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Plasma-Induced Polymerizations: A New Synthetic Entry in Liquid Crystal Elastomer Actuators.
Macromolecular Rapid Communications ( IF 4.6 ) Pub Date : 2020-08-18 , DOI: 10.1002/marc.202000385
Bin Ni 1 , Mengxue Zhang 1 , Cédric Guyon 1 , Patrick Keller 2 , Michael Tatoulian 1 , Min-Hui Li 1
Affiliation  

The research on soft actuators including liquid crystal elastomers (LCEs) becomes more and more appealing at a time when the expansion of artificial systems is blooming. Among the various LCE actuators, the bending deformation is often in the origin of many actuation modes. Here, a new strategy with plasma technology is developed to prepare single‐layer main‐chain LCEs with thermally actuated bending and contraction deformations. Two distinct reactions, plasma polymerization and plasma‐induced photopolymerization, are used to polymerize in one step the nematic monomer mixture aligned by magnetic field. The plasma polymerization forms cross‐linked but disoriented structures at the surface of the LCE film, while the plasma‐induced photopolymerization produces aligned LCE structure in the bulk. The actuation behaviors (bending and/or contraction) of LCE films can be adjusted by plasma power, reaction time, and sample thickness. Soft robots like crawling walker and flower mimic are built by LCE films with bending actuation.

中文翻译:

等离子体诱导的聚合:液晶弹性体致动器中的一种新的合成方法。

在人造系统的发展蓬勃发展之际,对包括液晶弹性体(LCE)在内的软促动器的研究变得越来越有吸引力。在各种LCE执行器中,弯曲变形通常是许多执行模式的起源。在此,开发了一种采用等离子体技术的新策略来制备具有热驱动弯曲和收缩变形的单层主链LCE。等离子体聚合和等离子体诱导的光聚合这两种截然不同的反应用于一步一步地聚合通过磁场排列的向列单体混合物。等离子体聚合在LCE膜的表面形成交联但不定向的结构,而等离子体诱导的光聚合在主体中产生对齐的LCE结构。LCE薄膜的驱动行为(弯曲和/或收缩)可以通过等离子功率,反应时间和样品厚度来调节。LCE薄膜通过弯曲的驱动器来构建诸如爬行的助步车和仿花机器人之类的软机器人。
更新日期:2020-10-05
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