3D Printable and Reconfigurable Liquid Crystal Elastomers with Light-Induced Shape Memory via Dynamic Bond Exchange
3D Printable and Reconfigurable Liquid Crystal Elastomers with Light-Induced Shape Memory via Dynamic Bond Exchange
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DOI：
10.1002/adma.201905682
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发表时间：
2019-10-30
影响因子：
29.4
通讯作者：
Lewis, Jennifer A.
中科院分区：
文献类型：
--
作者：
Davidson, Emily C.;Kotikian, Arda;Lewis, Jennifer A.
3D可打印和可重构的液晶弹性体（LCE）在高于和低于其向列向同性至各向同性转变温度（T-NI）时可逆地变形，其致动形状可以通过高温UV曝光锁定。通过合成具有可光致变色的动态键的基于LCE的油墨，可以利用印刷来本地编程其指向矢对准，并且可以使用UV光来实现受控的网络重新配置，而不需要施加机械场。使用这种集成的方法，3D LCE被构建在表现出复杂形状变化的单片和异质布局中，并且其变换的形状可以根据需要被锁定。
3D printable and reconfigurable liquid crystal elastomers (LCEs) that reversibly shape-morph when cycled above and below their nematic-to-isotropic transition temperature (T-NI) are created, whose actuated shape can be locked-in via high-temperature UV exposure. By synthesizing LCE-based inks with light-triggerable dynamic bonds, printing can be harnessed to locally program their director alignment and UV light can be used to enable controlled network reconfiguration without requiring an imposed mechanical field. Using this integrated approach, 3D LCEs are constructed in both monolithic and heterogenous layouts that exhibit complex shape changes, and whose transformed shapes could be locked-in on demand.