A Class of Rigid–Flexible Coupling Crystalline Crosslinked Polymers as Vapomechanical Actuators. Issue 12 (2nd February 2022)

• Record Type: Journal Article
• Authors: Lin, En; Wang, Zhifang; Zhao, Xiuyu; Liu, Zhaoyi; Yan, Dong; Jin, Fazheng; Chen, Yao; Cheng, Peng; Zhang, Zhenjie
• Is Part Of: Angewandte Chemie international edition. Volume 61:Issue 12(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-02-02
• Subjects: Covalent Organic Frameworks -- Crosslinked Polymer -- Crystalline -- Smart Materials -- Vapor Responsive; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202117390
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Fabricating mechanically responsive actuators that can efficiently convert external stimuli into mechanical work is of great significance for real‐world applications. Herein, we rationally design a class of rigid–flexible coupling crystalline crosslinked polymers (CCPs) to fabricate vapomechanically responsive actuators. Interfacial condensation reactions of flexible macromers with rigid monomers afford a series of freestanding CCP membranes. Notably, it is the first example where crosslinked polymers show high crystallinity and porosity. Moreover, the CCP membranes exhibit good mechanical properties and interesting vapor‐triggered actuation performance, which is reversible and repeatable. We find that the unusual polymer structures, high vapor sorption, and anisotropic membranes contribute to the directional deformation performance of the CCP actuators. The synthesis approach in this work provides new insights into the design and fabrication of smart materials for advanced applications. Abstract : A new class of rigid–flexible coupling crystalline crosslinked polymers is fabricated for the first time. The polymers can form self‐standing membranes showing outstanding vapomechanically responsive performance.