Degree of Orientation in Liquid Crystalline Elastomers Defines the Magnitude and Rate of Actuation
Degree of Orientation in Liquid Crystalline Elastomers Defines the Magnitude and Rate of Actuation
复制标题
液晶弹性体的取向程度决定了驱动的大小和速率
DOI：
10.1021/acsmacrolett.2c00754
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发表时间：
2023-01-30
影响因子：
7.015
通讯作者：
White, Timothy J.
中科院分区：
文献类型：
--
作者：
Bauman, Grant E.;Hoang, Jonathan D.;White, Timothy J.
液晶弹性体（LCE）的各向异性源自分子成分的相互作用促进的取向。在这里，我们将一系列经过机械对准的 LCE 的热机械响应与赫尔曼斯取向参数的测量结果相关联。 LCE 是用不同浓度的液晶介晶系统制备的，这会影响可实现有序的相对程度。这些组合物经过不同程度的机械排列，以制备具有跨越各种取向参数的取向的LCE。 LCE 的刺激响应表明液晶含量定义了驱动温度，而 LCE 的取向参数与 LCE 的总驱动应变以及热机械响应速率密切相关。
The anisotropy of liquid crystalline elastomers (LCEs) is derived from the interaction-facilitated orientation of the molecular constituents. Here, we correlate the thermomechanical response of a series of LCEs subjected to mechanical alignment to measurements of the Hermans orientation parameter. The LCEs were systematically prepared with varying concentrations of liquid crystalline mesogens, which affects the relative degree of achievable order. These compositions were subject to varying degrees of mechanical alignment to prepare LCEs with orientations that span a wide range of orientation parameters. The stimuli-response of the LCEs indicates that the liquid crystalline content defines the temperature of actuation, whereas the orientation parameter of the LCE is intricately correlated to both the total actuation strain of the LCE as well as the rate of thermomechanical response.