相关实验视频
Updated: Jan 9, 2026

12:04
Microfluidic Preparation of Liquid Crystalline Elastomer Actuators
Published on: May 20, 2018
9.4K
动态键强度对液晶弹性的训练的影响
E Ghimire1, I S Appen1, C A Lindberg1
1Pritzker School of Molecular Engineering, University of Chicago Chicago Illinois 60637 USA stuartrowan@uchicago.edu.
Chemical science
|December 8, 2025
概括
动态液晶弹性体 (dLCE) 通过量身定制的动态键表现出增强的机械性能和形状记忆效应. 基于disenide的DLCE表现出优越的性和可训练性,使可编程材料的响应成为可能.
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
- 软物质物理学 软物质物理学
背景情况:
- 软材料可以通过环境压力训练来提高性能.
- 动态液晶弹性体 (dLCEs) 结合了液晶性与动态键的调节性质.
研究的目的:
- 通过探索动态键强度的影响来研究DLCE的可训练性.
- 了解机械和热刺激如何影响DLCE的特性和执行.
- 在DLCE中展示可编程的形状变形和可回收性.
主要方法:
- 合成基于aza-Michael的DLCEs,具有不同的动态键 (无,二硫化物,二化物).
- 热力学和液晶性质的表征.
- 机械应变和热循环用于训练方案的应用.
- 螺旋执行器的制造和测试.
主要成果:
- 带有脱化物键的DLCE显示出显著更高的室温性.
- 基于迪塞利尼德的DLCE在高温下表现出增强的执行和硬度.
- 经过训练的DLCE执行器在它们的阴性-同位素过渡上演示了自我维持的运动.
- 通过使用蓝光控制,从一个样本中创建了两个不同的执行器形状,从而实现了可重组性.
结论:
- 动态键强度极大地影响DLCE的特性和可训练性.
- 结合热力和机械训练协议,可实现复杂的功能反应.
- 空间控制的训练为复杂的可编程软材料执行器提供了一条途径.
相关概念视频
Bonding and Strength of Aggregate
440
The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
440
Plastic Behavior
500
A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
500

