Department of Chemical and Biological Engineering, University of Colorado Boulder, 596 UCB, Boulder, Colorado 80309, United States.
Materials Science and Engineering Program, University of Colorado Boulder, 613 UCB, Boulder, Colorado 80303, United States.
ACS Macro Lett. 2023 Feb 21;12(2):248-254. doi: 10.1021/acsmacrolett.2c00754. Epub 2023 Jan 30.
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.
各向异性的液晶弹性体（LCEs）源于分子成分的相互作用促进的取向。在这里，我们将一系列 LCE 受机械排列影响的热机械响应与 Hermans 取向参数的测量相关联。LCEs 是通过系统地制备具有不同浓度的液晶介晶来制备的，这会影响实现有序的相对程度。这些组成物受到不同程度的机械排列，以制备具有广泛取向参数范围的 LCE 取向。LCE 的刺激-响应表明，液晶含量决定了致动的温度，而 LCE 的取向参数与 LCE 的总致动应变以及热机械响应的速率密切相关。
