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.

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gradient distribution of breathing mofs particles acoustic manipulation selffolding composite films spatial distribution passive polymer matrix photosensitive resin solvent folding direction

Chaoping Xu, Tengfei Zheng, Chaohui Wang, Ye Ai,.Acoustic manipulation of breathing MOFs particles for self-folding composite films preparation. 315 (),112288.

Chaoping Xu, et al."Acoustic manipulation of breathing MOFs particles for self-folding composite films preparation" 315

Chaoping Xu, Tengfei Zheng, Chaohui Wang, Ye Ai,"Acoustic manipulation of breathing MOFs particles for self-folding composite films preparation"