surface for single-layer homogeneous-polymer Janus actuator
Programmable micropatterned surface for single-layer homogeneous-polymer Janus actuator
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用于单层均质聚合物 Janus 执行器的可编程微图案表面
DOI：
10.1016/j.cej.2021.133052
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发表时间：
2021-10
影响因子：
15.1
通讯作者：
Changyu Shen
中科院分区：
文献类型：
--
作者：
Panlong Wang;Guoqiang Zheng;Kun Dai;Chuntai Liu;Changyu Shen
聚合物致动器可以在环境刺激下产生编程变形（例如，热、光、电、化学气相）在软机器人、传感器、仿生器件、人工肌肉等新兴领域具有巨大的应用潜力，引起了越来越多的关注。尽管一些报道的单层聚合物致动器没有这种令人恼火的界面失效，但这种致动器的简易制造仍然是一个巨大的挑战。本文提出了一种基于热塑性塑料的单层高分子Janus致动器（SHJA）的制备方法。利用真空辅助热压成型技术，在均匀的聚偏氟乙烯（PVDF）薄膜表面引入微脊阵列，使微图案化表面在丙酮蒸气中发生非对称溶胀和可控方向的弯曲。这种SHJA表现出优异的致动行为和耐久性。有趣的是，可以实现包括缠绕和跳跃在内的柔性仿生运动，这突出了其在软体机器人、传感器、仿生器件和人工肌肉中的应用前景。此外，考虑到简单的制备过程，低成本和可回收的基底材料，这种方法可以很容易地放大用于工业生产。
Polymer actuators that can produce programmed deformations upon environmental stimulation (e.g., heat, light, electricity and chemical vapor) have attracted more attention due to their great potential in some emerging fields of soft robots, sensors, biomimetic devices, artificial muscles, etc. Unfortunately, interfacial failure is frequently happened in bilayer or multilayer actuators due to the poor compatibility between their heterogeneous components. Although some reported single-layer polymer actuators are free of such irritating interfacial failure, facile fabrication of such actuators remains a huge challenge. Herein, a facile but cost-effective strategy to fabricate single-layer homogeneous-polymer Janus actuator (SHJA) based on thermoplastic was proposed. With the help of vacuum-assisted hot-press molding, micro-ridge arrays were introduced onto homogeneous polyvinylidene fluoride (PVDF) film surface, enabling such micropatterned surface to swell asymmetrically and bend in controllable direction in acetone vapor. Such SHJA exhibits excellent actuation behaviors and durability. Interestingly, diversely biomimetic motions including wrapping and jumping can be realized, which highlights its promising potential for applications in soft robots, sensors, biomimetic devices and artificial muscles. Moreover, considering the facile preparation process, low-cost and recyclable substrate material, this approach can be easily scaled up for industrial production.
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