3D Printing of Liquid Crystal Elastomeric Actuators with Spatially Programed Nematic Order
3D Printing of Liquid Crystal Elastomeric Actuators with Spatially Programed Nematic Order
复制标题
DOI：
10.1002/adma.201706164
复制
发表时间：
2018-03-08
影响因子：
29.4
通讯作者：
Lewis, Jennifer A.
中科院分区：
文献类型：
--
作者：
Kotikian, Arda;Truby, Ryan L.;Lewis, Jennifer A.
液晶弹性体（LCE）是能够大的、可逆的形状变化的软材料，其可能在人工肌肉、软机器人和动态功能架构中找到潜在的应用。在这里，LCE致动器（LCEAs）的设计和增材制造与空间编程的有序，表现出大的，可逆的，可重复的收缩与高比功容量的报告。首先，通过aza-Michael加成产生具有3D打印适当粘弹性的光聚合、无溶剂主链LCE油墨。接下来，使用LCE油墨的高操作温度直接油墨写入来使它们的液晶基元域沿着印刷路径的方向对齐。为了证明这种增材制造方法的能力，制造形状变形的LCEA架构，其根据需要经历可逆的平面到3D和3D到3D'的转变，其可以比迄今报道的其他LCEA提升显著更多的重量。
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 todate.