用温敏材料实现仿生捕蝇草自动开合，温度变化触发动作。
Thermo-responsive closing and reopening artificial Venus Flytrap utilizing shape memory elastomers
- 采用热响应型形状记忆弹性体，实现自驱动开合。
- 38°C闭合，45°C开启，温控范围自然可控。
- 首个可自主双向运动的仿生软机器人装置。
尽管常被认为静态缓慢，某些植物的运动速度却快于眨眼。捕蝇草（Dionaea muscipula）的快速闭合机制长期吸引研究者与工程师关注，成为仿生软机器人的重要灵感来源。已有多种人工捕蝇草（AVF）系统实现了闭合功能，但尚未实现自主开闭循环。本研究提出一种全尺寸热响应型人工捕蝇草，利用新型热敏紫外固化形状记忆材料构建软机器人系统。其双曲面捕食瓣由形状记忆聚合物制成，在38°C时闭合，45°C时启动重新打开，通过形状记忆弹性体条作为拮抗执行器实现瓣片回弹。该工作首次实现基于升温序列的自主闭合与开启，标志着向自主双向运动软机器人迈进的关键一步。
原文摘要 · Abstract (English)
Despite their often perceived static and slow nature, some plants can move faster than the blink of an eye. The rapid snap closure motion of the Venus flytrap (Dionaea muscipula) has long captivated the interest of researchers and engineers alike, serving as a model for plant-inspired soft machines and robots. The translation of the fast snapping closure has inspired the development of various artificial Venus flytrap (AVF) systems. However, translating both the closing and reopening motion of D. muscipula into an autonomous plant inspired soft machine has yet to be achieved. In this study, we present an AVF that autonomously closes and reopens, utilizing novel thermo-responsive UV-curable shape memory materials for soft robotic systems. The life-sized thermo-responsive AVF exhibits closing and reopening motions triggered in a naturally occurring temperature range. The doubly curved trap lobes, built from shape memory polymers, close at 38°C, while reopening initiates around 45°C, employing shape memory elastomer strips as antagonistic actuators to facilitate lobe reopening. This work represents the first demonstration of thermo-responsive closing and reopening in an AVF with programmed sequential motion in response to increasing temperature. This approach marks the next step toward autonomously bidirectional moving soft machines/robots.
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