Preparation of Soft Microactuators in a Continuous Flow Synthesis Using a Liquid-Crystalline Polymer Crosslinker
Preparation of Soft Microactuators in a Continuous Flow Synthesis Using a Liquid-Crystalline Polymer Crosslinker
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DOI：
10.1002/macp.201200276
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发表时间：
2012-09-26
影响因子：
2.5
通讯作者：
Zentel, Rudolf
中科院分区：
文献类型：
--
作者：
Fleischmann, Eva-Kristina;Ohm, Christian;Zentel, Rudolf
我们提出了一种高分子液晶（LC）交联剂的合成及其在软微致动器的制备中的用途。由温敏液晶弹性体（LCE）组成的微致动器在连续的飞行过程中在微流体装置中制造。LC聚合物交联剂可与LC单体混溶并提供快速聚合和交联。最重要的是，它促进了移动的单体相的各向异性中间相，这是常规的非介晶交联剂所不能提供的。这允许在微流体装置内进行等温处理。通过明智地优化LCE颗粒的交联密度，可以实现高达65%的温度驱动的形状变化。
We present the synthesis of a polymeric liquid crystalline (LC) crosslinker and its usage in the preparation of soft microactuators. The microactuators, composed of thermoresponsive liquid crystalline elastomers (LCE), are fabricated in a microfluidic device in a continuous on the fly process. The LC polymer crosslinker is miscible with the LC monomer and provides for a rapid polymerization and crosslinking. Most importantly, it promotes an enantiotropic mesophase of the mobile monomer phase, which is not provided by conventional nonmesogenic crosslinkers. This allows an isothermal handling inside the microfluidic setup. Temperature-driven shape changes up to 65% could be achieved by judiciously optimizing the crosslinking density of the LCE particles.