3D Printing of Liquid Crystal Elastomeric Actuators with Spatially Programed Nematic Order,Advanced Materials

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3D Printing of Liquid Crystal Elastomeric Actuators with Spatially Programed Nematic Order
Advanced Materials ( IF 27.4 ) Pub Date : 2018-01-15 , DOI: 10.1002/adma.201706164
Arda Kotikian ₁ , Ryan L. Truby ₁ , John William Boley ₁ , Timothy J. White ₂ , Jennifer A. Lewis ₁

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Liquid crystal elastomers (LCEs) are soft materials capable of large, reversible shape changes, which may find potential application as artificial muscles, soft robots, and dynamic functional architectures. Here, the design and additive manufacturing of LCE actuators (LCEAs) with spatially programed nematic order that exhibit large, reversible, and repeatable contraction with high specific work capacity are reported. First, a photopolymerizable, solvent‐free, main‐chain LCE ink is created via aza‐Michael addition with the appropriate viscoelastic properties for 3D printing. Next, high operating temperature direct ink writing of LCE inks is used to align their mesogen domains along the direction of the print path. To demonstrate the power of this additive manufacturing approach, shape‐morphing LCEA architectures are fabricated, which undergo reversible planar‐to‐3D and 3D‐to‐3D′ transformations on demand, that can lift significantly more weight than other LCEAs reported to date.

中文翻译：

具有空间编程向列顺序的液晶弹性致动器的3D打印

液晶弹性体（LCE）是能够进行大的可逆形状变化的软材料，可能会在人造肌肉，软机器人和动态功能体系结构中找到潜在的应用。在此，报告了具有空间编程向列顺序的LCE执行器（LCEA）的设计和增材制造，这些执行器具有大的，可逆的和可重复的收缩，并且具有较高的比功。首先，通过aza-Michael加成法生产具有光致聚合，无溶剂的主链LCE油墨，该油墨具有适合3D打印的粘弹性。接下来，LCE墨水的高工作温度直接墨水书写用于沿打印路径的方向排列其液晶元域。为了展示这种增材制造方法的强大功能，我们制造了形状变形的LCEA架构，

更新日期：2018-01-15

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