Smart materials with simply reversible deformation or reconfigurability have shown great potential in artificial muscles, robots, controlled displays, etc. However, the combination of reversible and reconfigured functions in responsive materials, which can endow them with mature and complex actuation performance similar to that of living things, is still a great challenge. In this regard, we report an intelligent graphene oxide (GO)/polyvinylidene fluoride (PVDF) film with reconfigured structures resulting from inner plastic deformation after treatment at elevated temperature (40–80 °C), which simultaneously expresses basically and secondarily reversible deformation ability of its original and reconfigured states in response to external stimuli (e.g. IR light and moisture), respectively. As a result, this film achieves unique multi-level actuation behaviour by combining reversible and reconfigured functions. Based on this, an “Artificial Pupil” with two switchable light penetration modes under the different reconfigured states was designed and developed. Furthermore, many special and reconfigured 3D structures (e.g. cubic boxes, pyramids) have been well explored, which is promising for applications in future materials engineering and biomimetic devices.

中文翻译：

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具有多级变形特性的智能薄膜执行器。

具有简单可逆变形或可重构性的智能材料已在人造肌肉，机器人，受控显示器等方面显示出巨大潜力。然而，响应性材料中可逆和可重构功能的结合，可以赋予它们类似于成熟的，复杂的驱动性能。生物，仍然是巨大的挑战。在这方面，我们报告了一种智能的氧化石墨烯（GO）/聚偏二氟乙烯（PVDF）膜，该膜具有由于在高温（40–80°C）下处理后内部塑性变形而导致的重新配置的结构，该膜同时具有基本和次要的可逆变形能力响应外部刺激（例如，红外光和湿气）。结果，该膜通过组合可逆和重新配置的功能实现了独特的多级驱动行为。在此基础上，设计并开发了一种在不同的重构状态下具有两种可切换光穿透模式的“人工瞳孔”。此外，已经对许多特殊的和重新配置的3D结构（例如立方箱，金字塔）进行了深入研究，这有望在未来的材料工程和仿生设备中得到应用。