Integrating breathing metal-organic frameworks (MOFs) particles into a passive polymer matrix is a successful strategy to develop self-folding composite films. However, the folding direction of the film depends on the gradient distribution of breathing MOFs particles in the polymer matrix, which is a huge challenge. Herein, acoustic manipulation is exploited to pattern breathing MIL-53(Fe) particles in liquid photosensitive resin to control over their spatial distribution, and combined with stereolithography to prepare self-folding composite films in situ. The prepared polymer film containing the microstructure of MIL-53(Fe) particles exhibits self-folding in response to the solvent that causes breathing of MIL-53(Fe) crystals. The reported strategy provides a simple, fast and environmentally friendly platform to prepare self-folding composite films based on breathing MOFs.

将呼吸金属有机骨架（MOF）颗粒整合到被动聚合物基质中是开发自折叠复合膜的成功策略。但是，薄膜的折叠方向取决于呼吸MOF颗粒在聚合物基质中的梯度分布，这是一个巨大的挑战。在本文中，利用声学操纵来使液态光敏树脂中的MIL-53（Fe）颗粒呼吸模式化，以控制其空间分布，并与立体光刻技术结合以原位制备自折叠复合膜。所制备的包含MIL-53（Fe）微粒的微结构的聚合物薄膜对溶剂的反应会自折叠，而溶剂会引起MIL-53（Fe）晶体的呼吸。报告的策略提供了一个简单，快速且环保的平台，可以基于呼吸MOF制备自折叠复合膜。