Near-infrared light-driven liquid crystalline elastomers with simultaneously enhanced actuation strain and stress
Source abstract
Abstract
液晶弹性体(LCEs)在先进软执行器和机器人的应用中引起了广 泛关注. 具有高驱动应力和驱动应变的新兴LCEs始终是实际应用的理 想选择. 然而, 一个常识是, LCEs特定机械性能的改善必须以牺牲其他 性能为代价. 在本工作中, 通过简单的硫醇-丙烯酸酯反应制备了LCE, 随后进行光引发的自由基聚合. 通过调节侧链液晶(LC)基元的含量, 调 控了液晶网络的交联密度, 优化了LCE的驱动. 侧链LC基元的引入降低 了驱动温度并且提高了驱动应变, 而丙烯酸酯官能化的MXene纳米片 交联了LCE基体, 确保了高驱动应力和光热转化. 因此, 本工作通过引 入侧链基元和MXene纳米片作为交联剂, 同时增强了LCE的驱动应力 和驱动应变, 克服了LCE致动器以往高温或有害紫外光驱动、物理掺 杂引起的分子扰动等局限性, 大大提高了整体驱动性能(驱动应力为 0.773 MPa, 驱动应变为45%), 实现了近红外光下的可逆变形(54%). 该 策略可能为优化LCE执行器的性能提供一条新途径.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Materials and Mechanics · Advanced Sensor and Energy Harvesting Materials · Liquid Crystal Research Advancements
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (52)
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