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Material assembly from collective action of shape-changing polymers

Nat Mater. 2024-01; 
Mustafa K Abdelrahman, Robert J Wagner, Manivannan Sivaperuman Kalairaj, Mason Zadan, Min Hee Kim, Lindy K Jang, Suitu Wang, Mahjabeen Javed, Asaf Dana, Kanwar Abhay Singh, Sarah E Hargett, Akhilesh K Gaharwar, Carmel Majidi, Franck J Vernerey, Taylor H Ware
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摘要

Some animals form transient, responsive and solid-like ensembles through dynamic structural interactions. These ensembles demonstrate emergent responses such as spontaneous self-assembly, which are difficult to achieve in synthetic soft matter. Here we use shape-morphing units comprising responsive polymers to create solids that self-assemble, modulate their volume and disassemble on demand. The ensemble is composed of a responsive hydrogel, liquid crystal elastomer or semicrystalline polymer ribbons that reversibly bend or twist. The dispersions of these ribbons mechanically interlock, inducing reversible aggregation. The aggregated liquid crystal elastomer ribbons have a 12-fold increase in the yield stress c... More

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