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Localizing genesis in polydomain liquid crystal elastomers.
Soft Matter ( IF 3.4 ) Pub Date : 2020-01-02 , DOI: 10.1039/c9sm01923e
Hayden E Fowler 1 , Brian R Donovan , Joselle M McCracken , Francisco López Jiménez , Timothy J White
Affiliation  

Programming the local orientation of liquid crystal elastomers (LCEs) is a differentiated approach to prepare monolithic material compositions with localized deformation. Our prior efforts prepared LCEs with surface-enforced spatial variations in orientation to localize deformation when the LCEs were subjected to directional load. However, because these surface alignment methods included regions of planar orientation, the deformation of these programmed LCEs is inherently directional. The absence of macroscopic orientation in polydomain LCEs results in uniform, nonlinear deformation in all axes (omnidirectional soft elasticity). Here, we exploit the distinct mechanical response of polydomain LCEs prepared with isotropic or nematic genesis. By localizing the polydomain genesis via masked photopolymerizations conducted at different temperatures, we detail the preparation of main-chain, polydomain LCEs that are homogeneous in composition but exhibit spatially localized programmability in their mechanical response that is uniform in all directions.

中文翻译:

在多畴液晶弹性体中本地化起源。

对液晶弹性体(LCE)的局部取向进行编程是一种制备具有局部变形的整体材料组合物的独特方法。我们先前的工作准备了具有表面增强的方向空间变化的LCE,以在LCE受到方向性载荷时局部变形。然而,由于这些表面对准方法包括平面取向的区域,所以这些编程的LCE的变形本质上是定向的。多域LCE中缺少宏观取向会导致所有轴上均匀,非线性的变形(全方向软弹性)。在这里,我们利用各向同性或向列生成的多域LCEs的独特的机械响应。通过在不同温度下进行的掩盖光聚合作用来定位多域生成,
更新日期:2020-01-02
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