Photo‐triggered shape morphing structures can be found in myriads of areas. Utilizing light as a switch can effectively control and regulate the precise deformation of structures. However, the integration of photo‐switching functions in shape‐morphing structures with complex geometries remains a challenge. Here, photoswitchable digital light processing based 4D printing high‐resolution and highly complex geometries, based on UV curable WO2.9 nanoparticle doped shape memory polymer nanocomposites is reported, which are highly deformable (stretchability up to ≈1000% at rubbery state) and fatigue resistant (repeatedly loaded >1200 times at ambient temperature). The presence of just trace WO2.9 nanoparticles (<0.20 wt.‰) contributes to the controlled photothermal property of nanocomposite via selective absorption of light, which enables reversibly photoswitchable (>50 times), spatial and remote control of 4D printing shape morphing structures. These findings offer a promising approach to expanding the applications of photo‐triggered shape‐morphing structures.

中文翻译：

---

光可切换 4D 打印远程控制响应和模拟变形形状记忆聚合物纳米复合材料

光触发的形状变形结构可以在无数的区域中找到。利用光作为开关可以有效控制和调节结构的精确变形。然而，将光开关功能集成到具有复杂几何形状的变形结构中仍然是一个挑战。这里，基于 4D 打印的光切换数字光处理高分辨率和高度复杂的几何形状，基于 UV 固化 WO2.9据报道，纳米粒子掺杂的形状记忆聚合物纳米复合材料具有高度可变形性（在橡胶状态下拉伸性高达约 1000%）和抗疲劳性（在环境温度下重复加载 >1200 次）。仅有微量WO的存在2.9纳米颗粒（<0.20 wt.‰）通过选择性吸收光来控制纳米复合材料的光热性能，从而实现 4D 打印形状变形结构的可逆光切换（>50 次）、空间和远程控制。这些发现为扩大光触发形状变形结构的应用提供了一种有前景的方法。