Light‐Driven Shape‐Memory Porous Films with Precisely Controlled Dimensions |
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| Authors: | Wei Wang Dingfeng Shen Xiao Li Dr Yuan Yao Prof Jiaping Lin Aurelia Wang Jiwoo Yu Prof Zhong Lin Wang Prof Suck Won Hong Prof Zhiqun Lin Prof Shaoliang Lin |
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| Institution: | 1. Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China;2. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, USA;3. Department of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, Pusan National University, Busan, Republic of Korea |
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| Abstract: | Shape‐memory polymers (SMPs) are an intriguing class of smart materials possessing reversible shape change and recovery capabilities. Effective routes to shape‐memory porous films (SMPFs) are few and limited in scope owing to the difficulty in manipulating the shape change of pores by conventional methods. Herein we report an unconventional strategy for crafting light‐driven SMPFs by judiciously constructing highly ordered porous films via a facile “breath figure” approach, followed by sequential vapor crosslinking and nondestructive directional light manipulation. Micropores can thus be transformed into other shapes including rectangle, rhombus and size‐reduced micropores at room temperature. The transformed micropores can be reverted to their original shapes by either thermal annealing or UV irradiation. As such, this strategy expands the rich diversity of SMPs accessible. |
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| Keywords: | azobenzene block copolymers light manipulation shape memory thin films |
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