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Microfluidic Preparation of Liquid Crystalline Elastomer Actuators

Microfluidic Preparation of Liquid Crystalline Elastomer Actuators

Published on: May 20, 2018

来自液晶弹性体的无异型环状微肌.

Jean E Marshall¹, Sarah Gallagher, Eugene M Terentjev

¹Department of Materials Science and Metallurgy, University of Cambridge , 27 Charles Babbage Road, Cambridge, CB3 0FS, United Kingdom.

Journal of the American Chemical Society

|December 4, 2013

概括

研究人员开发了一种新方法,用液晶弹性体 (LCE) 来制造微观的人工肌肉. 这种技术简化了制造,改善了对齐,并降低了先进软机器人应用的操作温度.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
软机器人软机器人软机器人软机器人

背景情况:

单主体液晶弹性体 (LCEs) 提供类似肌肉的驱动 (20-500%应变,10-100kPa应力) 具有高耐疲劳性.
目前的LCE制造是复杂的,涉及复杂的组件合成,多步骤的交叉连接对齐,和高过渡温度,限制实际应用.
现有的对齐方法,比如在交叉连接时的机械拉伸,很难控制,主要适用于毫米尺度的样品.

研究的目的:

开发一种简化,可扩展的方法来合成对齐的单域LCE微执行器.
通过最小化交叉连接步骤和改进对齐控制,减少LCE制造的复杂性.
为了更广泛的应用,降低LCE的操作温度.

主要方法:

在聚合物矩阵中嵌入LCE前体滴,并在高温下单轴拉伸.
利用聚合物矩阵限制在单个交叉连接步骤中保持对齐.
在聚合过程中加入一个共纳体,以降低阴性-同位素过渡温度.

主要成果:

在微观LCE对象中使用简化的单个交叉链接步骤实现了一致的单域对齐.
成功降低了阴性-同位素过渡温度至58°C,使得在较低的温度下运行.

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在制造的微型执行器中证明了可逆的热切换和大张变化 (20-500%).

结论:

开发的方法允许并行制造许多微尺度的LCE执行器,具有可控对齐.
这种方法克服了LCE合成的关键局限性,使微型执行器更容易用于各种应用.
这种技术可以进一步扩展,为制造先进的软机器人组件铺平了道路.